GWT PowerBegin

File or image store into database by gwt

noreply@blogger.com (GWT PowerBegin) — Sun, 27 Mar 2011 10:59:00 +0000

Requirements for this program:

To store file into database we need following things::

1. gwt-windows-1.7.1 (I just use this version to built this program another version is not worked properly).

2. MySql or Wamp (It is a software that is provide MySql. So install one of them).

3. MySql-Connector-jar file (It gives the facility to connect gwt-rpc to mysql database).

4. Eclipse SDK (It is the IDE that is used to create a gwt project )

Steps:

First Step:

First we shall create a new project which name is TestExample by Command Prompt.

G:\gwt-windows-1.7.1>webAppCreator -out TestExample com.TestExample

Now new project is created in gwt-windows-1.7.1. But we can not code or design in this code. So we have to import this project into eclipse IDE.

File => Import => Existing Projects into Workspace => Choose Project => Finish.

After importing your project into eclipse IDE you can code or design your project. Here you can give your suitable coding to store file or image into database mysql.

Second Step:

Now we have to perform second step to add mysql connector jar file (mysql-connector-java-5.1.6.jar) This jar file is work to connect database to gwt-rpc. It provides driver that can load the database and create a connection that are used to store file into database by gwt.

Right Click on TestExample => Build Path=> Add External Archives => Select the jar (mysql-connector-java-5.1.6.jar) file => Finish

Third Step:

In two steps all configuration is done in eclipse IDE. Now we have to focus on mysql to create table in which we want to store file. To store file into database table we need a data type that can store the bytes form of file in the table.

Command

Create table uploadfile (id int(5) NOT NULL auto_increment , topic text(30), stream text(15), tag text(30), publiclink text(30), filebody longblob);

NOT NULL:- Here Not null is used to protect id field form null value. It means that id can not contain the null value.

auto_increment:- It is a mysql variable that gives the auto incremented integer value and this value filled automatic every time.

longblob:- It is the data type which can contain the bytes of file into data base and long gives the wide range to store file bytes.

Forth Step:

Now you just open TestExample project files and edit code or match this code which is giving as follows:

GreetingService.java

package com.client;

import com.google.gwt.user.client.rpc.RemoteService;

import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;

/**

* The client side stub for the RPC service.

@RemoteServiceRelativePath("greet")

public interface GreetingService extends RemoteService {

String upload(String topic, String stream, String Tag, String plink, String fpath );

}

GreetinServiceAsync.java

package com.client;

import com.google.gwt.user.client.rpc.AsyncCallback;

/**

* The async counterpart of <code>GreetingService</code>.

public interface GreetingServiceAsync
{

void upload(String topic, String stream, String Tag, String plink, String fpath, AsyncCallback<String> callback );

}

TestExample.java

package com.client;

import com.google.gwt.core.client.EntryPoint;

import com.google.gwt.core.client.GWT;

import com.google.gwt.event.dom.client.ClickEvent;

import com.google.gwt.event.dom.client.ClickHandler;

import com.google.gwt.user.client.Window;

import com.google.gwt.user.client.rpc.AsyncCallback;

import com.google.gwt.user.client.ui.AbsolutePanel;

import com.google.gwt.user.client.ui.Button;

import com.google.gwt.user.client.ui.FileUpload;

import com.google.gwt.user.client.ui.Label;

import com.google.gwt.user.client.ui.ListBox;

import com.google.gwt.user.client.ui.RootPanel;

import com.google.gwt.user.client.ui.TextBox;

/**

* Entry point classes define <code>onModuleLoad()</code>.

public class TestExample implements EntryPoint

{

private final GreetingServiceAsync a1 = GWT.create(GreetingService.class);

RootPanel rt;

AbsolutePanel absolutePanel;

TextBox textBox;

ListBox comboBox;

TextBox textBox_1;

TextBox textBox_2;

FileUpload fileUpload;

Button button;

String s1,s2,s3,s4,s5;

public void onModuleLoad()

{

rt=RootPanel.get();

absolutePanel = new AbsolutePanel();

rt.add(absolutePanel, 218, 24);

absolutePanel.setSize("445px", "434px");

textBox = new TextBox();

absolutePanel.add(textBox, 143, 39);

Label lblTopic = new Label("Topic");

absolutePanel.add(lblTopic, 86, 42);

comboBox = new ListBox();

comboBox.addItem("Computer Science");

comboBox.addItem("Environment");

comboBox.addItem("Physics");

comboBox.addItem("Chemistry");

comboBox.addItem("Biology");

absolutePanel.add(comboBox, 143, 88);

comboBox.setSize("148px", "24px");

Label lblStreams = new Label("Streams");

absolutePanel.add(lblStreams, 69, 88);

textBox_1 = new TextBox();

absolutePanel.add(textBox_1, 143, 139);

Label lblTags = new Label("Tags");

absolutePanel.add(lblTags, 87, 139);

textBox_2 = new TextBox();

absolutePanel.add(textBox_2, 143, 194);

Label lblPublicLink = new Label("Public Link");

absolutePanel.add(lblPublicLink, 49, 194);

fileUpload = new FileUpload();

absolutePanel.add(fileUpload, 143, 254);

button = new Button("New button");

absolutePanel.add(button, 156, 311);

button.addClickHandler(new ClickHandler()

{

public void onClick(ClickEvent event)

{

Window.alert("onclick");

String topic=textBox.getText();

String strm=comboBox.getItemText(comboBox.getSelectedIndex());

String tag=textBox_1.getText();

String plink=textBox_2.getText();

String fpath=fileUpload.getFilename();

a1.upload(topic, strm, tag, plink, fpath, new AsyncCallback<String>()
{

@Override

public void onSuccess(String result)

{

// TODO Auto-generated method stub

String f="yes";

System.out.println(result);

// TODO Auto-generated method stub

if(result.equals(f))

{

System.out.println("onsuccess");

Window.alert("File Upload");

}

else

{

Window.alert("Filis not uploaded");

}

@Override

public void onFailure(Throwable caught)
{

// TODO Auto-generated method stub

Window.alert("Failure");

}

});

}

});

button.setText("Uplod lctr notes");

button.setSize("133px", "28px");

Label lblFile = new Label("File");

absolutePanel.add(lblFile, 98, 254);

lblFile.setSize("27px", "21px");

}

GreetingServiceimp.java

package com.server;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import com.client.GreetingService;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;

/**

* The server side implementation of the RPC service.

@SuppressWarnings("serial")

public class GreetingServiceImpl extends RemoteServiceServlet implements

GreetingService

{

Connection con=null;

Statement st=null;

ResultSet rs=null;

String query;

String url="jdbc:mysql://localhost:3306/gwtlogin";

public void call()

{

try

{

Class.forName("com.mysql.jdbc.Driver");

}

catch(ClassNotFoundException e)

{

System.out.print(e.getMessage());

}

try

{

con=DriverManager.getConnection(url, "root", "");

st=con.createStatement();

}

catch(SQLException e)

{

System.out.println(e.getMessage());

}

@Override

public String upload(String topic, String stream, String Tag, String plink,

String fpath) {

// TODO Auto-generated method stub

call();

String ss="no";

int k=0;

FileInputStream fis = null;

PreparedStatement pstmt = null;

System.out.println(fpath);

try

{

System.out.println("Hello try");

con.setAutoCommit(false);

File file = new File(fpath);

fis = new FileInputStream(file);

pstmt = con.prepareStatement("insert into uploadfile(Topic, Stream, Tag, PublicLink, FileBody ) values ( ?, ?, ?, ?, ?)");

//pstmt.setString(1, id);

pstmt.setString(1, topic);

pstmt.setString(2, stream);

pstmt.setString(3, Tag);

pstmt.setString(4, plink);

pstmt.setAsciiStream(5, fis, (int) file.length());

k=pstmt.executeUpdate();

System.out.println("Bye");

if(k==1)

{

ss="yes";

}

con.commit();

}

catch (Exception e)

{

System.err.println("Error: " + e.getMessage());

e.printStackTrace();

}

finally {

try {

pstmt.close();

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

try {

fis.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

try {

con.close();

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return ss;

}

}

I hope you will able to store file into database. If any error has occurred or any question comes in your mind. Freely ask your problem by comment we just solve your problem within 1 hour.

Namaste...Indian welcome and thanks

noreply@blogger.com (GWT PowerBegin) — Mon, 21 Mar 2011 13:25:00 +0000

Dear friends we are thankfull to you all for accepting and viewing our "gwtpowerbegin".We vishal dixit and sonal garg from India are thank full to you all friends from all around the world .Please give your valuable thoughts and suggetions so that we can make this blog more better and please give your feedback on the post....

Thank You World

gwtpowerbegin@gmail.com

gwtpowerbegin.blogspot.com

Omega Watches

noreply@blogger.com (GWT PowerBegin) — Sun, 20 Mar 2011 18:34:00 +0000

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5,55,121

Omega De Ville Co-Axial Chronograph (4650.20.32)

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For Other details pleasw see following link:-

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Titan Watches For Girls...

noreply@blogger.com (GWT PowerBegin) — Sun, 20 Mar 2011 18:00:00 +0000

Titan brand is very famous brand and its quality is qwesome so friends we are bringing for you collection of titan fo girls....
Take a look..

Rs:-1,019

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Check File extention in gwt

noreply@blogger.com (GWT PowerBegin) — Fri, 18 Mar 2011 02:01:00 +0000

CONCEPT

First file should be created.

In this example we just use a pdf file from desktop location. Then we get the name of file. getName() is the method to get file name and it returns the file name as string. so we store the name in string object filename. Another method which is used to break a string into substring and this method have two parameter Start index and End Index both parameter should be integer type. then we shoould have break filename from (".") +1 because extention is start after dot(.) +1 and last index number should be length of the filename string.

Syntax

File file=new File("C:/Users/vishal dixit/Desktop/app.pdf");

String filename=file.getName();

String extention=filename.substring(filename.lastIndexOf('.')+1, filename.length());

System.out.println(extention);

OUTPUT

pdf

Rename file in gwt

noreply@blogger.com (GWT PowerBegin) — Fri, 18 Mar 2011 01:26:00 +0000

CONCEPT
There is a technique to change a file name or rename file.
The logic to rename file is that old file is changed with new file with new name. and new file replace the old file. File constuctor should have the complete path with file name. renameTo() is the command to change the old file name to new file name.
Syntax
File newfile= new File("C:/Users/vishaldixit/Desktop/"+"newfile_name.jpg");

oldfile.renameTo(newfile);

File oldfile = new File("C:/Users/vishaldixit/Desktop/"+"odlfile_name.jpg");

See other programs in gwt which is required in any gwt project.

Converting or creating pdf file from richtexteditor to textfile

noreply@blogger.com (GWT PowerBegin) — Wed, 16 Mar 2011 18:17:00 +0000

In this post we are sharing the code to make udf file by text file....

Write.java

package com.server;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Date;

import com.client.GreetingService;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

/**
* The server side implementation of the RPC service.
*/
@SuppressWarnings("serial")
public class GreetingServiceImpl extends RemoteServiceServlet implements
    GreetingService {

    Connection con=null;
    Statement st=null;
    ResultSet rs=null;
    String query;

    String url="jdbc:mysql://localhost:3306/logindb";

public void call()
{
    try
    {
        Class.forName("com.mysql.jdbc.Driver");
    }
    catch(ClassNotFoundException e)
    {
        System.out.print(e.getMessage());
    }
    try
    {
        con=DriverManager.getConnection(url, "root", "");
        st=con.createStatement();
    }
    catch(SQLException e)
    {
        System.out.println(e.getMessage());
    }
}

@Override
public String check(String name, String password) {
    // TODO Auto-generated method stub
    String ss="no";
    call();
    try
    {
        rs = st.executeQuery("select * from admin where name='" + name + "' and password='" + password+"'" );

        if(rs.next())
        {
            ss="yes";
            System.out.println(rs.getString("name"));
            System.out.println(rs.getString("password"));

        }

    }
    catch(SQLException e)
    {
        System.out.println(e.getMessage());

    }

    return ss;
}

@Override
public String sign(String name, String password) {

    String ss="no";
    int k=0;
    call();
    try
    {
        k=st.executeUpdate("insert into admin values('" + name + "','" + password+"')" );

        if(k==1)
        {
            ss="yes";

        }

    }
    catch(SQLException e)
    {
        System.out.println(e.getMessage());

    }

    return ss;

    // TODO Auto-generated method stub

}

@SuppressWarnings("deprecation")
@Override
public String writee(String ss, String st, String sa) {
    // TODO Auto-generated method stub
    FileWriter ryt;
    try{
    System.out.println("123456789");
    Date today = new Date();
    // DateTimeFormat fmt = DateTimeFormat.getFormat("EEEE_MMMM_dd_yyyy");
        // prints Monday, December 17, 2007 in the default locale
        //GWT.log(fmt.format(today), null);

int s1=today.getDate();
int s2=today.getMonth();
int s3=today.getYear();
int s4=today.getHours();
int s5=today.getMinutes();
int s6=today.getSeconds();

    File ff=new File("G://gwt-2.0.4//gwt-2.0.4//proj//war//images//"+st+sa+"_"+s1+"."+s2+"."+s3+"_"+s4+"."+s5+"."+s6+".txt");
    ff.createNewFile();
    ryt=new FileWriter("G://gwt-2.0.4//gwt-2.0.4//proj//war//images//"+st+sa+"_"+s1+"."+s2+"."+s3+"_"+s4+"."+s5+"."+s6+".txt");






    BufferedWriter out = new BufferedWriter(ryt);
        out.write(ss);



        out.close();



        PDFConversion pdf=new PDFConversion();
        pdf.createPdf("G://gwt-2.0.4//gwt-2.0.4//proj//war//images//"+st+sa+"_"+s1+"."+s2+"."+s3+"_"+s4+"."+s5+"."+s6+".txt","G://gwt-2.0.4//gwt-2.0.4//proj//war//images//"+st+sa+"_"+s1+"."+s2+"."+s3+"_"+s4+"."+s5+"."+s6+".pdf",false);



    System.out.println("12dssdsfdbvfd3456789");

    }
    catch(Exception e)
    {

        System.out.println(e+"bghh");
    }
    return ss;

    }
}

PDFConversion.java

package com.server;
import com.google.gwt.user.client.ui.Frame;
import com.google.gwt.user.client.ui.RootPanel;
import com.gwtext.client.widgets.Window;
import com.gwtext.client.widgets.layout.FitLayout;
import com.lowagie.text.Document;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfWriter;
import java.io.File;
import java.io.FileOutputStream;
/**
*
* @author shunmuga
*/
public class PDFConversion
{
/**
* This method is used to convert the given file to a PDF format
* @param inputFile - Name and the path of the file
* @param outputFile - Name and the path where the PDF file to be saved
* @param isPictureFile
*/

public void createPdf(String inputFile, String outputFile, boolean isPictureFile) {
    // TODO Auto-generated method stub
    Rectangle pageSize = new Rectangle(2780, 2525);
        Document pdfDocument = new Document(pageSize);
         String pdfFilePath = outputFile;
         try
         {
             FileOutputStream fileOutputStream = new FileOutputStream(pdfFilePath);
             PdfWriter writer = null;
             writer = PdfWriter.getInstance(pdfDocument, fileOutputStream);
             writer.open();
             pdfDocument.open();
             /**
             * Proceed if the file given is a picture file
             */
              if (isPictureFile)
             {
              pdfDocument.add(com.lowagie.text.Image.getInstance(inputFile));
             }
             /**
             * Proceed if the file given is (.txt,.html,.doc etc)
             */
             else
             {
             File file = new File(inputFile);
             pdfDocument.add(new Paragraph(org.apache.commons.io.FileUtils.readFileToString(file)));
             }
             RootPanel rt=RootPanel.get();
             pdfDocument.close();
             writer.close();
             final Window window = new Window();
             window.setTitle("Calculation");
             window.setClosable(true);
             window.setPlain(true);
             window.setLayout(new FitLayout());

             Frame pdfFrame = new Frame();
             pdfFrame.setSize("100%", "100%");

             pdfFrame.setUrl(outputFile);
             window.add(pdfFrame);
             window.setCloseAction(Window.CLOSE);
             window.show();
             rt.add(window);



         }
         catch (Exception exception)
         {
          System.out.println("Document Exception!" + exception);
         }

}
}

This will make the pdf file on server side.....

Creating Text File from Richtexteditor in GWT

noreply@blogger.com (GWT PowerBegin) — Wed, 16 Mar 2011 17:09:00 +0000

Hi frndz !!!!!! we are again here to share our practically done work in gwt i.e. we make a text file or we convert the richtexteditor matter into the text file as follows:-

This file is to make richtexteditor and in this file there is onclick event of a button which will asynchronously call the writee() method at server side

Note- Make a "image" folder in war folder of your project.In this folder the textfile and images for richtexteditor fuctionality pictures will save.

Write.java
package com.client;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Date;

import com.gargoylesoftware.htmlunit.javascript.host.Window;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RichTextArea;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.RichTextArea.ExtendedFormatter;
import com.gwtext.client.widgets.Toolbar;
import com.gwtext.client.widgets.ToolbarButton;
import com.gwtext.client.widgets.event.ButtonListenerAdapter;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.gwtext.client.core.EventObject;
import com.google.gwt.user.datepicker.client.DateBox;
import com.gwtext.client.widgets.form.TimeField;
import com.google.gwt.user.datepicker.client.DateBox.DefaultFormat;
import com.google.gwt.i18n.client.DateTimeFormat;

@SuppressWarnings("deprecation")
public class Write extends Composite {

    RootPanel rootpanel;
    AbsolutePanel absolutePanel;
    Label stream;
    ListBox streamvalue ;
    Label subject;
    ListBox subjectvalue;
    Label lblTypeAProblem;
    RichTextArea richTextArea;
    ExtendedFormatter formatter;
    Toolbar tt;

    ToolbarButton bold;
    ToolbarButton italic;
    ToolbarButton underline;
    ToolbarButton leftjustification;
    ToolbarButton rightjustification;
    ToolbarButton centerjustification;

    ListBox fontsize;
    public Write() {
        final GreetingServiceAsync a1= GWT.create(GreetingService.class);

        rootpanel=RootPanel.get();

        absolutePanel = new AbsolutePanel();
        rootpanel.add(absolutePanel, 191, -4);
        absolutePanel.setSize("450px", "382px");
        stream = new Label("Stream");
        absolutePanel.add(stream, 201, 22);
        richTextArea = new RichTextArea();
        absolutePanel.add(richTextArea, 86, 170);
        richTextArea.setSize("354px", "98px");

        formatter=richTextArea.getExtendedFormatter();
        tt=new Toolbar();

        absolutePanel.add(tt, 88, 130);
        tt.setSize("351px", "31px");

        fontsize = new ListBox();

        absolutePanel.add(fontsize, 244, 134);
        fontsize.setSize("35px", "27px");
        fontsize.addItem("1");
        fontsize.addItem("2");
        fontsize.addItem("3");
        fontsize.addItem("4");
        fontsize.addItem("5");
        fontsize.addItem("6");
        fontsize.addItem("7");

        // tglbtnB = new ToggleButton("B");

        bold=new ToolbarButton();
        //bold.setToggleGroup("");
        bold.setText("");
        bold.setTooltip("Bold");
        bold.setCls("button");
        bold.setToggleGroup("format");
        bold.setIconCls("G:/gwt-2.0.4/gwt-2.0.4/proj/war/images/bold.gif");

        tt.addButton(bold);
        bold.setSize("34px", "30px");


        italic=new ToolbarButton();
        italic.setText("");
        italic.setTooltip("Italic");
        italic.setToggleGroup("format");
        italic.setIcon("G:/gwt-2.0.4/gwt-2.0.4/proj/war/images/italic.gif");

        tt.addButton(italic);

        underline=new ToolbarButton();
        underline.setText("");
        underline.setToggleGroup("format");
        underline.setIcon("G:/gwt-2.0.4/gwt-2.0.4/proj/war/images/underline.gif");
        tt.addButton(underline);

        leftjustification=new ToolbarButton();
        leftjustification.setToggleGroup("justification");
        leftjustification.setTooltip("left");
        leftjustification.setText("");
        leftjustification.setIcon("G:/gwt-2.0.4/gwt-2.0.4/proj/war/images/justifyleft.gif");

        tt.addButton(leftjustification);

        centerjustification=new ToolbarButton();
        centerjustification.setToggleGroup("justification");
        centerjustification.setText("");
        centerjustification.setIcon("G:/gwt-2.0.4/gwt-2.0.4/proj/war/images/justifyCenter.gif");
        centerjustification.setTooltip("Center");

        tt.addButton(centerjustification);

        rightjustification=new ToolbarButton();
        rightjustification.setToggleGroup("justification");
        rightjustification.setText("");
        rightjustification.setIcon("G:/gwt-2.0.4/gwt-2.0.4/proj/war/images/justifyRight.gif");
        rightjustification.setTooltip("Right");

        tt.addButton(rightjustification);


        DateBox dateBox = new DateBox();
        dateBox.setFormat(new DefaultFormat(DateTimeFormat.getFullDateFormat()));
        absolutePanel.add(dateBox, 177, 549);
        dateBox.setSize("98px", "23px");


        Label lblEnterDatetime = new Label("Enter Date/Time");
        absolutePanel.add(lblEnterDatetime, 56, 549);
        TimeField timeField = new TimeField("New time field", "time_field", 100);
        absolutePanel.add(timeField, 298, 548);

        Label lblTitle = new Label("Title");
        absolutePanel.add(lblTitle, 119, 52);
        lblTitle.setSize("254px", "18px");

        final TextBox txtbxTitle = new TextBox();
        txtbxTitle.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                txtbxTitle.setText("");
            }
        });
        txtbxTitle.setText("Title");
        absolutePanel.add(txtbxTitle, 257, 46);
        txtbxTitle.setSize("166px", "16px");

        Label lblAuthor = new Label("Author");
        absolutePanel.add(lblAuthor, 124, 82);
        lblAuthor.setSize("257px", "18px");

        final TextBox txtbxAuthorName = new TextBox();
        txtbxAuthorName.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {

                txtbxAuthorName.setText("");
            }
        });
        txtbxAuthorName.setText("Author name");
        absolutePanel.add(txtbxAuthorName, 260, 80);
        txtbxAuthorName.setSize("163px", "16px");

        Button button_1 = new Button("New button");
        button_1.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
            String ss=richTextArea.getText();
            String st=txtbxTitle.getText();
            String sa=txtbxAuthorName.getText();
            a1.writee(ss, sa,st, new AsyncCallback<String>() {

                @Override
                public void onSuccess(String result) {
                    // TODO Auto-generated method stub
                    System.out.println("i am just me jhiojjkj");

                    System.out.println("i am just me");
                }

                @Override
                public void onFailure(Throwable caught) {
                    // TODO Auto-generated method stub

                }

            });
            }
        });
        button_1.setText("Submit");
        absolutePanel.add(button_1, 213, 274);
        button_1.setSize("100px", "28px");

        bold.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {
            //richTextArea.setHTML("<b></b>");

            formatter.toggleBold();
            }
        });

        italic.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {

            formatter.toggleItalic();
            }
        });

        underline.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {
            formatter.toggleUnderline();
            }
        });

        leftjustification.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {

            formatter.setJustification(RichTextArea.Justification.LEFT);
            }
        });

        centerjustification.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {
                formatter.setJustification(RichTextArea.Justification.CENTER);
            }
        });

        rightjustification.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {
                formatter.setJustification(RichTextArea.Justification.RIGHT);
            }
        });

        fontsize.addChangeHandler(new ChangeHandler() {
            public void onChange(ChangeEvent event) {
                if(fontsize.isItemSelected(0))
            formatter.setFontSize(RichTextArea.FontSize.XX_SMALL);

                if(fontsize.isItemSelected(1))
                    formatter.setFontSize(RichTextArea.FontSize.X_SMALL);

                if(fontsize.isItemSelected(2))
                    formatter.setFontSize(RichTextArea.FontSize.SMALL);

                if(fontsize.isItemSelected(3))
                    formatter.setFontSize(RichTextArea.FontSize.MEDIUM);

                if(fontsize.isItemSelected(4))
                    formatter.setFontSize(RichTextArea.FontSize.LARGE);

                if(fontsize.isItemSelected(5))
                    formatter.setFontSize(RichTextArea.FontSize.X_LARGE);

                if(fontsize.isItemSelected(6))
                    formatter.setFontSize(RichTextArea.FontSize.XX_LARGE);




            }
        });







    }

}

GreetingService.java

package com.client;

import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;

/**
* The client side stub for the RPC service.
*/
@RemoteServiceRelativePath("greet")
public interface GreetingService extends RemoteService {

String check(String name, String password);
String sign(String name, String password);
String writee(String ss,String st,String sa);
}

GreetingServiceAsync.java

package com.client;

import com.google.gwt.user.client.rpc.AsyncCallback;

/**
* The async counterpart of <code>GreetingService</code>.
*/
public interface GreetingServiceAsync {

void check(String name, String password, AsyncCallback<String> callback);
void sign(String name, String password, AsyncCallback<String> callback);
void writee(String ss, String sa,String st, AsyncCallback<String> callback);

}

GreetingServiceImpl.java
package com.server;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Date;

import com.client.GreetingService;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

/**
* The server side implementation of the RPC service.
*/
@SuppressWarnings("serial")
public class GreetingServiceImpl extends RemoteServiceServlet implements
    GreetingService {

    Connection con=null;
    Statement st=null;
    ResultSet rs=null;
    String query;

    String url="jdbc:mysql://localhost:3306/logindb";

public void call()
{
    try
    {
        Class.forName("com.mysql.jdbc.Driver");
    }
    catch(ClassNotFoundException e)
    {
        System.out.print(e.getMessage());
    }
    try
    {
        con=DriverManager.getConnection(url, "root", "");
        st=con.createStatement();
    }
    catch(SQLException e)
    {
        System.out.println(e.getMessage());
    }
}

@Override
public String check(String name, String password) {
    // TODO Auto-generated method stub
    String ss="no";
    call();
    try
    {
        rs = st.executeQuery("select * from admin where name='" + name + "' and password='" + password+"'" );

        if(rs.next())
        {
            ss="yes";
            System.out.println(rs.getString("name"));
            System.out.println(rs.getString("password"));

        }

    }
    catch(SQLException e)
    {
        System.out.println(e.getMessage());

    }

    return ss;
}

@Override
public String sign(String name, String password) {

    String ss="no";
    int k=0;
    call();
    try
    {
        k=st.executeUpdate("insert into admin values('" + name + "','" + password+"')" );

        if(k==1)
        {
            ss="yes";

        }

    }
    catch(SQLException e)
    {
        System.out.println(e.getMessage());

    }

    return ss;

    // TODO Auto-generated method stub

}

@SuppressWarnings("deprecation")
@Override
public String writee(String ss, String st, String sa) {
    // TODO Auto-generated method stub
    FileWriter ryt;
    try{
    System.out.println("123456789");
    Date today = new Date();
    // DateTimeFormat fmt = DateTimeFormat.getFormat("EEEE_MMMM_dd_yyyy");
        // prints Monday, December 17, 2007 in the default locale
        //GWT.log(fmt.format(today), null);

int s1=today.getDate();
int s2=today.getMonth();
int s3=today.getYear();
int s4=today.getHours();
int s5=today.getMinutes();
int s6=today.getSeconds();

    File ff=new File("G://gwt-2.0.4//gwt-2.0.4//proj//war//images//"+st+sa+"_"+s1+"."+s2+"."+s3+"_"+s4+"."+s5+"."+s6+".txt");
    ff.createNewFile();
    ryt=new FileWriter("G://gwt-2.0.4//gwt-2.0.4//proj//war//images//"+st+sa+"_"+s1+"."+s2+"."+s3+"_"+s4+"."+s5+"."+s6+".txt");






    BufferedWriter out = new BufferedWriter(ryt);
        out.write(ss);



        out.close();





    System.out.println("12dssdsfdbvfd3456789");

    }
    catch(Exception e)
    {

        System.out.println(e+"bghh");
    }
    return ss;

    }

}

Now You can use this code to make text file in gwt.
For any other discussion about this topic are most welcome ...

Tsunami and EarthQuake in JAPAN

noreply@blogger.com (GWT PowerBegin) — Tue, 15 Mar 2011 04:24:00 +0000

In JAPAN the natural disaster has finished a lots of life but why there is no help provided for that.People has no home, no food, no other facilities .All the world is with JAPANIES bcoz the courage of Japanies inspire us lot... We request to all of the world that they should help the Japan by prayer n if it is possible by economic and other facilities....Thosands of people lost their home their family . This can be happen in any area of world so this is the time when all the world people should be together to give support to each other .

Hydrozen blast in Japan....

Radiation fears after Japan blast

Explosions at a Japanese quake-stricken nuclear plant have led to radiation levels that can affect human health, a senior Japanese official has said.

Exclusion zone

A fresh explosion rocked reactor 2 at the Fukushima Daiichi plant - 250km (155 miles) north-east of Tokyo - in the early hours of Tuesday.

JAPAN NUCLEAR EMERGENCY

Explosions in three reactors at Fukushima plant
Fourth reactor on fire
Containment chamber damaged at reactor 2
Radiation levels at plant rise more than four fold
20km (12 mile) exclusion zone
People living within 30km to stay indoors

Pics of JAPAN Tsunami and Earth Quake

We Appeal to all human that they should share their views with us on how can we help Japan....................

WE ARE HUMAN , WE SHOULD SUPPORT EACH OTHER..........

FileUpload in GWT with servlet

noreply@blogger.com (GWT PowerBegin) — Mon, 07 Mar 2011 18:16:00 +0000

File uploading program is a combination of client and server sub programs.
There are some jar files which is neccessary to make this project.

Requirements:

1. Commons-fileupload-1.2.1
       Download- Commons-fileupload-1.2.1.jar

2. Commons-io-1.4
      Download- Commons-io-1.4.jar

3. Missing plugins for your browser
     Download- missing plugins

Step1:-

First you create a new project. The name of this project is FileUploadExample.

Step2:-

Right click on left side-->Import-->General-->Existing Projects into workspace-->next-->Browse the FileUploadExample-->Finish

Step3:-

Add a composite in com.client

Right click on com.client-->Google Web Toolkit-->Composite-->Name(FileUploadDesign)-->Finish
and paste this code into this file.

                                                              FileUploadDesign.java

package com.client;
import com.google.gwt.core.client.GWT;
import com.gwtext.client.core.Connection;
import com.gwtext.client.core.EventObject;
import com.gwtext.client.data.FieldDef;
import com.gwtext.client.data.RecordDef;
import com.gwtext.client.data.StringFieldDef;
import com.gwtext.client.data.XmlReader;
import com.gwtext.client.widgets.Button;
import com.gwtext.client.widgets.MessageBox;
import com.gwtext.client.widgets.Window;
import com.gwtext.client.widgets.event.ButtonListenerAdapter;
import com.gwtext.client.widgets.form.Form;
import com.gwtext.client.widgets.form.FormPanel;
import com.gwtext.client.widgets.form.TextField;
import com.gwtext.client.widgets.form.event.FormListenerAdapter;
import com.google.gwt.user.client.ui.Grid;
import com.google.gwt.user.client.ui.Image;
public class FileUploadDesign extends Window
{

FormPanel formPanel = new FormPanel();
Grid grid = new Grid(1,1);
public FileUploadDesign()
{
                       super("Photo Upload");
                       setSize("500px", "400px");
                       formPanel.setFileUpload(true);

                    //setup error reader to process from submit response from server
                    RecordDef errorRecordDef = new RecordDef(new FieldDef[]
                                                                              {
                                               new StringFieldDef("id"),new StringFieldDef("msg")
                                                                            });
                      XmlReader errorReader = new XmlReader("field", errorRecordDef);
                      errorReader.setSuccess("@success");
                      formPanel.setErrorReader(errorReader);
                      final TextField textField = new TextField("Photo", "file");
                      textField.setInputType("file");
                     textField.setSize("334px", "28px");
                     formPanel.add(textField);
                    this.add(formPanel);
                    this.addButton(new Button("Submit",new ButtonListenerAdapter()
                   {
                          public void onClick(Button button, EventObject e)
                           {
                MessageBox.confirm("Confirm", "Do you want to submit?",new MessageBox.ConfirmCallback()
                                              {
                                                      public void execute(String btnID)
                                                               {
                                                                   if (btnID.equals("yes"))
                                                                        {
                                                                              //Do not change here in this syntax
formPanel.getForm().submit(GWT.getModuleBaseURL()+"upload", null, Connection.POST, "Saving Data...", true);

                                                                        }
                                                              }
                                            });
                       }
   }));
                           formPanel.addFormListener(new FormListenerAdapter()
                          {
                                     public boolean doBeforeAction(Form form)
                                    {
                                           return true;
                                    }
                               public void onActionComplete(Form form, int httpStatus, java.lang.String responseText)
                              {
                                              //set here the root directory path
                                               Image image = new Image("g:/images/"+responseText);
                                               image.setSize("300px", "300px");
                                               boolean b=image.isVisible();
                                               System.out.print(b);
                                              grid.setWidget(0, 0,image);
                              }
                      public void onActionFailed(Form form, int httpStatus, java.lang.String responseText)
                       {
                           com.google.gwt.user.client.Window.alert("File upload is failed.");
                         }
              });
           this.add(grid);
}
}

Step4:-
Now we should configure GWT-Ext

Right click on com.client-->Google Web Toolkit-->Configure for using GWT-Ext

Step5:-Add a Server page on com.server. Here Servlet is working as fileuploading server.
so create a class at server side and delete all code and then paste the blow code.

Right click on com.server-->New-->Class-->Name(FileUploadServlet)-->Finish

                                                                  FileUploadServlet.java

package com.server;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.activation.MimetypesFileTypeMap;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FilenameUtils;
import com.google.gwt.user.client.Window;
@SuppressWarnings("serial")
public class FileUploadServlet extends HttpServlet
{
protected void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException
   {

   //Set the root directory where you want to store the uploaded files
   String rootDirectory = "g:/images/";
   // Check that we have a file upload request
   boolean isMultipart = ServletFileUpload.isMultipartContent(request);

   if (isMultipart)
   {
    // Create a factory for disk-based file items
    FileItemFactory factory = new DiskFileItemFactory();
    // Create a new file upload handler
    ServletFileUpload upload = new ServletFileUpload(factory);

    // Process the uploaded items

    try {
      // Parse the request
      List items = upload.parseRequest(request);
      // Process the uploaded items
      Iterator iter = items.iterator();
      while (iter.hasNext())
      {
       FileItem item = (FileItem) iter.next();

       if (item.isFormField())
       {
        String fieldName = item.getFieldName();
        String fileName = item.getName();
        String contentType = item.getContentType();
        boolean isInMemory = item.isInMemory();
        long sizeInBytes = item.getSize();
       }
       else
       {
        String fileName = item.getName();
        if (fileName != null && !fileName.equals(""))
        {
         fileName = FilenameUtils.getName(fileName);
         File uploadedFile = new File(rootDirectory + fileName);


         try {
            item.write(uploadedFile);
            //here set the root directory path
            File newfile=new File("g://gwt-windows-1.7.1//logcom//war//images//"+uploadedFile.getName()+".jpg");
            uploadedFile.renameTo(newfile);
            response.getWriter().write(newfile.getName());

          }
         catch (Exception e)
         {
           e.printStackTrace();
         }
        }
       }
      }
     }
    catch (FileUploadException e)
    {
     e.printStackTrace();
    }
   }
   }
}

Step6:-

Add External jar
Now we need to add jar file in Eclipse IDE. And command to add jar file is giving blow.

Right click on main FileUploadExample-->Build Path-->Add External Archives-->select the jar file

Step7:-

Now edit the Web.xml

Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>


<servlet>
    <servlet-name>upload</servlet-name>
    <servlet-class>com.server.FileUploadServlet</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>upload</servlet-name>
    <url-pattern>/fileuploadexample/upload</url-pattern>
</servlet-mapping>


<welcome-file-list>
    <welcome-file>FileUploadExample.html</welcome-file>
</welcome-file-list>

</web-app>

Now you run this project You will able to upload files.

If you have any problem then you can mail us to contact our gwt team Miss Sonal Garg and Mr. Vishal Dixit.

RichTextEditor in GWT,Tree in GWT

noreply@blogger.com (GWT PowerBegin) — Mon, 07 Mar 2011 15:56:00 +0000

This is code for Making tree in GWT and by this we are also calling "write.java" in which "RICHTEXTEDITOR's" coding exists...

Step1:- EnggHeads.java

package com.client;

import com.google.gwt.user.client.ui.Button;

public class EnggHeads {
   RootPanel rt;
   AbsolutePanel absolutePanel_left;
   AbsolutePanel absolutePanel_right;

   public EnggHeads() {
       rt=RootPanel.get();
       HorizontalSplitPanel horizontalSplitPanel = new HorizontalSplitPanel();

       rt.add(horizontalSplitPanel, 0, 0);
       horizontalSplitPanel.setSize("1000px", "1000px");

       horizontalSplitPanel.setSplitPosition("150");

       absolutePanel_right = new AbsolutePanel();
       horizontalSplitPanel.setRightWidget(absolutePanel_right);
       absolutePanel_right.setSize("100%", "590px");

       AbsolutePanel absolutePanel_left = new AbsolutePanel();
       horizontalSplitPanel.setLeftWidget(absolutePanel_left);
       absolutePanel_left.setSize("100%", "100%");

       TreeItem root = new TreeItem("Research Paper");
       root.setHeight("124px");
       Hyperlink hyper_upload=new Hyperlink("Upload", false, "newHistoryToken");
       hyper_upload.addClickHandler(new ClickHandler() {
           public void onClick(ClickEvent event) {
               absolutePanel_right.clear();
               FileUploader1 f= new FileUploader1();
               f.setVisible(true);

           }
       });
        root.addItem(hyper_upload);
      Hyperlink hh= new Hyperlink("Write", false, "newHistoryToken");
       hh.addClickHandler(new ClickHandler() {

       @Override
       public void onClick(ClickEvent event) {
           // TODO Auto-generated method stub
           absolutePanel_right.clear();
           Write ff=new Write();   //This is calling of the class write in which richtexteditor code exists
           ff.setVisible(true);
       }
   });
       root.addItem(hh);
        Tree t = new Tree();
        t.addItem(root);
        root.setState(true);

        absolutePanel_left.add(t);
   }
}

Step2:-
Make a folder images in war folder of your project and inser these below listed icons in that--
http://scripts.ringsworld.com/news-publishing/easynews17/icons/bold.gif.html
http://scripts.ringsworld.com/news-publishing/easynews17/icons/italic.gif.html
http://scripts.ringsworld.com/news-publishing/easynews17/icons/underline.gif.html
http://s613.photobucket.com/albums/tt219/brakesk8/?action=view&current=justifycenter.gif&newest=1
http://s610.photobucket.com/albums/tt189/tonybee9119/icon/?action=view&current=justifyright.gif&currenttag=icon

Step3:- Now after saving these images make another file "write.java"

package com.client;

import java.io.File;
import java.io.IOException;

import org.eclipse.swt.internal.win32.CREATESTRUCT;

import com.gargoylesoftware.htmlunit.javascript.host.Window;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RichTextArea;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.RichTextArea.ExtendedFormatter;
import com.gwtext.client.widgets.Toolbar;
import com.gwtext.client.widgets.ToolbarButton;
import com.gwtext.client.widgets.event.ButtonListenerAdapter;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.gwtext.client.core.EventObject;
import com.google.gwt.user.datepicker.client.DateBox;
import com.gwtext.client.widgets.form.TimeField;
import com.google.gwt.user.datepicker.client.DateBox.DefaultFormat;
import com.google.gwt.i18n.client.DateTimeFormat;

@SuppressWarnings("deprecation")
public class Write extends Composite {
    RootPanel rootpanel;
    AbsolutePanel absolutePanel;
    Label stream;
    ListBox streamvalue ;
    Label subject;
    ListBox subjectvalue;
    Label lblTypeAProblem;
    RichTextArea richTextArea;
    ExtendedFormatter formatter;
    Toolbar tt;

    ToolbarButton bold;
    ToolbarButton italic;
    ToolbarButton underline;
    ToolbarButton leftjustification;
    ToolbarButton rightjustification;
    ToolbarButton centerjustification;

    ListBox fontsize;
    public Write() {

        rootpanel=RootPanel.get();

        absolutePanel = new AbsolutePanel();
        rootpanel.add(absolutePanel, 191, -4);
        absolutePanel.setSize("450px", "382px");
        stream = new Label("Stream");
        absolutePanel.add(stream, 201, 22);
        richTextArea = new RichTextArea();
        absolutePanel.add(richTextArea, 86, 170);
        richTextArea.setSize("354px", "98px");

        formatter=richTextArea.getExtendedFormatter();
        tt=new Toolbar();

        absolutePanel.add(tt, 88, 130);
        tt.setSize("351px", "31px");

        fontsize = new ListBox();

        absolutePanel.add(fontsize, 244, 134);
        fontsize.setSize("35px", "27px");
        fontsize.addItem("1");
        fontsize.addItem("2");
        fontsize.addItem("3");
        fontsize.addItem("4");
        fontsize.addItem("5");
        fontsize.addItem("6");
        fontsize.addItem("7");

        // tglbtnB = new ToggleButton("B");

        bold=new ToolbarButton();
        //bold.setToggleGroup("");
        bold.setText("");
        bold.setTooltip("Bold");
        bold.setCls("button");
        bold.setToggleGroup("format");
        bold.setIconCls("G:/gwt-2.0.4/gwt-2.0.4/logcom/war/images/bold.gif");

        tt.addButton(bold);
        bold.setSize("34px", "30px");

        italic=new ToolbarButton();
        italic.setText("");
        italic.setTooltip("Italic");
        italic.setToggleGroup("format");
        italic.setIcon("G:/gwt-2.0.4/gwt-2.0.4/logcom/war/images/italic.gif");

        tt.addButton(italic);

        underline=new ToolbarButton();
        underline.setText("");
        underline.setToggleGroup("format");
        underline.setIcon("G:/gwt-2.0.4/gwt-2.0.4/logcom/war/images/underline.gif");
        tt.addButton(underline);

        leftjustification=new ToolbarButton();
        leftjustification.setToggleGroup("justification");
        leftjustification.setTooltip("left");
        leftjustification.setText("");
        leftjustification.setIcon("G:/gwt-2.0.4/gwt-2.0.4/logcom/war/images/justifyleft.gif");

        tt.addButton(leftjustification);

        centerjustification=new ToolbarButton();
        centerjustification.setToggleGroup("justification");
        centerjustification.setText("");
        centerjustification.setIcon("G:/gwt-2.0.4/gwt-2.0.4/logcom/war/images/justifyCenter.gif");
        centerjustification.setTooltip("Center");

        tt.addButton(centerjustification);

        rightjustification=new ToolbarButton();
        rightjustification.setToggleGroup("justification");
        rightjustification.setText("");
        rightjustification.setIcon("G:/gwt-2.0.4/gwt-2.0.4/logcom/war/images/justifyRight.gif");
        rightjustification.setTooltip("Right");

        tt.addButton(rightjustification);


        DateBox dateBox = new DateBox();
        dateBox.setFormat(new DefaultFormat(DateTimeFormat.getFullDateFormat()));
        absolutePanel.add(dateBox, 177, 549);
        dateBox.setSize("98px", "23px");


        Label lblEnterDatetime = new Label("Enter Date/Time");
        absolutePanel.add(lblEnterDatetime, 56, 549);
        TimeField timeField = new TimeField("New time field", "time_field", 100);
        absolutePanel.add(timeField, 298, 548);

        Label lblTitle = new Label("Title");
        absolutePanel.add(lblTitle, 119, 52);
        lblTitle.setSize("254px", "18px");

        final TextBox txtbxTitle = new TextBox();
        txtbxTitle.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                txtbxTitle.setText("");
            }
        });
        txtbxTitle.setText("Title");
        absolutePanel.add(txtbxTitle, 257, 46);
        txtbxTitle.setSize("166px", "16px");

        Label lblAuthor = new Label("Author");
        absolutePanel.add(lblAuthor, 124, 82);
        lblAuthor.setSize("257px", "18px");

        final TextBox txtbxAuthorName = new TextBox();
        txtbxAuthorName.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {

                txtbxAuthorName.setText("");
            }
        });
        txtbxAuthorName.setText("Author name");
        absolutePanel.add(txtbxAuthorName, 260, 80);
        txtbxAuthorName.setSize("163px", "16px");

        Button button_1 = new Button("New button");
        button_1.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
            String ss=richTextArea.getText();
            String st=txtbxTitle.getText();
            String sa=txtbxAuthorName.getText();
        com.google.gwt.user.client.Window.alert(ss);

            }
        });
        button_1.setText("Submit");
        absolutePanel.add(button_1, 213, 274);
        button_1.setSize("100px", "28px");

        bold.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {
            //richTextArea.setHTML("<b></b>");

            formatter.toggleBold();
            }
        });

        italic.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {

            formatter.toggleItalic();
            }
        });

        underline.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {
            formatter.toggleUnderline();
            }
        });

        leftjustification.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {

            formatter.setJustification(RichTextArea.Justification.LEFT);
            }
        });

        centerjustification.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {
                formatter.setJustification(RichTextArea.Justification.CENTER);
            }
        });

        rightjustification.addListener(new ButtonListenerAdapter() {
            public void onClick(com.gwtext.client.widgets.Button button, EventObject e) {
                formatter.setJustification(RichTextArea.Justification.RIGHT);
            }
        });

        fontsize.addChangeHandler(new ChangeHandler() {
            public void onChange(ChangeEvent event) {
                if(fontsize.isItemSelected(0))
            formatter.setFontSize(RichTextArea.FontSize.XX_SMALL);

                if(fontsize.isItemSelected(1))
                    formatter.setFontSize(RichTextArea.FontSize.X_SMALL);

                if(fontsize.isItemSelected(2))
                    formatter.setFontSize(RichTextArea.FontSize.SMALL);

                if(fontsize.isItemSelected(3))
                    formatter.setFontSize(RichTextArea.FontSize.MEDIUM);

                if(fontsize.isItemSelected(4))
                    formatter.setFontSize(RichTextArea.FontSize.LARGE);

                if(fontsize.isItemSelected(5))
                    formatter.setFontSize(RichTextArea.FontSize.X_LARGE);

                if(fontsize.isItemSelected(6))
                    formatter.setFontSize(RichTextArea.FontSize.XX_LARGE);




            }
        });

    }
}

This is all about richtexteditor in gwt.You can also add additional functions in it as per your requirement..

Thanks for your attentions...

Vishal Dixit,Sonal Garg

Remaining Database connectivity of gwt with mysql.......

noreply@blogger.com (GWT PowerBegin) — Sun, 20 Feb 2011 16:42:00 +0000

Hi..
Step 6-In the left hand side click on tree of the project and src will be extract...
In src >com.client> there are 4 files

loginpage
Newuser
GreetingService.java
GreetingServiceAsync.java

GreetingService.java

package com.client;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
/**
* The client side stub for the RPC service.
*/
@RemoteServiceRelativePath("greet")
public interface GreetingService extends RemoteService {
String check(String name,String password);
String newuser(String name,String password);
}

Code for GreetingServiceAsync.java

interface GreetingServiceAsync {void check(String name,String password, AsyncCallback<String> callback);void newuser(String name,String password,AsyncCallback<String> callback);

com.client;

package

import

/**

* The async counterpart of

<code>GreetingService</code>.

public

void check(String name,String password, AsyncCallback<String> callback);

void newuser(String name,String password,AsyncCallback<String> callback);

}

interface GreetingServiceAsync { com.google.gwt.user.client.rpc.AsyncCallback;

Step 7-

Open src > Com.Server >

Greeting ServiceImpl.java

package com.server;

import java.net.ConnectException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import com.client.GreetingService;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

/**
* The server side implementation of the RPC service.
*/
@SuppressWarnings("serial")
public class GreetingServiceImpl extends RemoteServiceServlet implements
    GreetingService {

Connection con=null;
Statement st=null;

ResultSet rs=null;

String url="jdbc:mysql://localhost:3306/mydb";

public void call()
{
try
{
   Class.forName("com.mysql.jdbc.Driver");
}
catch(ClassNotFoundException e)
{
   System.out.print(e.getMessage());
}
try
{
   con=DriverManager.getConnection(url, "root", "");
   st=con.createStatement();
}
catch(SQLException e)
{
   System.out.println(e.getMessage());
}
}

@Override
public String check(String s1, String s2) {
// TODO Auto-generated method stub
String ss="no";
call();

try
{

   rs = st.executeQuery("select * from login where name='" + s1 + "' and password='" + s2+"'" );

   if(rs.next())
   {
    ss="yes";
    System.out.println(rs.getString(0));
    System.out.println(rs.getString(1));
   }

}
catch(SQLException e)
{
  System.out.println(e.getMessage());

}

return ss;
}

@Override
public String newuser(String name, String password) {

String ss = "no";
call();

try
{
  boolean ss1;
   ss1 = st.execute("insert into login values('" + name+"','"+ password +"')");

   if(ss1)
   {


    ss="yes";
   }

}
catch(SQLException e)
{
  System.out.println(e.getMessage());

}

return ss;

}
}
Step 8-

Install MYSQL and start its all services
mysql cmd>create database mydb;
cmd > cretae table login(name varchar(20),password varchar(20));
insert into login values('vishal','myprogram');
insert into login values('sonal','helloworld');

Hence now the program is complete and u can us it for database connectivity.

Thank you,

gwtpowerbegin@gmail.com

SONAL GARG

VISHAL DIXIT

DataBase Connectivity of login form of GWT with MYSQL

noreply@blogger.com (GWT PowerBegin) — Sun, 20 Feb 2011 16:23:00 +0000

Hi...
In the last post we told u that u can make or design the login page according to you as you want.Now we will tell you to make conectivity with MYSQL database....
Steps to do it are as follows..

Step1-make a project in Command prompt as
                                     >webAppCreator -out loginpage com.loginpage

Step2- Now, in eclipse
                             File > import > Existing project into workspace>Browse loginpage>finish

Step3- add a mysql connector in the project as follow-
                    loginpage (right click) > build path > Add external archieves > Browse it and add it
Download connector by link-
Step4 - In the login page do coding as for example -

loginpage.java

package com.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.PasswordTextBox;
import com.google.gwt.user.client.ui.Hyperlink;

/**
* Entry point classes define <code>onModuleLoad()</code>.
*/
public class first implements EntryPoint {
/**
   * The message displayed to the user when the server cannot be reached or
   * returns an error.
   */
private static final String SERVER_ERROR = "An error occurred while "
      + "attempting to contact the server. Please check your network "
      + "connection and try again.";
/**
   * Create a remote service proxy to talk to the server-side Greeting service.
   */
   GreetingServiceAsync a1 = GWT.create(GreetingService.class);
/**
   * This is the entry point method.
   */
RootPanel root;
public void onModuleLoad() {
    root=RootPanel.get();

    final AbsolutePanel absolutePanel = new AbsolutePanel();
    root.add(absolutePanel, 31, 31);
    absolutePanel.setSize("383px", "237px");

    final TextBox textBox = new TextBox();
    absolutePanel.add(textBox, 196, 46);

    final PasswordTextBox passwordTextBox = new PasswordTextBox();
    absolutePanel.add(passwordTextBox, 196, 97);

    Button button = new Button("New button");
    button.addClickHandler(new ClickHandler() {
    public void onClick(ClickEvent event) {
       String s1=textBox.getText();
       String s2=passwordTextBox.getText();

      a1.check(s1,s2, new AsyncCallback<String>() {

    @Override
    public void onSuccess(String result) {
     // TODO Auto-generated method stub
     if(result.equals("yes"))
     Window.alert("Result ok");

    }

    @Override
    public void onFailure(Throwable caught) {
     Window.alert("Result not ok");
    }
   });
    }
    });
    button.setText("login");
    absolutePanel.add(button, 186, 158);

    Label lblUsername = new Label("UserName");
    absolutePanel.add(lblUsername, 75, 47);

    Label lblPassword = new Label("Password");
    absolutePanel.add(lblPassword, 75, 98);

    Label lblRegisteredUser = new Label("Registered User");
    absolutePanel.add(lblRegisteredUser, 122, 10);

    Hyperlink hprlnkNewUserClick = new Hyperlink("New User Click Me", false, "newHistoryToken");
    hprlnkNewUserClick.addClickHandler(new ClickHandler() {
    public void onClick(ClickEvent event) {
      absolutePanel.clear();
      NewUser n=new NewUser();
      n.setVisible(true);
          }
    });
    absolutePanel.add(hprlnkNewUserClick, 106, 206);

}
}
Design of loginpage.java

Step 5- Newuser.java

package com.client;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.user.client.ui.PasswordTextBox;
public class NewUser extends Composite {
RootPanel r1;
public NewUser() {
  r1=RootPanel.get();
  final GreetingServiceAsync a1=GWT.create(GreetingService.class);
  AbsolutePanel absolutePanel = new AbsolutePanel();
  r1.add(absolutePanel, 48, 10);
  absolutePanel.setSize("402px", "280px");

  final TextBox textBox = new TextBox();
  absolutePanel.add(textBox, 230, 52);

  Label lblUsername = new Label("Username");
  absolutePanel.add(lblUsername, 69, 53);

  Label lblPassword = new Label("Password");
  absolutePanel.add(lblPassword, 69, 116);

  Label lblConfirmPassword = new Label("Confirm Password");
  absolutePanel.add(lblConfirmPassword, 69, 184);

  Button button = new Button("New button");
  button.setText("Add Me");
  absolutePanel.add(button, 137, 222);

  final PasswordTextBox passwordTextBox = new PasswordTextBox();
  absolutePanel.add(passwordTextBox, 230, 115);

  final PasswordTextBox passwordTextBox_1 = new PasswordTextBox();
  absolutePanel.add(passwordTextBox_1, 230, 184);
  button.addClickHandler(new ClickHandler() {
   public void onClick(ClickEvent event) {
    String s1=textBox.getText();
             String s2=passwordTextBox.getText();
             String s3=passwordTextBox_1.getText();
            if(s2.equals(s3))
            {

              a1.newuser(s1, s2, new AsyncCallback<String>() {

               @Override
               public void onSuccess(String result)
               {

                if(result.equals("yes"))
                {
                 Window.alert("inserted");
                }

               }

@Override
public void onFailure(Throwable caught) {

  Window.alert("Try Again");

}
});

            }
            else

      {
       Window.alert("Please Enter Correct Password");

      }


   }
  });

}
}

for remaining code see next post

Create first poject in gwt

noreply@blogger.com (GWT PowerBegin) — Fri, 18 Feb 2011 13:27:00 +0000

Hi..
This will help you to make your gwt workable....
Essential software you should have are-

Eclipse download link-http://www.eclipse.org/downloads/
GWT download link-http://fileforum.betanews.com/detail/Google-Web-Toolkit-GWT-for-Windows/1147889979/1
MYSQL download link-
Step 1 -

cmd > gwt 1.7.1 >webAppCreator -out login com.login
Note- Here we are creating the project named "login"

>close cmd

Step 2 -

Open Eclipse
Open File menu
Choose import >Existing project into workspace>Select a root directory(Browse in GWT 1.7.1)>finish

After Finish login project will show at left side of screen.

Step 3- Right Click on login project > run as >Run Configuration >java Application >login >Run

After that login page will run

as...........................

Now You can design your own login page as you want you can also take help our next post...

Thank You...

Good Day....

gwtpowerbegin@gmail.com