Ke CAI

Pretty Format XML in Java

2012-01-05T10:44:00.000+11:00

I've been playing with Amazon Product Advertising API for a while. One of the pain is reading the xml response, it's all in one line and I have to scroll to find useful information. Then I began to create a xml file and copy the response string into this file, using Eclipse's auto format this xml file. It's still painful when there are a lot of request need to try. So I brought this pretty xml

Extracting RAR Archives in Java using JUnrar

2011-12-18T11:02:00.002+11:00

I just found a wonderful open source RAR Archives library in Java, jUnrar. It seems this project moved from sourceforge.net and document is still on the way. There is a JUnit test project comes with the source shows how to use it. I modified it a little bit to make is simpler. The following code will extract mytest.rar into the user home directory. 1. construct rar Archive from File File

Simple Pagination with Lucene Search Results

2011-10-17T22:22:00.003+11:00

It is still not very straghtforward to do search result pagination in Lucene. The simplest way is still do the same search again and populate the next group of documents. Firstly, create a Page object to calculate start and end index for certain page number. for example, page 3's record start from 20 to 29 if we show 10 records for each page. public class Page implements Serializable {

Escape Pasted Text into String in Eclipse

2011-08-14T12:09:00.012+10:00

I often copy & paste text into Java Class file when I use Eclipse, especially when writing unit testing. It bothered when the text is long, when I need to add " and /n by hand to make it legally String. Finally, I found Eclipse is smart enough to do this escape automatically. But you need to enable it via: Windows --> Preferences --> Java --> Editor --> Typing --> In string literals --> Escape

Pagination with LazyDataModel loading from Spring Service in Primefaces

2011-07-12T10:39:00.000+10:00

DataTable component in Primefaces is very powerful and flexible. It provides LazyDataModel mechanism to load pagination data. Here is my note about how to invoke injected Spring service to load data from database. 1. Integrate Spring and JSF <?xml version="1.0" encoding="utf-8"?> org.springframework.web.jsf.el.SpringBeanFacesELResolver  2. Inject Spring Service

Removing border from layout unit in PrimeFaces 3.0

2011-06-20T11:37:00.002+10:00

jQuery UI is my favorite JavaScript widget library. I tried create JSP tag library to reuse it in my web applications. Then I switched to JSF and found the wonderful PrimeFaces implemented via jQuery UI. What a smart combination! But, as always, we need a little hack to make it works as we want. My first hacking is to hide the border in layout unit. After examined with firebug, I found the

Eclipse Tips for Android Development

2011-06-10T12:08:00.001+10:00

Honestly, developing android applications in Eclipse is not as pleasure as building iOS applications in Xcode. But the complication has to be, since android is addressed ao many vendors with variety of screen sizes and other differences. I will organize some productive tips to use Eclipse in android development. iOS application don't have to worry about different screen size, there is no layout

Build iOS Universal App without nib/xib

2011-05-31T11:39:00.002+10:00

I just upgraded my universal app, iDiff, with a few features. Since I draw and layout everything by hand, it is a waste to keep the appDegelate_iPhone, appDelegate_iPad, and their xibs file, MainWindow_iPhone.xib, MainWindow_iPad.xib. Here is my note about this modification. 1. Delete all files in iPhone and iPad folder. Those folders contain .h and .m file for iDiffAppDelegate_iPhone,

Tap Background to Dismiss Keyboard for UITextViews

2011-05-12T20:08:00.000+10:00

I found Apple didn't treat UITextView very well, they didn't provide "done" button in its keyboard. There are a lot of tutorials taught to listen "return" key stroke to dismiss the keyboard. However, I think this is very unwise since UITextView is supposed to carry multiply lines. Therefore, I will show you a better way to dismiss keyboard. Basically, what I'm going to do is add an invisible

Create favicon in Photoshop

2011-05-11T12:10:00.000+10:00

Although there are plenty of tutorials about favicon, I still provide a quick note for myself. Add ico format support for Photoshop download ico format file support, choose the right platform version, for me, is Windows (64 bit) – CS4 extract and copy ICOFormat64.8bi to C:\Program Files\Adobe\Adobe Photoshop CS4 (64 Bit)\Plug-ins\File Formats Create favicon in Photoshop I will recommend

iOpenSource

2011-05-09T12:32:00.000+10:00

I just submitted my first iPhone app. It's still waiting for review.

Pagination with UITableView in IOS Development[updated]

2011-04-14T20:46:00.002+10:00

Drag to refresh and click to load more is very popular in iOS apps, however, I'm still favor the "Pre", "Next" old style. This post will show you how to implement it in UITableView. As you can see from the screenshot, we're going to add the pagination bar in the UITableView's footer. In the pagination bar, we're going to add a text label to show current page number, a Previous button and a

Connect to 3G network from iPad 2 with TPG Mobile

2011-04-07T21:52:00.000+10:00

Lining up for 5 hours finally I got my 32G Black wifi and 3G model iPad2 on the launch day in Sydney. At first I'm not sure if I should buy another SIM card since my iPhone 4's 1G data is too much for me. But I found TPG's Pay-As-You-Go Plan, $1 per month for 150M data. It's so cheap and I cannot resist to buy one. However, it's not easy to setup because the poor documentation of TPG. I got the

Add libXML2 into iPhone Project in Xcode 4

2011-04-01T23:54:00.000+11:00

XCode 4 changed a lot, I'm kind of blind in its new UI. I cannot find where to add framework, even cannot figure out how to change newly added group's name. After some google, finally find the way. Step 1: add libxml2.dylib 1. Click your project (XmlTest) in the left navigator bar. 2. Select the target (XmlTest), then select "Build Phases" tab. 3. Expand "Link Binaries With Libraries" 4. Click

Create a Calendar View with JQuery UI Datepicker

2011-03-18T17:25:00.000+11:00

jQuery UI's Datepicker widget is widely used in form to select a date. Today I'm going to show you how to use Datepicker to create a calendar month view. Demo can be found here 1. Let's begin with those two sample appointments //sample appointments var appointment2= new Object; appointment2.date=new Date(2010, 2, 25);//25th March (month start from 0) appointment2.note="iPad2 goes Australia";

Kick Start GWT Poject with gwt-maven-plugin

2011-03-15T13:40:00.001+11:00

It's easy to start a GWT project in Eclipse with GWT Plugin for Eclipse. However, it's getting harder to manage the project while the dependencies growing, such as introducing Spring, Hibernate, JPA into your project. Therefore, I will show you how to kick start GWT Maven sample project. 1. create GWT project using mojo's gwt-maven-plugin archetype mvn archetype:generate -DarchetypeRepository=

SolrJ cookbook - Indexing

2011-02-26T11:06:00.013+11:00

In SolrJ, there are two approaches to index your document, either manually populate your SolrInputDocument, or add SolJ annotation Field in your POJO domain object. 1. indexing with annotated POJO Bean. This approach is easy when you start project from scratch, or at least you can access the source code. 1.1 The POJO import org.apache.solr.client.solrj.beans.Field; public class Post {

SolrJ cookbook - Setup

2011-02-25T11:06:00.000+11:00

Solr makes searching much easier for your web applications in any programming languages. I will write a series of posts about how to use its Java client, solrJ. Here is the first part, all about how to setup solrJ in your project. I'm using Maven and Spring framework. 1. Add solrJ dependency in your pom.xml: org.apache.solr solr-solrj ${solr.version} 2. Define Solr Server in

Dynamically create elements in jQuery Mobile

2011-02-11T10:38:00.000+11:00

jQuery Mobile is excellent to build mobile website. That is, you generate the html page using server side script, PHP, ASP or JSP. Then jQuery render the page in client side's browser. However, if you try to use it like traditional AJAX web apps, such as loading JSON result and append them in DOM, you will be in trouble, at least now (jQuery Mobile 1.0a2). I summarized some solutions to force

jQuery Template Markup and JSP Expression Language (EL)

2010-12-15T16:13:00.000+11:00

Maybe it is "great minds think alike"; both JSP Expression Language (EL) and jQuery Template use the ${} as variable placeholders and evaluate it. Since JSP will be complied at server side first, any ${} in JSP file will be evaluated first, even it means for jQuery template. When your result page return to user's browser and jQuery template energy try to complie the template, you will find your

Find and Kill Running Windows Processes in Java

2010-12-14T15:55:00.000+11:00

One of my friends asked me if it is possible to check a programming is running or not in Windows using Java. And close it if it is running. After a little bit research, I found the Java solution for his requirement. The key is Runtime.getRuntime().exec(), you can run commands available in this platform. In Windows, the "tasklist" command will show you all the processes running (In Linux, you

Dynamically Load Sidebar for Different Page in SiteMesh

2010-12-10T17:25:00.001+11:00

It is often the case that your page need to load different sidebar, according to its content. After few tries, I finally figure it out in Sitemesh through "meta" tag. 1. In my project, I prepare two side bars, sidebar.jsp and postsidebar.jsp and place them in the "decorator" directory. 2. In the decorator, default.jsp, get decorator property meta.sidebar and set it to "sidebar" variable.

File Upload with Uplodify and Spring MVC

2010-12-08T11:03:00.001+11:00

It provides user better experience if you can provide a progress indicator when they upload file to server. But this leave you not too many choices but flash in the client. Here is a quick note when I use Uplodify , a jQuery plugin that employ flash to upload file to the server powered by Spring MVC. Client Side 1. include necessary library <script type="text/javascript" src="<c:url value='/

Create Mobile Decorator with Sitemesh and jQuery Mobile

2010-12-06T17:01:00.001+11:00

In my previous post,Mobilize Your Java Web Application, I mentioned to provide a separate decorator for mobile user. In this post I will demonstrate how to achieve this: 1. automatically apply mobile decorator if the request came from mobile browser 2. leave it to user, if user choose the mobile version in their request parameter, such as "document/list?version=mobile". First of all, let me

Mobilize Your Java Web Application

2010-12-06T16:26:00.002+11:00

Mobile web access is growing by 30% every year, so do consider to make your Java web application work well on a small screen. In this post, I'm going to analyze a typical java web application and make it mobile access ready. Usually, a Java web application consist two parts: 1. the layout template framework, such as Tiles, or Sitemesh. 2. a web framework to handle request and return JSP