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Created by Fang on January 31, 2012 15:40:34 Last update: January 31, 2012 15:41:28
This is a simple Hello World application with Spring 3 MVC. Like the default Apache HTTPd welcome page, it displays " It works! " when successfully deployed. The sole purpose is to show the minimum elements needed to setup Spring 3 MVC. I use Maven since it's so much easier than downloading the dependencies manually. Directory layout:
./src ./src/main ./src/main/webapp ./src/...pom.xml :
<?xml version="1.0" encoding="UTF-8"?> <project...WEB-INF/web.xml :
<?xml version="1.0" encoding="UTF-8"?> <web-app...WEB-INF/applicationContext.xml (empty, but needed):
<?xml version="1.0" encoding="UTF-8"?> <beans x...WEB-INF/spring-servlet.xml :
<?xml version="1.0" encoding="UTF-8"?> <beans x...WEB-INF/jsp/home.jsp :
<!DOCTYPE html> <html> <head> <title>H...Build with:
mvn clean packageThe resulting webapp is target/springmvc.war .
Created by freyo on May 13, 2011 15:45:29 Last update: September 20, 2011 08:08:12
This is an Android app that dumps any binarized xml file as plain text - to the sdcard on the device or emulator. build.xml :
<?xml version="1.0" encoding="UTF-8"?> <project...AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <man...res/layout/main.xml
<?xml version="1.0" encoding="utf-8"?> <Lin...res/values/strings.xml :
<?xml version="1.0" encoding="utf-8"?> <res...src/com/android/xmltool/DumpXml.java
package com.android.xmltool; import java.ut...Screenshot Pre-built APK can be downloaded from: http://code.google.com/p/android-binxml-dump/
Created by freyo on April 01, 2011 14:29:25 Last update: June 29, 2011 13:58:27
Start the emulator ( create an AVD if none exists)
$ tools/emulator -avd Simple8Create new project
$ tools/android create project \ > --package co...where " --target 2 " identifies the target platform as displayed by " tools/android list targets ", which is stored in the properties file default.properties in the project root folder. cd HelloWorld and install debug package onto the running emulator:
$ ant install Buildfile: build.xml [set...Launch the Hello World application on the emulator. You'll see something like this: Edit res/values/string.xml , change the contents to:
<?xml version="1.0" encoding="utf-8"?> <resourc...Edit res/layout/main.xml , change the contents to:
<?xml version="1.0" encoding="utf-8"?> <LinearL...The contents of the text area now refer to a string defined in the resource file strings.xml , instead...
Created by freyo on May 11, 2011 12:30:45 Last update: May 11, 2011 12:32:06
Android application builds use Xpath to query AndroidManifest.xml attributes. This is a simple build.xml to demo how it is set up:
<?xml version="1.0" encoding="UTF-8"?> <project...
Created by freyo on May 05, 2011 09:00:36 Last update: May 05, 2011 09:07:27
This example uses an Intent with Uri scheme tel: to invoke the phone dialer. Create a new project with:
$ ~/android-sdk-linux_86/tools/android create proj...Update the layout res/layout/main.xml to add a text field and a button:
<?xml version="1.0" encoding="utf-8"?> <LinearL...Update the Java class src/com/android/intenttest/CallPhone.java to handle button click and start the built-in phone dialer with Intent :
package com.android.intenttest; import andr...Update AndroidManifest.xml to add CALL_PHONE permission:
<?xml version="1.0" encoding="utf-8"?> <manifes...Install to the emulator and test:
ant installThe phone dialer will be invoked when you click the "Call" button. So how did this happen? The CallPhone activity creates an Intent with action Intent.ACTION_CALL and Uri tel:<a number> and sends it off to Android. Android starts the activity com.android.phone.OutgoingCallBroadcaster because the intent matches the...
Created by Dr. Xi on September 17, 2010 21:29:47 Last update: September 17, 2010 21:31:43
With JBoss (Tomcat?), the servlet container always appends the default charset ISO-8859-1 to the Content-Type header of a JSP response. For example, if you are using JSP to render PDF and put the following declaration at the top of the JSP:
<%@ page contentType="application/pdf"%>These would be the headers in the HTTP response (notice that charset=ISO-8859-1 was appended to Content-Type ):
HTTP/1.1 200 OK Server: Apache-Coyote/1.1 X-...And the output would be truncated a few bytes before non-ASCII characters were encountered, without any error messages ! Maybe you don't intend to output binary files with JSP, but still your response would be truncated without warning if the page happens to contain any non-ASCII characters (when the charset is the default charset=ISO-8859-1 ). However, if you...
Created by Fang on April 01, 2010 22:24:58 Last update: April 02, 2010 02:49:38
In this note I'll show you how to create and package a JSP custom tag. The purpose of this tag is to display a random splash image for a home page, among a set of images. We should be able to add or delete candidate splash images from the WAR archive without the need to change the JSP. This is the intended use of the tag:
<%@ taglib uri="http://custom.tag.com/demo" prefix...In the above example you provide a set of images named splash*.png (e.g., splash1.png, spalsh2.png, ...), and the tag will pick a random one to display when the JSP is rendered. Let's get started. I'll use Maven for this purpose. Create the standard Maven directory structure
./pom.xml ./src ./src/main ./src/main/jav...pom.xml
package tagdemo; import java.util.ArrayList......
Created by Fang on August 13, 2009 02:59:06 Last update: January 09, 2010 23:36:44
Maven requires JAVA_HOME to be set but the setting is tricky. It doesn't like a PATH inside quotes with a space in it.
C:\>@rem quotes and space doesn't work C:\>set ...
Created by Fang on September 07, 2009 16:39:37 Last update: September 07, 2009 18:43:04
It's easiest to use the archetype plugin to start a new Maven project. I'll use struts 1 as example since it's not in the built-in archetypes for archetype:generate . Generate a simple webapp with archetype:generate :
C:\work\maven>mvn archetype:generate -DarchetypeAr...It generates a directory structure like this:
struts1app struts1app/pom.xml struts1app/src...with a simple POM:
<project xmlns="http://maven.apache.org/POM/4.0.0"...Create settings.xml in $HOME/.m2 , add Java.net repository for Java EE dependencies:
<?xml version="1.0" encoding="UTF-8"?> <setting...Add Java EE and Struts dependencies in pom.xml . Note that the Java EE dependency has scope provided , meaning that the web app container provides the jars, therefore we don't need to bundle them with our war fie.
<project xmlns="http://maven.apache.org/POM/4.0.0"...Create a directory named java under main , create the Struts form and...