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Created by Fang on January 28, 2012 13:24:09 Last update: January 28, 2012 13:31:22
This is a simple JSP custom tags library with tag body. Just like the JSF counterpart , it splits a string and repeats the body for each word, i.e., with this markup:
<%@ taglib uri="http://custom.tag.com/demo" prefix...output:
<html> <body> <p>Hello Tigger!</p> <p>H...With Maven, this is the directory structure:
./src ./src/main ./src/main/resources ./s...There are three files to write: pom.xml :
<project xmlns="http://maven.apache.org/POM/4.0.0"...src/main/java/tagdemo/IterateTag.java :
package tagdemo; import java.io.IOException...src/main/resources/META-INF/demotag.tld :
<?xml version="1.0" encoding="UTF-8"?> <!DO...Build with:
mvn clean installTo use it as a dependency in other Maven projects:
<dependency> <groupId>tag-demo</groupId> ...
Created by Fang on December 06, 2011 19:03:25 Last update: December 07, 2011 08:54:11
Our custom tag, as implemented in the previous note , is broken when a template is used. Create a template file ( home-template.xhtml ):
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Stric...and a test page that uses it ( home.xhtml ):
<?xml version="1.0" encoding="UTF-8"?> <ui:comp...Then request the page with URL: http://localhost:8080/facelet-demo/home.jsf?name=Jack . You'll find that our hello tag works inside ui:repeat but fails to get the value defined by ui:param ! What's the problem? Our hello tag implementation evaluated the EL with the wrong EL context! This is the corrected implementation:
package com.example; import java.io.IOExcep...
Created by Fang on November 08, 2011 20:55:00 Last update: November 21, 2011 18:19:44
In the simple taglib example , I used a tag handler class to implement a taglib. This is an example to implement a taglib with a UI component. The purpose is to use a custom tag to split a string and print each part in a separate paragraph, i.e., print
<p>john</p> <p>steve</p> <p>mike</p>with custom tag <my:foreach> :
<my:foreach var="who" value="john steve mike"> ...These are the files: pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"...src/main/java/com/example/UIForeash.java :
package com.example; import java.io.IOExcep...src/main/resources/META-INF/faces-config.xml :
<?xml version="1.0" encoding="UTF-8"?> <faces-c...src/main/resources/META-INF/foreach.taglib.xml :
<?xml version="1.0" encoding="UTF-8"?> <facelet...How to use: Put the JAR file generated by the above project in the WEB-INF/lib folder of the web app. If the web app is a Maven project, just add the taglib project as a dependency:...
Created by Dr. Xi on November 11, 2011 10:05:22 Last update: November 11, 2011 10:12:01
This is an HTML image tag filter using Java regex. It takes a string, finds the img tags, replaces the src attribute with one provided by the filter, then adds a class name to the class attribute.
import java.util.regex.*; import java.io.*; ...Test file:
<div id="HTML snippet"> <img src="img/big/txt-m...
Created by Fang on November 03, 2011 19:47:38 Last update: November 08, 2011 20:24:47
This is a step-by-step example to create a really simple facelet taglib (in JSF 2 with Maven). Create a simple Maven project with:
mvn archetype:create -DgroupId=com.example -Dartif...Three files are created as a result: pom.xml src/main/java/com/example/App.java src/test/java/com/example/AppTest.java This project should be able to build with:
mvn packageAdd facelet API dependencies to pom.xml :
<project xmlns="http://maven.apache.org/POM/4....The compiler plugin section is optional. Remove src/main/java/com/example/App.java , create a new Java class as the facelet Tag Handler ( HelloTagHandler.java ):
package com.example; import java.io.IOExcep...This tag handler simply prints a "Hello" message. Create facelet tag declaration file src/main/resources/META-INF/hello.taglib.xml :
<?xml version="1.0" encoding="UTF-8"?> <facelet...Build the JAR with
mvn clean packageOptionally, install it to the local repository:
mvn installTo use the taglib, simply drop the...
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 nogeek on November 04, 2010 20:00:15 Last update: November 05, 2010 14:38:43
Following are some bugs in the Xalan jar shipped with JBoss 5.1.0 GA and JBoss 6.0. The Xalan jar file is located in jboss-5.1.0.GA/lib/endorsed ( %JBOSS_HOME%/common/lib for JBoss 6.0). Test xml:
<?xml version="1.0" encoding="ISO-8859-1"?> ...Test xsl:
<?xml version="1.0" encoding="ISO-8859-1"?> <xs...XSLT Java code:
import org.w3c.dom.*; import javax.xml.parsers....DateUtil.java
import java.util.Date; public class DateUti...XSLT output:
Transformer Factory class: class org.apache.xalan....Apparently, the output is wrong. The string "A test event" should not have been displayed.
Created by Fang on August 10, 2010 21:37:36 Last update: October 25, 2010 20:18:47
The tags <fmt:formatNumber> Format a numeric value as number , currency or percentage - controlled by the type attribute (defaults to number if type is missing). Syntax:
<fmt:formatNumber value="numericValue" [type="...Attributes: Name Dynamic? Type Description value true String or Number Numeric value to be formatted. type true String Specifies whether the value is to be formatted as number, currency, or percentage. pattern true String Custom formatting pattern, must follow the pattern syntax specified by the class java.text.DecimalFormat . currencyCode true String ISO 4217 currency code. Applied only when formatting currencies (i.e. if type is equal to "currency"); ignored otherwise. currencySymbol true String Currency symbol. Applied only when formatting currencies (i.e. if type is equal to "currency"); ignored otherwise. It is used only when currencyCode is...
Created by Fang on August 24, 2010 18:44:24 Last update: August 24, 2010 18:44:24
The tags XML transform tags apply XSLT to XML documents. The XML document may be specified as the doc attribute or enclosed as the body of the <x:transform> tag. Optional <x:param> tags may be used to specify parameters for the XSLT. <x:transform> Syntax:
<x:transform doc="XMLDocument" xslt="XSLTStyle...or, include the XML document in the body:
<x:transform xslt="XSLTStylesheet" [docSystem...Attributes: Name Dynamic? Type Description doc true String , Reader , javax.xml.transform.Source , org.w3c.dom.Document , or object exported by <x:parse> , <x:set> . Source XML document to be transformed. (If exported by <x:set> , it must correspond to a well-formed XML document, not a partial document.) xslt true String , Reader or javax.xml.transform.Source Transformation stylesheet as a String , Reader , or Source object. docSystemId true...
Created by Fang on August 23, 2010 22:55:58 Last update: August 24, 2010 15:45:04
The tags XML flow control tags are exactly the same as their Core flow control equivalents, except that the test condition with a boolean EL expression is replaced by the select condition with an XPath expression. In the case of the forEach tag, the items attribute is replaced with the select attribute. In a test condition, the XPath expression is evaluated to a boolean value by the rules of the XPath boolean() function, which converts its argument to a boolean as follows: a number is true if and only if it is neither positive or negative zero nor NaN. a node-set is true if and only if it is non-empty. a string is true if and only if its length is non-zero. an object of...