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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 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 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 James on July 19, 2009 20:51:23 Last update: January 11, 2011 20:14:18
If CSS3 border-image is properly supported, making a rounded corner box is very easy. You just need a round corner image like this: The following markup:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" ...would render like this (try it in Firefox 3.5 and Google Chrome): However, IE as of version 8.0 does not support border-image . So until border-image is reliably supported in all major browsers, we still have to rely on tried and true tricks to make it work. In general, I found three general categories of tricks to make rounded corners: Good old tables. This trick creates a table of 9 cells and uses the 8 cells on the perimeter to render the borders and rounded corners. The central cell is used for...
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 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...
Created by Fang on August 17, 2010 19:27:32 Last update: August 17, 2010 19:27:32
Get the length of a collection The length function returns the size of a collection. It can be applied to any object supported by the JSTL core tag <c:forEach> , namely: Arrays Implementation of java.util.Collection Implementation of java.util.Iterator Implementation of java.util.Enumeration Implementation of java.util.Map String When used on String , it returns the number of characters in the string. Test it Make these additions to the expanded test application : Create a new Java class LengthFunction :
package jstl.demo.handler; import java....Create a new JSP ( lengthfunction.jsp ) under webapp :
<%@ taglib uri="http://java.sun.com/jsp/jstl/c...Compile and package the WAR with: mvn package Deploy the WAR to a servlet container of your choice (for example, Tomcat or JBoss). Test the page with this URL...
Created by Dr. Xi on August 03, 2010 16:29:35 Last update: August 03, 2010 16:36:50
This utility converts unicode escape strings in a file to UTF-8 encoded. Suppose you received a properties file with contents like:
# @(#)codepoint_zh_CN.properties 1.4 05/09/27 #...You can use this utility to convert it to UTF-8 and view or edit.
import java.io.*; /** * Reads file with...This utility is equivalent to:
native2ascii -reverse -encoding utf-8using the standard Java native2ascii utility.
Created by voodoo on July 11, 2009 15:14:55 Last update: July 29, 2010 22:45:48
cURL is a command line tool for transferring files with URL syntax. The main purpose and use for cURL is to automate unattended file transfers or sequences of operations. It's really easy to see HTTP headers with curl:
C:\>curl --head http://www.google.com HTTP/1.0 ...or, headers and page together (dump headers to stdout):
$ curl --dump-header - http://www.google.com HTTP/...Download openssl from openssl.org:
C:\>curl --help Usage: curl [options...] <url> ...
Created by nogeek on April 25, 2010 05:09:14 Last update: April 25, 2010 05:10:46
Oracle Web Cache version used:
Oracle Application Server Web Cache 10.1.2.3.0 ...The test page is a simple Struts action sending a URL redirect:
public ActionForward execute(ActionMapping map...Web Cache setup Origin server Host Name Port oas.host 7777 Site Host Name Port URL Path Prefix webcache.host 80 Test results Request directly to the OC4J (Oracle Application Server):
C:\work\testAppWebApp2>curl --dump-header - http:/...Request to Oracle Web Cache:
C:\work\testAppWebApp2>curl --dump-header - http:/...Notice that Oracle Web Cache correctly translated the host name in the header and HTML page. However, the port number remained that of the Oracle App Server.
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......