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Created by Fang on January 10, 2010 00:19:30
Last update: January 31, 2012 16:28:42
Maven is a powerful yet complex tool. When I started learning Maven, the first obstacle was, of course, its complexity. The second, was the lack of documentation that can get me off the ground quickly. This tutorial is an attempt to create a pragmatic guide that aims to get you familiar with Maven in the quickest way possible. The main theme is to get you on some hands on experience to start out and lead you through the creation of a simple Java EE project as quickly as possible. Instead of trying to give you a good read, I try to get you on the journey right away. The topics are roughly ordered by the logical sequence but you can jump around in any way...
Created by Fang on January 31, 2012 16:27:39
Last update: January 31, 2012 16:27:39
Because Maven dependencies are transitive, the same artifact may be brought in with different version numbers by multiple other dependencies. For example, the current project may depend on artifact A, which in turn depends on artifact C version 1. It may also have immediate dependency on artifact B, which in turn depends on artifact C version 2. Maven resolves these version conflicts in the following ways: Dependency Mediation : If a specific version is not declared in your project POM, Maven resolves the version number by nearest definition , which means it will use the closest dependency in the tree of dependencies for the current project. When dependency depth is the same, it will pick the one that appeared in the POM first. Dependency Management...
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 package
The resulting webapp is target/springmvc.war .
Created by Fang on January 31, 2012 13:57:56
Last update: January 31, 2012 15:04:29
These are the minimum steps to configure Spring MVC in web.xml :
Bootstrap Spring MVC by registering ContextLoaderListener :
<listener>
<listener-class>
org.springfra...
Register the DispatcherServlet :
<servlet>
<servlet-name>spring</servlet-name>
...
Add servlet-mapping :
<servlet-mapping>
<servlet-name>spring</servle...
Configure DispatcherServlet with WEB-INF/spring-servlet.xml , which configures WebApplicationContext specific to this servlet.
<?xml version="1.0" encoding="UTF-8"?>
<beans x...
Optionally, use context-param in web.xml to configure the global WebApplicationContext :
<!-- XmlWebApplicationContext is the default, so t...
If you omit this section, you have to create file WEB-INF/applicationContext.xml , even if it's empty.
This is the full web.xml :
<?xml version="1.0" encoding="UTF-8"?>
<web-app...
Created by magnum on January 30, 2012 18:13:52
Last update: January 30, 2012 18:13:52
There are two ways you cat get the name of a host from its ip address: getnameinfo and gethostbyaddr . The former is IPV6 compatible.
Using getnameinfo :
#include <sys/types.h>
#include <sys/socket.h>
...
Using gethostbyaddr :
#include <sys/types.h>
#include <sys/socket.h>
...
Created by James on January 30, 2012 10:39:33
Last update: January 30, 2012 10:39:33
The qTip tooltip hides when mouse is off the target but on the tooltip itself. This makes it hard to click links in the tooltip - when you try to click the link, it disappears. Add the " fixed: true " flag to prevent it from disppearing:
<script type="text/javascript">
$(function() {
...
Created by James on March 11, 2011 08:53:31
Last update: January 30, 2012 09:33:56
Both delegate and live allow you to bind event handlers to elements created in the future, but there are some differences: For .delegate , the event bubbles up to the element on which it is called. For .live , the event bubbles up to the root of the DOM tree, or, as of jQuery 1.4, optionally stop at a DOM element context. DOM traversal methods are not supported for finding elements to send to .live() . Rather, the .live() method should always be called directly after a selector. The opposite of .live is .die . The opposite of .delegate is .undelegate . Note: As of jQuery 1.7, the .live() method is deprecated . Use .on() to attach event handlers. Users of older versions of jQuery...
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 install
To use it as a dependency in other Maven projects:
<dependency>
<groupId>tag-demo</groupId>
...
Created by James on January 27, 2012 12:38:53
Last update: January 27, 2012 12:39:46
A brief summary of jQuery DOM manipulation methods for reference.
.before() and .insertBefore() : insert content before target element - as sibling.
Examples:
// insert summary before details
$('#detail').b...
.after() and .insertAfter() : insert content after target element - as sibling.
Examples:
// insert details after summary
$('#summary').a...
.prepend() and .prependTo() : insert content as first child of target element.
Examples:
// prepend caption to table
$('table').prepend(...
.append() and .appendTo() : insert content as last child of target element.
Examples:
// append row to table
$('table').append('<tr><...
Created by James on January 26, 2012 21:23:56
Last update: January 26, 2012 21:23:56
In an HTML page, elements can overlap because of position styles. When there's an overlap, elements coming later in the HTML code are displayed on the top. This can be altered by specifying z-index in the CSS. Elements with higher z-index are placed on the top.
However , z-index only works for elements that are not static positioned. Static positioned elements are always at the bottom compared to relative , fixed and absolute positioned elements.
This is a test page:
<!DOCTYPE html>
<html>
<head>
<style t...
Effects of z-index can be tested by adding it to the elements, for example:
<div id="bg" class="big" style="z-index: 3"></div>...
