apache click框架研究

click是apache的一个开源j2ee框架,简单易于配置。官网:http://click.apache.org/

1.下载相应jar包

2.创建一个web工程

3.编写web.xml  如下:

<servlet>

    <servlet-name>ClickServlet</servlet-name>

    <servlet-class>org.apache.click.ClickServlet</servlet-class>

    <load-on-startup>0</load-on-startup>

  </servlet>

  <servlet-mapping>

    <servlet-name>ClickServlet</servlet-name>

    <url-pattern>*.htm</url-pattern>

  </servlet-mapping>

4.在WEB-INF下新建click.xml,内容如下:

<click-app>

<!--包路径(指定为你编写的路径)-->

  <pages package="com.xxx.pages" automapping="true"/>

  <mode value="debug"/>

</click-app>

5.将click所需包导入到工程(如下图)

6.编写helloworld类

public class HelloWorld extends Page{

	
	private static final long serialVersionUID = 1L;

	private ActionLink control=new ActionLink("hello",this,"onClick");
	private ActionLink forward=new ActionLink("forward",this,"onForward");
	
	
	@Override
	public void onInit() {
		this.addModel("time", new Date());
		
		this.addControl(control);
		this.addControl(forward);
		
	}
	//点击“hello”触发,返回消息到页面
	public Boolean onClick(){
		String msg = "this is control listener!";
	        addModel("msg", msg);
		return true;
	}
	//点击“forward”触发,跳转到指定页面
	public Boolean onForward(){
		this.setForward("xxx.htm");
		return true;
	}

}

7.编写helloworld.htm

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>click</title>
</head>
<body>
	now time is:$time
	
	<div>
	<p>$hello.href</p>
	<p>$msg</p>
	
	click <a href="$hello.href">here</a>
	#if ($msg)
    <div> $msg </div>
    #else
    <div>hello world!</div>
  	#end
	</div>
	
	
	click <a href="$forward.href">here</a> to skip
</body>
</html>

 8.将工程部署到tomcat,启动并访问

说明:通过这个例子可以看出,当用户未点击页面的链接时,msg没有值,页面显示“hello world”。当用户点击了链接之后,则会触发定义的onClick函数,为msg赋值并返回给页面,这时页面显示的就是赋给msg的值。

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转载自yaolinnan.iteye.com/blog/1759801
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