Struts2 <s:action>标签示例

package com.h3.common.action;

import com.opensymphony.xwork2.actionsupport;
 
public class actiontagaction extends actionsupport{
	
	public string execute() {
		return success;
	}
	
	public string sayhello(){
		return "sayhello";
	}
	
	public string saystruts2(){
		return "saystruts2";
	}
	
	public string saysysout(){
		system.out.println("sysout sysout sysout");
		return "saysysout";
	}
	
}

2. <s:action>标签示例

下面的jsp页面显示如何使用“action”标签。如果 executeresult=”true”，动作标签被指定方法执行且结果页面将直接显示; 否则，它只是执行的方法，结果页面不会显示出来。

action.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head><title>struts2 action标签示例<title>
</head>
 
<body>
<h1>struts2 action标签示例</h1>

<ol>

<li>
execute the action's result, render the page here. 
<s:action name="sayhelloaction" executeresult="true"/>
</li>

<li>
doing the same as above, but call action's saystruts2() method. 
<s:action name="sayhelloaction!saystruts2" executeresult="true"/>
</li>

<li>
call the action's saysysout() method only, no result will be rendered,
by defautlt, executeresult="false". 
<s:action name="sayhelloaction!saysysout" />
</li>

</ol>

</body>
</html>

sayhello.jsp

<html>
<head>
</head>
 
<body>
<div><div class="ads-in-post hide_if_width_less_800">
<script async  class="lazy" data-original="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- 728x90 - after2ndh4 -->
<ins class="adsbygoogle hide_if_width_less_800" 
     
     data-ad-client="ca-pub-2836379775501347"
     data-ad-slot="3642936086"
	 data-ad-region="h3region"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>
</div></div><h2>hello hello hello ~ from sayhello.jsp</h2>

</body>
</html>

saystruts2.jsp

<html>
<head>
</head>
 
<body>
<h2>struts 2 struts 2 struts 2 ~ from saystruts2.jsp</h2>

</body>
</html>

saysysout.jsp

<html>
<head>
</head>
 
<body>
<h2>sysout sysout sysout ~ from saysysout.jsp</h2>

</body>
</html>

3. struts.xml

声明一些结果名称来演示 executereuslt 的效果。

<?xml version="1.0" encoding="utf-8" ?>
<!doctype struts public
"-//apache software foundation//dtd struts configuration 2.0//en"
"http://struts.apache.org/dtds/struts-2.0.dtd">
 
<struts>
   <constant name="struts.devmode" value="true" />
   <package name="default" namespace="/" extends="struts-default">
	
	<action name="actiontagaction" 
		class="com.h3.common.action.actiontagaction" >
		<result name="success">pages/action.jsp</result>
	</action>
		
	<action name="sayhelloaction" 
		class="com.h3.common.action.actiontagaction" 
                method="sayhello">

		<result name="sayhello">sayhello.jsp</result>
		<result name="saystruts2">saystruts2.jsp</result>
		<result name="saysysout">saysysout.jsp</result>
	</action>
		
  </package>
</struts>

4. 示例

http://localhost:8080/struts2actiontag/actiontagaction.action

在浏览器中打开上面的url，显示结果如下图：

参考

struts2 <s:action>标签文档

代码下载 - http://pan.baidu.com/s/1kt8ntuf

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