struts2 <s:if>, <s:elseif>, <s:else>标签示例用于执行基本的条件检查。这里创建一个web工程：strut2iftag，来演示在多个复选框如何设置的默认值，整个项目的结构如下图所示：
<s:if test="%{#variable=='string 1'}">
this is string 1
</s:if>
或使用 <s:elseif> 标签
<s:if test="%{#variable=='string 1'}">
this is string 1
</s:if>
<s:elseif test="%{#variable=='string 2'}">
this is string 2
</s:elseif>
<s:if test="%{#variable=='string 1'}">
this is string 1
</s:if>
<s:elseif test="%{#variable=='string 2'}">
this is string 2
</s:elseif>
<s:else>
other strings
</s:else>
iftagaction
package com.h3.common.action;
import com.opensymphony.xwork2.actionsupport;
public class iftagaction extends actionsupport{
private string framework = "struts 2";
public string getframework() {
return framework;
}
public void setframework(string framework) {
this.framework = framework;
}
public string execute() {
return success;
}
}
if.jsp
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
</head>
<body>
<h1>struts 2 if, else, elseif tag example</h1>
<s:set name="webframework" value="framework"/>
<s:if test="%{#webframework=='struts 2'}">
this is struts 2
</s:if>
<s:elseif test="%{#webframework=='struts 1'}">
this is struts 1
</s:elseif>
<s:else>
other framework
</s:else>
</body>
</html>
<?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="iftagaction" class="com.h3.common.action.iftagaction" > <result name="success">pages/if.jsp</result> </action> </package> </struts>
http://localhost:8080/struts2iftag/iftagaction.action
