JAVA_WEB Struts2学习：Struts2标签学习-优快云博客

本文介绍 Struts2 框架中的标签使用方法及配置技巧，包括解决中文乱码问题、数据自动类型转换与封装等关键特性。通过实例展示了表单元素、数据迭代等功能。

List<String>-----底层就是数组，所以用数组也可以表示：String[]

Struts2数据自动类型转换、封装。

Core核心

每个Struts2标签自成一行，在table下可省略tr，前提是不禁止struts2标签的默认格式生效。

Struts2默认是Post请求。

解决Struts2中文乱码问题：

1.解决Post请求中文乱码：配置Struts2.xml文件。

2.解决Get请求中文乱码：

步骤1：，然后后退到E:\Program Files (x86)\MyEclipse\apache-tomcat-6.0.33\conf下：打开server文件：

修改为：

   		 <Connector port="8080" protocol="HTTP/1.1" 
             		  connectionTimeout="20000" 
             		  redirectPort="8443" URIEncoding="GBK"/>

让Struts2的样式失效：配置Struts2.xml文件：

	<constant name="struts.ui.theme" value="simple"></constant>

以下是Struts2标签的演示代码：

一、index.jsp：

<%@ page language="java" import="java.util.*,com.zuxia.yc42.po.*" pageEncoding="GBK"%>
<%@ taglib uri="/struts-tags" prefix="s" %>

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";


Map<Integer,String> map = new HashMap<Integer,String>();	//HashMap造数据1
map.put(0,"重庆");
map.put(1,"广东");
map.put(2,"深圳");
map.put(3,"成都");
map.put(4,"北京");
map.put(5,"上海");
request.setAttribute("map",map);

List<UserInfo> list = new ArrayList<UserInfo>();			//ArrayList造数据2
UserInfo userInfo1 = new UserInfo();
userInfo1.setUsId(1);
userInfo1.setUsName("小强");
userInfo1.setUsAge(18);
userInfo1.setUsSex("男");

UserInfo userInfo2 = new UserInfo();
userInfo2.setUsId(2);
userInfo2.setUsName("小离");
userInfo2.setUsAge(25);
userInfo2.setUsSex("女");
list.add(userInfo1);
list.add(userInfo2);
request.setAttribute("users",list);
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>'Struts2Taglib.jsp'标签的学习</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
	<style type="text/css">
		.fieldStyle
		{
			height: 100px;
		}
	</style>
  </head>
  
  <body>
  <!-- 
  	EL表达式:${scope.key} ${requestScope.map}
  	OGNL表达:#key / #scope.key  #request.map  
  	#userInfo.usName          #userInfo['usName']
  	
   -->
  	<s:form action="initTest" method="get" namespace="/userManager">
  		<table border="1" width="90%" align="center">
  		
  			<s:textfield name="usName" id="usName" cssStyle="width:200px;" cssClass="fieldStyle" label="用户名" ></s:textfield>
  			<s:password name="usPass" id="usPass" label="密码"></s:password>
  			<s:radio list="#{0:'男',1:'女'}" name="usSex" id="usSex" ></s:radio>
  			<s:checkboxlist list="#request.map" name="usAH"></s:checkboxlist>
  			<s:select list="#request.map" name="usJg"></s:select>
  			
  			<s:textfield name="usAge" id="usAge"label="年龄" ></s:textfield>
  			<s:submit value="提交"></s:submit>
  			<s:reset value="重置"></s:reset>
  			
  		</table>
  		
  	</s:form>
  	
  	
    <form action="myAction">  
    	<s:debug></s:debug>
    	<table>
    		<tr>
    			<th>序号</th>
    			<th>姓名</th>
    			<th>年龄</th>
    			<th>性别</th>
    		</tr>
    		<!-- 
    			JSTL + EL
    			STRUTS2 + OGNL
    		 -->
    		<s:iterator value="#attr.users" var="userInfo" status="status">		<!--迭代数据	:#attr.users可以等价于#request.users		-->
				<tr>
					<td>
						<s:property value="#status.index"/>
					</td>
					<td>                  
						<s:property value="#userInfo.usName"/>
					</td>
					<td>
						<s:property value="#userInfo.usAge"/>
					</td>
					<td>
						<s:if test="usSex == 0">
							男
						</s:if>
						<s:else>
							女
						</s:else>
					</td>
				</tr>
 			</s:iterator>
    	</table>

    	<input type="submit" value="登陆" />
    </form>
  </body>
</html>

二、MyTestAction extends ActionSupport类：

package com.zuxia.yc42.action;

import java.util.List;
import java.util.Set;

import com.opensymphony.xwork2.ActionSupport;
import com.zuxia.yc42.po.UserInfo;


public class MyTestAction extends ActionSupport
{
	//问题1、没有给成员属性编写get/Set方法
	private UserInfo usInfo1;
	//问题2、返回值不是String
	
	private String usName;
	private String usPass;
	private String usSex;
	private Set<String> usAH;
	private String usJg;
	
	private Integer usAge;
	
	public String init()
	{
		System.out.println("INIT方法被调用成功");
		//System.out.println(usInfo1.getUsName());
		return "action";
	}
	
	
	public String query()
	{
		System.out.println("query方法被调用成功");
		//System.out.println(usInfo1.getUsName());
		return "OK";
	}
	
	/**
	 * 默认方法
	 */
	public String execute()
	{
		System.out.println("**************************");
		return "OK";
	}
	public String save_init()
	{
		System.out.println("--------------------");
		return "errors";
	}


	public UserInfo getUsInfo() {
		return usInfo1;
	}


	public void setUsInfo(UserInfo usInfo1) {
		this.usInfo1 = usInfo1;
	}


	public String getUsName() {
		return usName;
	}


	public void setUsName(String usName) {
		this.usName = usName;
	}


	public String getUsPass() {
		return usPass;
	}


	public void setUsPass(String usPass) {
		this.usPass = usPass;
	}


	public String getUsSex() {
		return usSex;
	}


	public void setUsSex(String usSex) {
		this.usSex = usSex;
	}



	public UserInfo getUsInfo1() {
		return usInfo1;
	}


	public void setUsInfo1(UserInfo usInfo1) {
		this.usInfo1 = usInfo1;
	}





	public Integer getUsAge() {
		return usAge;
	}


	public void setUsAge(Integer usAge) {
		this.usAge = usAge;
	}


	public Set<String> getUsAH() {
		return usAH;
	}


	public void setUsAH(Set<String> usAH) {
		this.usAH = usAH;
	}


	public String getUsJg() {
		return usJg;
	}


	public void setUsJg(String usJg) {
		this.usJg = usJg;
	}
	
	
}

三、struts.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "struts-2.1.dtd" >
<struts>
	<!-- 常量配置 -->
	
	<!-- 定义字符集编码 -->   
	<constant name="struts.i18n.encoding" value="GBK"></constant>  	 <!-- 解决Post请求中文乱码	-->

	<!-- 禁止struts2标签的默认格式生效 
	<constant name="struts.ui.theme" value="simple"></constant>-->
	
	
	<package name="testManager" extends="struts-default" namespace="/userManager">
		<!-- 请求找不到Action时 默认调用该Action -->
		<default-action-ref name="defaultAction"></default-action-ref>
		
		<!-- 全局的返回路径 -->
		<global-results>
			<result name="errors">/error.jsp</result>
		</global-results>
		
		<action name="testAction" class="com.zuxia.yc42.action.MyTestAction" method="init">
			<result name="OK">/MyJsp.jsp</result>
			<result name="error">/index.jsp</result>
		</action>
		<action name="myAction" class="com.zuxia.yc42.action.MyTestAction" method="query">
			<result name="OK" >/MyJsp1.jsp</result>
			<result name="error">/index.jsp</result>
		</action>
		
		<action name="myTestAction" class="com.zuxia.yc42.action.MyTestAction">
			<result name="OK">/MyJsp1.jsp</result>
			<result name="error">/index.jsp</result>
		</action>
		
		<action name="*Test" class="com.zuxia.yc42.action.MyTestAction" method="{1}">
			<result name="OK">/MyJsp1.jsp</result>
			<result name="error">/index.jsp</result>
			<result name="action" type="chain">
				<param name="namespace">/userManager</param>
				<param name="actionName">usManager</param>
				<param name="method">modifyInfo</param>
			</result>
		</action>
		
		<action name="usManager" class="com.zuxia.yc42.action.UserManagerAction" >
			<result name="success">/jsp/userManager/regUserInfo.jsp</result>
		</action>
		
		<action name="defaultAction">
			<result>/error.jsp</result>
		</action>
	</package>
	
	<package name="testManager1" extends="struts-default" namespace="/testManager">
		<action name="testAction" class="com.zuxia.yc42.action.MyTestAction" method="init">
			<result name="OK">/MyJsp.jsp</result>
			<result name="error">/index.jsp</result>
		</action>
		<action name="myAction" class="com.zuxia.yc42.action.MyTestAction" method="query">
			<result name="OK" >/MyJsp1.jsp</result>
			<result name="error">/index.jsp</result>
		</action>
		
		<action name="myTestAction" class="com.zuxia.yc42.action.MyTestAction">
			<result name="OK">/MyJsp1.jsp</result>
			<result name="error">/index.jsp</result>
		</action>
		
		<action name="usManager" class="com.zuxia.yc42.action.UserManagerAction" >
			<result name="success">/jsp/userManager/regUserInfo.jsp</result>
		</action>
	</package>
</struts>