标签：struts
最近看了一下struts，很久都没有用了，回顾了一下，strust主要的作用就是起到一个请求分发的作用，将前端不同请求交给不同的action处理，并将这些处理的结果返回给前端进行显示。这是我对strust一点简单的理解。
下面是一些简单的代码
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>AllTest</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!-- 配置Struts2的前端控制器 -->
<filter>
<filter-name>
struts2
</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>
struts2
</filter-name>
<url-pattern>
/*
</url-pattern>
</filter-mapping>
</web-app>struts.xml配置文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
"http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts>
<package name="login" namespace="/novel" extends="struts-default">
<!-- 拦截器 -->
<interceptors>
<interceptor name="firstInterceptor" class="struts.test.FirstIntceptor"></interceptor>
<interceptor name="SecondInterceptor" class="struts.test.SecondIntceptor"></interceptor>
<interceptor-stack name="interceptorStack">
<interceptor-ref name="firstInterceptor"></interceptor-ref>
<interceptor-ref name="SecondInterceptor"></interceptor-ref>
<interceptor-ref name="defaultStack"></interceptor-ref>
</interceptor-stack>
</interceptors>
<action name="login" class="struts.test.LoginAction" method="login">
<interceptor-ref name="interceptorStack"></interceptor-ref>
<result name="error">/user/login.jsp</result>
<result name="success">/index.jsp</result>
</action>
</package>
</struts>登陆页面login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="GBK" contentType="text/html;charset=GBK"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK" />
<title>无线活动录入后台</title>
<link href="http://js.soufunimg.com/wireless_m/touch/css/ztback.css" rel="stylesheet" type="text/css"/>
<script src="http://js.soufunimg.com/wireless_m/touch/js/jquery.js"></script>
</head>
<body>
<div class="wrap" style="width:330px; height:140px; margin-top:200px; border:1px solid #A2A2A2;-moz-border-radius:6px; -webkit-border-radius:6px; border-radius:6px;box-shadow: 0 0 8px #A2A2A2; -webkit-box-shadow:0 0 8px #A2A2A2; -moz-box-shadow:0 0 8px #A2A2A2; padding:20px">
<!--
action中的“/novel/login/login”,novel对应struts.xml中的package的namespace的值
login对应struts.xml中的action的name的值
-->
<form class="loginForm" action="/novel/login" method="post">
<table width="100%" height="${empty param.username_change?80:120}" border="0" cellspacing="0" >
<tr>
<td width="13%">账号</td>
<td width="87%"><input id="userName" name="userName" type="text" class="loginput" value=""/></td>
</tr>
<tr>
<td>密码</td>
<td><input id="password" name="password" type="password" class="loginput"/></td>
</tr>
<tr>
<td></td><td id="warn" class="loginput" style="display:none;color:red">用户名或密码错误</td>
</tr>
</table>
<input id="submit" type="submit" class="pindbarbtn ablack" style="width:60px;margin-left:auto; margin-right:auto; text-align:center; margin-top:8px; margin-bottom:8px" value="登录"></input>
</form>
<div>
</div>
<div>
<label></label>
</div>
</div>
<script type="text/javascript">
var status = "${requestScope.status}";
if(status=="error"){
$("#warn").show();
}
</script>
</body>
</html>
package struts.test;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
public class LoginAction {
private String userName;
private String password;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String checkLogin(){
HttpServletRequest request = ServletActionContext.getRequest();
if("wangbiao".equals(userName)&&"654321".equals(password)){
request.setAttribute("hello", password );
request.setAttribute("status", "success");
return "success";
}else{
request.setAttribute("status", "error");
return "error";
}
}
}
package struts.test;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;
public class FirstIntceptor implements Interceptor {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void init() {
// TODO Auto-generated method stub
}
@Override
public String intercept(ActionInvocation arg0) throws Exception {
// TODO Auto-generated method stub
System.out.println("我是第一个拦截器,action执行之前拦截");
arg0.invoke();
System.out.println("我是第一个拦截器,action执行之后拦截");
return null;
}
}
package struts.test;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
import org.xml.sax.SAXException;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;
public class SecondIntceptor implements Interceptor{
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void init() {
// TODO Auto-generated method stub
}
@Override
public String intercept(ActionInvocation invocation) throws Exception {
// TODO Auto-generated method stub
Map<String, Object> paramMap = invocation.getInvocationContext().getParameters();
/**
* 拦截器获取页面传过来的值
*/
String[] usernameArr = (String[])paramMap.get("userName");
String[] passwordArr = (String[])paramMap.get("password");
System.out.println("我是第二个拦截器，action执行之前拦截");
System.out.println("用户名:"+usernameArr[0]+"密码:"+passwordArr[0]);
if("123456".equals(passwordArr[0])){
return "success";
}else{
//就是调用相应的action
invocation.invoke();
System.out.println("我是第二个拦截器,action执行之后拦截");
}
return null;
}
}
<%@ page language="java" contentType="text/html; charset=gbk"
pageEncoding="gbk"%>
<!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=gbk">
<title>Insert title here</title>
</head>
<body>
<h1>登陆成功</h1>
<!-- 用el表达式获取登陆页传来的用户名和密码 -->
<label>账号:${userName}</label>
<label>密码:${password}</label>
</body>
</html>版权声明：本文为博主原创文章，未经博主允许不得转载。
标签：struts
原文地址：http://blog.csdn.net/wangbiao007/article/details/47058877
