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Struts2的一个简单入门例子

2014-08-22 13:54 225 查看
default.jsp

<%@ taglib uri="/struts-tags" prefix="s" %>
<%@ 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>
<title>首页</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">
</head>
<body>
<s:form action="login!execute.action" method="post">
<s:label value="系统登陆"></s:label>
<s:textfield name="username" label="账号" />
<s:password name="password" label="密码" />
<s:submit value="登录" />
</s:form>
</body>
</html

struts.xml

<struts>
<!-- 动态地调用方法 -->
<constant name="struts.enable.DynamicMethodInvocation" value="true"></constant>
<package name="default" extends="json-default">

<action name="login" class="com.hik.user.LoginAction">
<result name="success">/welcome.jsp</result>
<result name="login">/default.jsp</result>
</action>

<action name="UserLogin" class="com.hik.user.UserLoginAction">
<result type="json"></result>
</action>

<!--
<action name="login" class="com.hik.user.LoginAction" method="execute">
<result name="success">/welcome.jsp</result>
<result name="login">/default.jsp</result>
</action>
-->
</package>

</struts>

LoginAction.java

package com.hik.user;
import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport {
private static final long serialVersionUID = 1L;
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;
}

@Override
public String execute() throws Exception {
if("admin".equals(username) && "12345".equals(password))//如果登录的用户名=haha并且密码=hehe，就返回SUCCESS；否则，返回LOGIN
return SUCCESS;
return LOGIN;
}
}

welcome.jsp

<%@ 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>
<title>My JSP 'welcome.jsp' starting page</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">
</head>

<body>
欢迎${username }！
</body>
</html>

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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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>MyProject</display-name>

<servlet>
<description></description>
<display-name>extLogin</display-name> <!-- extJS对应的servlet服务 -->
<servlet-name>extLogin</servlet-name>
<servlet-class>com.hik.user.Login</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>extLogin</servlet-name>
<url-pattern>/extLogin</url-pattern>
</servlet-mapping>

<!-- Struts2 filter -->
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
<init-param>
<param-name>struts.action.extension</param-name>
<param-value>action,php</param-value>  <!-- 设置拦截对象类型 -->
</init-param>
</filter>

<!--     <filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping> -->

<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.action</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.php</url-pattern>
</filter-mapping>

<welcome-file-list>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>

</web-app>
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