使用Struts实现简单的登陆

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引入jar包

文件结构图如下:

首先在web.xml文件中设置核心过滤器

<?xml version="1.0" encoding="UTF-8"?><web-app version="3.0"    xmlns="http://java.sun.com/xml/ns/javaee"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"><!-- 引入struts核心过滤器 --><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>

然后创建一个实体类对象User,省略getter和setter方法

private String userName;private String pwd;

然后写对应的UserAction类继承ActionSupport方法

package cn.qblank.excute;import java.util.Map;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings("serial")public class UserAction extends ActionSupport {private User user = new User();public void setUser(User user) {this.user = user;}public User getUser() {return user;}//登陆public String login() {if ("admin".equals(user.getUserName()) && "123".equals(user.getPwd())) {//将数据存入域中ActionContext ac = ActionContext.getContext();//获取request的Map集合Map<String, Object> request = ac.getContextMap();//获取session的Map集合@SuppressWarnings("unused")Map<String, Object> session = ac.getSession();//获取ServletContext的Map集合@SuppressWarnings("unused")Map<String, Object> application = ac.getApplication();//request域中存储数据request.put("req_username", user.getUserName());request.put("req_pwd", user.getPwd());return "success";}else{return "loginFiled";}}}

在同级目录中写下config.xml进行配置

<?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><!-- package   定义一个包。 包作用，管理action。   (通常,一个业务模板用一个包)   name  包的名字； 包名不能重复；   extends 当前包继承自哪个包      在struts中，包一定要继承struts-default     struts-default在struts-default.xml中定的包abstract       表示当前包为抽象包； 抽象包中不能有action的定义，否则运行时期报错    abstract=true  只有当当前的包被其他包继承时候才用！    如：    <package name="basePackage" extends="struts-default" abstract="true"></package>   <package name="user" extends="basePackage">   namespace   名称空间，默认为"/"      作为路径的一部分         访问路径=  http://localhost:8080/项目/名称空间/ActionNameaction   配置请求路径与Action类的映射关系     name  请求路径名称     class 请求处理的aciton类的全名     method 请求处理方法result     name  action处理方法返回值      type  跳转的结果类型       标签体中指定跳转的页面 --><!-- 子配置文件 --><package name="user" extends="struts-default" namespace="/"><!-- 动作 --><action name="login" class="cn.qblank.excute.UserAction" method="login"><result name="success">/success.jsp</result><result name="loginFiled">/loginFiled.jsp</result></action></package></struts>

在主配置文件中引入config.xml文件

<?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><!-- 总配置文件 负责引入各个子配置文件 --><include file="cn/qblank/excute/config.xml"></include></struts>

对应的登陆界面login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <title>login</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>   <form action="${pageContext.request.contextPath }/login" name="frmLogin"  method="post">      用户名： <input type="text" name="user.userName"> <br/>    密码： <input type="text" name="user.pwd"> <br/>      <input type="submit" value="登陆"> <br/>   </form>  </body></html>

登陆成功界面success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">    <title>访问成功</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><h3>访问成功</h3>欢迎 ${user.userName}来到本页面!!!  </body></html>

登陆失败界面loginFiled.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">        <title>My JSP 'loginFiled.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>  <h3>登陆失败</h3>  </body></html>

登陆成功:

登陆失败:

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