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使用Struts实现简单的登陆

2017-09-28 17:30 387 查看

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"> 
<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
@SuppressWarn
4000
ings("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 name="user" extends="struts-default" namespace="/">

<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>

<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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