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struts2验证用户是否登陆

2017-02-16 00:00 375 查看

login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>

<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="loginaction" method="post">
<center>
<h2>用户登录</h2>
${loginerror}
用户:<input type="text" name="username"><br><br>

密码:<input type="password" name="password"><br><br>
<input type="submit" value="提交">
</center>

</form>
</body>
</html>

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">

<struts>
<package name="default" namespace="/" extends="struts-default">

<interceptors>
<interceptor name="validate" class="com.validate.lan.AuthorIntercept"></interceptor>
</interceptors>
<action name="author">
<result>/login.jsp</result>
<result name="login">/login.jsp</result>

<!-- 引用拦截器 -->

<interceptor-ref name="defaultStack"></interceptor-ref>

<interceptor-ref name="validate"></interceptor-ref>

</action>
<action name="loginaction" class="com.validate.action.LoginAction" method="login">
<result name="success">/manager.jsp</result>
<result name="error">/login.jsp</result>

</action>
</package>

</struts>

3LoginAction.java

package com.validate.action;

import java.util.Map;

import javax.jms.Session;

import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport implements SessionAware{
private String username;
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;
}

private String password;

private Map<String,Object> session;

public void setSession(Map<String, Object> session) {
this.session=session;
}

public String login(){
if("123".equals(username)&&"123".equals(password)){
session.put("logininfo", username);
return SUCCESS;
}else{
session.put("loginerror", "用户名或密码错误");
return ERROR;
}
}

}

4 AuthorIntercept.java

package com.validate.lan;

import java.util.Map;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class AuthorIntercept extends AbstractInterceptor {

@Override
public String intercept(ActionInvocation invocation) throws Exception {
ActionContext context=ActionContext.getContext();
Map<String,Object> session=context.getSession();
if(session.get("logininfo")!=null){
String result=invocation.invoke();
return result;
}else{
return "login";
}

}

}

5 小知识自定义拦截器栈

<interceptors>

<interceptor name="validate" class="com.validate.lan.AuthorIntercept"></interceptor>

<interceptor-stack name="mystack">

<interceptor-ref name="validate"></interceptor-ref>

<interceptor-ref name="defaultStack"></interceptor-ref>

</interceptor-stack>

</interceptors>

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