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Struts2自定义拦截器实例—登陆权限验证

2014-07-15 22:17 411 查看

学习收藏，本文转自：http://blog.csdn.net/java_cxrs/article/details/5514340，所有权利归原作者所有。

版本：struts2.1.6

此实例实现功能：用户需要指定用户名登陆，登陆成功进入相应页面执行操作，否则返回到登陆页面进行登陆，当直接访问操作页面（登陆后才能访问的页面）时则不允许，须返回登陆页面。

代码如下：

一、页面

login.jsp

[xhtml] view
plaincopy

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>yuewei'Login</title>



</head>

<body>

<form action="login.action" method="post">

User:<input type="text" name="username"><br>

Passoword:<input type="password" name="password"><br>

<input type="submit" value="submit">

</form>

</body>

</html>

welcome.jsp

[xhtml] view
plaincopy

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title> yuewei's Welcome</title>



</head>

<body>

<h1>登录成功后显示此页面</h1>

<a href="show.action" mce_href="show.action">show</a>

</body>

</html>

show.jsp

[xhtml] view
plaincopy

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>yuewei's Show</title>



</head>

<body>

Show This Page

登录后执行此页面<br>

</body>

</html>

二、Action

LoginFormAction

[java] view
plaincopy

package com.ywjava.action;

import com.opensymphony.xwork2.ActionSupport;

public class LoginFormAction extends ActionSupport {

public String exexcute() {

return "success";

}

}

LoginAction

[java] view
plaincopy

package com.ywjava.action;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionSupport;

import com.ywjava.utils.Constants;

public class LoginAction extends ActionSupport{

private String username;

private String password;

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

private boolean isInvalid(String value) {

return (value == null || value.length() == 0);

}

public String execute(){

System.out.println(username);

System.out.println(password);

if (isInvalid(getUsername()))

return INPUT;

if (isInvalid(getPassword()))

return INPUT;

if(this.getUsername().equals("yuewei")&& this.getPassword().equals("yuewei")){

ActionContext.getContext().getSession().put(Constants.USER_SESSION,getUsername());

ActionContext.getContext().getSession().put(Constants.PASS,getPassword());

return "success";

}

return "error";

}

}

ShowAction

[java] view
plaincopy

package com.ywjava.action;

import com.opensymphony.xwork2.ActionSupport;

public class ShowAction extends ActionSupport {

public String execute() {

return "success";

}

}

三、拦截器

[java] view
plaincopy

package com.ywjava.interceptot;

import java.util.Map;

import com.opensymphony.xwork2.Action;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionInvocation;

import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

import com.ywjava.utils.Constants;

public class LoginInterceptor extends AbstractInterceptor {

@Override

public String intercept(ActionInvocation invocation) throws Exception {

// 取得请求相关的ActionContext实例

ActionContext ctx = invocation.getInvocationContext();

Map session = ctx.getSession();

String user = (String) session.get(Constants.USER_SESSION);

// 如果没有登陆，或者登陆所有的用户名不是yuewei，都返回重新登陆

if (user != null && user.equals("yuewei")) {

System.out.println("test");

return invocation.invoke();

}

ctx.put("tip", "你还没有登录");

return Action.LOGIN;

}

}

四 struts.xml

[c-sharp] view
plaincopy

<?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="authority" extends="struts-default">



<interceptors>

<interceptor name="authority"

class="com.ywjava.interceptot.LoginInterceptor">

</interceptor>



<interceptor-stack name="mydefault">

<interceptor-ref name="defaultStack" />

<interceptor-ref name="authority" />

</interceptor-stack>

</interceptors>



<global-results>



<result name="login">/login.jsp</result>

</global-results>

<action name="loginform"

class="com.ywjava.action.LoginFormAction">

<result name="success">/login.jsp</result>

</action>

<action name="login" class="com.ywjava.action.LoginAction">

<result name="success">/welcome.jsp</result>

<result name="error">/login.jsp</result>

<result name="input">/login.jsp</result>

</action>

<action name="show" class="com.ywjava.action.ShowAction">

<result name="success">/show.jsp</result>



<interceptor-ref name="mydefault" />

</action>

</package>

</struts>

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