20160501--struts2入门3

package com.dzq.action;

public class HelloWorldAction {
    private String message;

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
    
    
    public String addUI(){
        this.message="addUI";
        return "success";
    }
    
    public String execute() {
        this.message="execute";
        return "success";
    }
}

package com.dzq.interceptor;

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

public class PermissionInterceptor implements Interceptor {

    @Override
    public void destroy() {
        

    }

    @Override
    public void init() {
        

    }

    @Override
    public String intercept(ActionInvocation invocation) throws Exception {
        Object user=ActionContext.getContext().getSession().get("user");
        if(user!=null){
            return invocation.invoke();//如果user不为空，代表用户已经登录，允许执行action中的方法
        }
        ActionContext.getContext().put("message", "对不起，请先登录");
        return "success";
    }

}

<?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>
  
    <!-- 指定访问后缀 -->
    <constant name="struts.action.extension" value="do,action"/>
    
    <package name="department" namespace="/test/department" extends="struts-default">
        
        <interceptors>
            <interceptor name="permission" class="com.dzq.interceptor.PermissionInterceptor"/>
            <!--拦截器栈  -->
            <interceptor-stack name="permissionStack">
                <interceptor-ref name="defaultStack"/>
                 <interceptor-ref name="permission"/>
            </interceptor-stack>
        </interceptors>
        <!-- 包内所有action都使用默认拦截器 -->
      <!--   <default-interceptor-ref name="permissionStack"/> -->
        <global-results>
            <result name="success">/WEB-INF/page/message.jsp</result>
        </global-results>
      
        <!--使用通配符访问  -->
        <action name="list_*" class="com.dzq.action.HelloWorldAction" method="{1}">
            <interceptor-ref name="permissionStack"/> 
           <!-- <interceptor-ref name=""></interceptor-ref> -->
        </action>
    </package>
</struts>