Struts不使用注解，配置拦截器interceptor

这种配置拦截器方式比struts使用注解配置拦截器的方式简单

配置步骤：

一、先写一个拦截器，因为我们重点在配置，这里我写了个登录拦截器(LoginInterceptor .java)，继承AbstractInterceptor

package com.kaishengit.web.interceptor;

import java.util.Map;
import java.util.Set;


import com.kaishengit.pojo.Employee;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import com.opensymphony.xwork2.util.TextParseUtil;

public class LoginInterceptor extends AbstractInterceptor{

	private static final long serialVersionUID = 1L;
	private String excludeActionName;//剔除的拦截方法
	private String sessionName;//用户名在session中存放的key值
	
	@Override
	public String intercept(ActionInvocation invocation) throws Exception {
		String actionName = invocation.getProxy().getActionName();//获取当前访问的action名字
		
		Set<String> set = TextParseUtil.commaDelimitedStringToSet(excludeActionName);
		
		if(set.contains(actionName)){
			return invocation.invoke();
		}else{
			Map<String, Object> session = invocation.getInvocationContext().getSession();
			Employee employee = (Employee) session.get(sessionName);
			if(employee == null){
				return "login";//没有登录，跳转到登录页
			}else{
				return invocation.invoke();
			}
		}
	}
	
	
	//get set
	public String getExcludeActionName() {
		return excludeActionName;
	}
	public void setExcludeActionName(String excludeActionName) {
		this.excludeActionName = excludeActionName;
	}
	public String getSessionName() {
		return sessionName;
	}
	public void setSessionName(String sessionName) {
		this.sessionName = sessionName;
	}
	
	
	
}
           

  二、在struts.xml中配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
	"http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts>

	<package name="myPackage" extends="struts-default">
		
		<interceptors>
			<!--配置自己写的登录拦截器  -->
			<interceptor name="loginInterceptor" class="com.kaishengit.web.interceptor.LoginInterceptor"></interceptor>
			<!-- 配置一个自己的拦截器栈 -->
			<interceptor-stack name="myStack">
				<interceptor-ref name="loginInterceptor">
					<param name="sessionName">currUser</param>
					<param name="excludeActionName">index,login</param>
				</interceptor-ref>
				<interceptor-ref name="defaultStack"></interceptor-ref>
			</interceptor-stack>
		</interceptors>
		
		<default-interceptor-ref name="myStack"></default-interceptor-ref>
		
		<global-results>
			<result name="login" type="redirectAction">index.php?state=10002</result>
		</global-results>
		
		<action name="index" class="com.kaishengit.web.AppAction">
			<result>/WEB-INF/views/index.jsp</result>
		</action>
		....
		
	</package>
</struts>      

 --end---