spring前置AOP拦截action

<!-- 实现BEFORE通知 配置 -->

   <bean id="autoProxyCreator"
   class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"></bean>

<bean id="checkCustomerBefore" class="com.egt.struts.action.CheckCustomerAction"></bean>
<bean id="checkCustomerBeforeAdvisor"
   class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
   <property name="advice">
    <ref bean="checkCustomerBefore" />
   </property>
   <property name="patterns">
   <value>.*.execute</value>
   </property>
</bean>

CheckCustomerAction 方法

package com.egt.struts.action;

import java.lang.reflect.Method;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.apache.struts.action.ActionMapping;
import org.springframework.aop.MethodBeforeAdvice;

import com.egt.repository.Customer;

public class CheckCustomerAction implements MethodBeforeAdvice {
private Logger logger = Logger.getLogger(this.getClass().getName());

public void before(Method method, Object[] args, Object target)
    throws Throwable {
   System.out.println("test1");
   logger.log(Priority.INFO, "customer权限控制拦截...");
   System.out.println("test2");

   HttpServletRequest request = (HttpServletRequest) args[2];
   HttpServletResponse response = (HttpServletResponse) args[3];
   HttpSession session = request.getSession();
   ActionMapping mapping = (ActionMapping) args[0];
  
   if (session.getAttribute("customer") == null) {
    System.out.println("test3");
    try {
     String url = request.getContextPath() + "/index.jsp";
     response.sendRedirect(url);
    } catch (Exception e) {
     System.out.println("test4");
    }
   }

}

}

如果我们每次调用到action里面的execute方法时就会调用拦截器进行拦截判断，

public void before(Method method, Object[] args, Object target)

method指拦截的方法，Object[] args指拦截的方法对应的参数，target指拦截的对象