springmvc拦截器

package com.yxjn.myapp;

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

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

/**
 *
 * 拦截器
 *
 */
public class TestInterceptor1 implements HandlerInterceptor {

 //在DispatcherServlet 渲染了对应的视图之后执行。这个方法的主要作用是用于进行资源清理工作的。
 public void afterCompletion(final HttpServletRequest arg0,
           final HttpServletResponse arg1, final Object arg2, final Exception arg3)
         throws Exception {
       System.out.println("拦截器1[TestInterceptor]afterCompletion------------4");
 }

   //它会在DispatcherServlet 进行视图返回渲染之前被调用，所以我们可以在这个方法中对Controller 处理之后的ModelAndView 对象进行操作。
   public void postHandle(final HttpServletRequest arg0, final HttpServletResponse arg1,
            final Object arg2, final ModelAndView arg3) throws Exception {
       System.out.println("拦截器1[TestInterceptor]postHandle----------3");
    }

   public boolean preHandle(final HttpServletRequest arg0, final HttpServletResponse arg1,
          final Object arg2) throws Exception {
        System.out.println("拦截器1[TestInterceptor]preHandle---------1,进入程序-----2");
       //false 就到此止步，true 进行下一步2
        return true;
 }

}

package com.yxjn.myapp;

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

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

/**
 *
 * 拦截器
 *
 */
public class TestInterceptor2 implements HandlerInterceptor {

 //在DispatcherServlet 渲染了对应的视图之后执行。这个方法的主要作用是用于进行资源清理工作的。
 public void afterCompletion(final HttpServletRequest arg0,
           final HttpServletResponse arg1, final Object arg2, final Exception arg3)
         throws Exception {
       System.out.println("拦截器2[TestInterceptor]afterCompletion------------4");
 }

   //它会在DispatcherServlet 进行视图返回渲染之前被调用，所以我们可以在这个方法中对Controller 处理之后的ModelAndView 对象进行操作。
   public void postHandle(final HttpServletRequest arg0, final HttpServletResponse arg1,
            final Object arg2, final ModelAndView arg3) throws Exception {
       System.out.println("拦截器2[TestInterceptor]postHandle----------3");
    }

   public boolean preHandle(final HttpServletRequest arg0, final HttpServletResponse arg1,
          final Object arg2) throws Exception {
        System.out.println("拦截器2[TestInterceptor]preHandle---------1,进入程序-----2");
       //false 就到此止步，true 进行下一步2
        return true;
 }

}

<mvc:interceptors>
 <mvc:interceptor>
      <mvc:mapping path="/**" />
     <bean class="com.yxjn.myapp.TestInterceptor1" />
   </mvc:interceptor>
 
 <mvc:interceptor>
      <mvc:mapping path="/**" />
     <bean class="com.yxjn.myapp.TestInterceptor2" />
   </mvc:interceptor>
</mvc:interceptors>

拦截器1[TestInterceptor]preHandle---------1,进入程序-----2
拦截器2[TestInterceptor]preHandle---------1,进入程序-----2
xxx方法
拦截器2[TestInterceptor]postHandle----------3
拦截器1[TestInterceptor]postHandle----------3
拦截器2[TestInterceptor]afterCompletion------------4
拦截器1[TestInterceptor]afterCompletion------------4