问题描述

对于Spring mvc的拦截器我觉的应该是请求什么就该拦截什么，没有请求的就不该被拦截，但是不知道为什么，在如下的代码中，当我请求/路径的时候，我并没有请求index.html呀，为什么执行完控制器的代码和拦截器的postHandle方法之后，又执行了一次preHandle。我实在是想不明白为什么会是这样。详细内容如下：

相关代码

项目名称：codesound

Controller代码

@RequestMapping(value="/",method=RequestMethod.GET)

public String domain() {

System.out.println("控制器被调用");

return "index";

}

拦截器LoginInterceptor代码

package com.xy.codesound.interceptor;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;

import org.springframework.web.servlet.ModelAndView;

public class LoginInterceptor implements HandlerInterceptor {

@Override

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)

throws Exception {

System.out.println("preHandle:"+request.getRequestURL());

return true;

}

@Override

public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,

ModelAndView modelAndView) throws Exception {

System.out.println("postHandle");

}

@Override

public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)

throws Exception {

System.out.println("afterCompletion");

}

}

拦截器配置信息

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:mvc="http://www.springframework.org/schema/mvc"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd

http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">

mapping="/resources/**">

class="org.springframework.web.servlet.view.InternalResourceViewResolver">

class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

10485760

UTF-8

base-package="com.xy.codesound.web">

当浏览器发起127.0.0.1:8080/codesound/请求，我期待的控制台输出结果是

preHandle:http://127.0.0.1:8080/codesound/

控制器被调用

postHandle

afterCompletion

实际看到的错误信息是

preHandle:http://127.0.0.1:8080/codesound/

控制器被调用

postHandle

preHandle:http://127.0.0.1:8080/codesound/WEB-INF/html/index.html

postHandle

afterCompletion

afterCompletion