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淺談springMVC攔截器和過濾器總結(jié)

更新時(shí)間：2017年01月19日 11:30:23 作者：龔細(xì)軍

本篇文章主要介紹了springMVC攔截器和過濾器總結(jié)，可以用來對(duì)訪問的url進(jìn)行攔截處理，有興趣的可以了解一下。

攔截器：用來對(duì)訪問的url進(jìn)行攔截處理

用處：權(quán)限驗(yàn)證，亂碼設(shè)置等

spring-mvc.xml文件中的配置：

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    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-3.1.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-3.1.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
            http://www.springframework.org/schema/tx
            ">

  <!--編寫攔截器-->
  <mvc:interceptors>
    <!--對(duì)特定的url攔截-->
    <mvc:interceptor>
      <mvc:mapping path="/test.do"/>
      <bean class="com.hbut.interceptor.TestInterceptor"/>
    </mvc:interceptor>
    <mvc:interceptor>
      <!--對(duì)特定的模塊攔截第一級(jí)別攔截-->
      <mvc:mapping path="/test/×/"/>
      <bean class="com.hbut.interceptor.TestInterceptor1"/>
    </mvc:interceptor>

    <mvc:interceptor>
      <!--對(duì)特定的模塊攔截-->
      <mvc:mapping path="/test/×"/>
      <bean class="com.hbut.interceptor.TestInterceptor2"/>
    </mvc:interceptor>

  </mvc:interceptors>

對(duì)所有的url進(jìn)行攔截

 <mvc:interceptors>
   <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"/>
 </mvc:interceptors>

java代碼

package com.hbut.interceptor;

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

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

/**
 * @Author XiJun.Gong
 * @DATE 2016/6/1.
 * aim:  com.hbut.interceptor
 */
public class TestInterceptor implements HandlerInterceptor {

  @Override
  public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
    
   //todo 在此處添加要操作code 
   System.out.println("preHandle"); 
    return true; //todo 此處為false時(shí)，請(qǐng)求不會(huì)到達(dá)control層
  }

  @Override
  public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
    System.out.println("postHandle"); //todo 可以用來修改信息，跳轉(zhuǎn)等
  }

  @Override
  public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
    System.out.println("afterCompletion"); //todo 最后執(zhí)行
  }
}

另一種攔截器：大同小異

package com.hbut.interceptor;

import org.springframework.ui.ModelMap;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.context.request.WebRequestInterceptor;

/**
 * @Author XiJun.Gong
 * @DATE 2016/6/1.
 * aim:  com.hbut.interceptor
 */
public class Test2Interceptor implements WebRequestInterceptor {
  @Override
  public void preHandle(WebRequest webRequest) throws Exception {
  }

  @Override
  public void postHandle(WebRequest webRequest, ModelMap modelMap) throws Exception {

  }

  @Override
  public void afterCompletion(WebRequest webRequest, Exception e) throws Exception {

  }
}

過濾器：依賴于servlet容器，使用回調(diào)函數(shù)，過濾范圍大

攔截器：依賴于框架容器比如spring、mybatis ，靈活

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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