拦截器： 用来对访问的url进行拦截处理
用处： 权限验证，乱码设置等
spring-mvc.xml文件中的配置：
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<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 "> |
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<!--编写拦截器--><mvc:interceptors> <!--对特定的url拦截--> <mvc:interceptor> <mvc:mapping path="/test.do"/> <bean class="com.hbut.interceptor.TestInterceptor"/> </mvc:interceptor> <mvc:interceptor> <!--对特定的模块拦截第一级别拦截--> <mvc:mapping path="/test/×/"/> <bean class="com.hbut.interceptor.TestInterceptor1"/> </mvc:interceptor> <mvc:interceptor> <!--对特定的模块拦截--> <mvc:mapping path="/test/×"/> <bean class="com.hbut.interceptor.TestInterceptor2"/> </mvc:interceptor></mvc:interceptors> |
对所有的url进行拦截
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<mvc:interceptors> <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"/></mvc:interceptors> |
java代码
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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 在此处添加要操作code System.out.println("preHandle"); return true; //todo 此处为false时，请求不会到达control层 } @Override public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception { System.out.println("postHandle"); //todo 可以用来修改信息，跳转等 } @Override public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception { System.out.println("afterCompletion"); //todo 最后执行 }} |
另一种拦截器：大同小异
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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 { }} |
过滤器： 依赖于servlet容器，使用回调函数，过滤范围大
拦截器： 依赖于框架容器 比如spring、mybatis ，灵活
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.cnblogs.com/gongxijun/p/5551542.html
