浅谈springMVC拦截器和过滤器总结
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：
<beansxmlns="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 ">
<!--编写拦截器--> <mvc:interceptors> <!--对特定的url拦截--> <mvc:interceptor> <mvc:mappingpath="/test.do"/> <beanclass="com.hbut.interceptor.TestInterceptor"/> </mvc:interceptor> <mvc:interceptor> <!--对特定的模块拦截第一级别拦截--> <mvc:mappingpath="/test/×/"/> <beanclass="com.hbut.interceptor.TestInterceptor1"/> </mvc:interceptor> <mvc:interceptor> <!--对特定的模块拦截--> <mvc:mappingpath="/test/×"/> <beanclass="com.hbut.interceptor.TestInterceptor2"/> </mvc:interceptor> </mvc:interceptors>
对所有的url进行拦截
<mvc:interceptors> <beanclass="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"/> </mvc:interceptors>
java代码
packagecom.hbut.interceptor;
importorg.springframework.web.servlet.HandlerInterceptor;
importorg.springframework.web.servlet.ModelAndView;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
/**
*@AuthorXiJun.Gong
*@DATE2016/6/1.
*aim:com.hbut.interceptor
*/
publicclassTestInterceptorimplementsHandlerInterceptor{
@Override
publicbooleanpreHandle(HttpServletRequesthttpServletRequest,HttpServletResponsehttpServletResponse,Objecto)throwsException{
//todo在此处添加要操作code
System.out.println("preHandle");
returntrue;//todo此处为false时，请求不会到达control层
}
@Override
publicvoidpostHandle(HttpServletRequesthttpServletRequest,HttpServletResponsehttpServletResponse,Objecto,ModelAndViewmodelAndView)throwsException{
System.out.println("postHandle");//todo可以用来修改信息，跳转等
}
@Override
publicvoidafterCompletion(HttpServletRequesthttpServletRequest,HttpServletResponsehttpServletResponse,Objecto,Exceptione)throwsException{
System.out.println("afterCompletion");//todo最后执行
}
}
另一种拦截器：大同小异
packagecom.hbut.interceptor;
importorg.springframework.ui.ModelMap;
importorg.springframework.web.context.request.WebRequest;
importorg.springframework.web.context.request.WebRequestInterceptor;
/**
*@AuthorXiJun.Gong
*@DATE2016/6/1.
*aim:com.hbut.interceptor
*/
publicclassTest2InterceptorimplementsWebRequestInterceptor{
@Override
publicvoidpreHandle(WebRequestwebRequest)throwsException{
}
@Override
publicvoidpostHandle(WebRequestwebRequest,ModelMapmodelMap)throwsException{
}
@Override
publicvoidafterCompletion(WebRequestwebRequest,Exceptione)throwsException{
}
}
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毛票票。