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springMVC拦截器和过滤器总结

2024-09-22 06:42:09   203人阅读

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：

<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                        ">

 

    <!--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

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

java代码

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

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

 

springMVC拦截器和过滤器总结


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