Java Servlet 过滤器与 SpringMVC 拦截器的区别？(4)

<mvc:interceptor>
            <!--进行拦截的地址-->
            <mvc:mapping path="/**"/>
            <bean/>
        </mvc:interceptor>

<mvc:interceptor>
            <!--进行拦截的地址-->
            <mvc:mapping path="/**"/>
            <bean/>
        </mvc:interceptor>

</mvc:interceptors>
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java 代码：

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package com.yule.common.interceptors;

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

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

/**
 * 自定义拦截器方式一
 * Created by yule on 2018/7/2 22:37.
 */
public class DemoInterceptor implements HandlerInterceptor{
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        //return true 表示继续下一个拦截器或者 control 层
        //return false 表示被拦截下来
        System.out.println("preHandle");
        return true;
    }

@Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle");
    }

@Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
        System.out.println("afterCompletion");
    }
}
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package com.yule.common.interceptors;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

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

/**
 * 自定义拦截器方式二
 * 一般都是通过实现HandlerInterceptor接口或者继承HandlerInterceptorAdapter抽象类，复写preHandle()、postHandle()和afterCompletion()这 3 个方法来对用户的请求进行拦截处理
 * Created by yule on 2018/7/2 22:43.
 */
public class Demo2Interceptor extends HandlerInterceptorAdapter {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("preHandle 2222222...");
        return true;
    }

@Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle 22222222");
    }

@Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("afterCompletion 2222222");
    }
}

过滤器， web.xml 中：

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<!-- 定义Filter -->
  <filter>
    <!-- Filter的名字 -->
    <filter-name>demoFilter</filter-name>
    <!-- Filter的实现类 -->
    <filter-class>com.yule.common.filters.DemoFilter</filter-class>
  </filter>
  <!-- 定义Filter拦截的URL地址 -->
  <filter-mapping>
    <!-- Filter的名字 -->
    <filter-name>demoFilter</filter-name>
    <!-- Filter负责拦截的URL 全部以/的请求,如果/*,将会所有的请求-->
    <url-pattern>/*</url-pattern>
  </filter-mapping>

<filter>
    <filter-name>demo2Filter</filter-name>
    <filter-class>com.yule.common.filters.Demo2Filter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>demo2Filter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
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java 代码：

package com.yule.common.filters;

import javax.servlet.*;
import java.io.IOException;