SpringBoot（五）-- 整合Spring的拦截器

一、步骤

1.创建我们自己的拦截器类并实现 HandlerInterceptor 接口。

2.创建一个Java类继承WebMvcConfigurerAdapter，并重写 addInterceptors 方法。

3.实例化我们自定义的拦截器，然后将对像手动添加到拦截器链中（在addInterceptors方法中添加）。

二、实例

1.创建自定义拦截器并实现HandlerInterceptor 接口

 package com.xsjt.interceptor;

 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.web.servlet.HandlerInterceptor;
 import org.springframework.web.servlet.ModelAndView;

 /**
  * ClassName:XbqInterceptor
  * 自定义拦截器
  * Date:     2017年11月6日 下午4:56:27
  * @author   Joe
  * @version
  * @since    JDK 1.8
  */
 public class XbqInterceptor implements HandlerInterceptor{

     private static final Logger logger = LoggerFactory.getLogger(XbqInterceptor.class);

     @Override
     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
         logger.info(this.getClass().getName() + "<---xbq--->preHandle");
         return true;
     }

     @Override
     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
         logger.info(this.getClass().getName() + "<---xbq--->postHandle");
     }

     @Override
     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
         logger.info(this.getClass().getName() + "<---xbq--->afterCompletion");
     }
 }

 package com.xsjt.interceptor;

 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.web.servlet.HandlerInterceptor;
 import org.springframework.web.servlet.ModelAndView;

 /**
  * ClassName:XbqInterceptor
  * 自定义拦截器
  * Date:     2017年11月6日 下午4:56:27
  * @author   Joe
  * @version
  * @since    JDK 1.8
  */
 public class JoeInterceptor implements HandlerInterceptor{

     private static final Logger logger = LoggerFactory.getLogger(JoeInterceptor.class);

     @Override
     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
         logger.info(this.getClass().getName() + "<---joe--->preHandle");
         return true;
     }

     @Override
     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
         logger.info(this.getClass().getName() + "<---joe--->postHandle");
     }

     @Override
     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
         logger.info(this.getClass().getName() + "<---joe--->afterCompletion");
     }
 }

2.创建一个Java类继承WebMvcConfigurerAdapter，并重写 addInterceptors 方法

3.实例化我们自定义的拦截器，然后将对像手动添加到拦截器链中（在addInterceptors方法中添加）

 package com.xsjt.config;

 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
 import com.xsjt.interceptor.JoeInterceptor;
 import com.xsjt.interceptor.XbqInterceptor;

 /**
  * ClassName:SpringInterceptorRegister
  * Spring 拦截器 注册器
  * Date:     2017年11月6日 下午4:58:32
  * @author   Joe
  * @version
  * @since    JDK 1.8
  */
 @Configuration
 public class SpringInterceptorRegister extends WebMvcConfigurerAdapter{

     /**
      * TODO 添加spring中的拦截器.
      * @see org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter#addInterceptors(org.springframework.web.servlet.config.annotation.InterceptorRegistry)
      */
     @Override
     public void addInterceptors(InterceptorRegistry registry) {
         // 拦截所有路径
         registry.addInterceptor(new XbqInterceptor()).addPathPatterns("/**");
         // 拦截/freemarker后路径
         registry.addInterceptor(new JoeInterceptor()).addPathPatterns("/freemarker/**");
         super.addInterceptors(registry);
     }

     /**
      * TODO  注册静态文件的自定义映射路径
      * @see org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter#addResourceHandlers(org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry)
      */
     @Override
     public void addResourceHandlers(ResourceHandlerRegistry registry) {
         registry.addResourceHandler("/image/**").addResourceLocations("classpath:/image/");
         registry.addResourceHandler("/picture/**").addResourceLocations("file:D:/picture/");
         super.addResourceHandlers(registry);
     }
 }

4.源码下载

　　https://gitee.com/xbq168/spring-boot-learn