SpringBoot拦截器

最近项目中有一个需求，对来访的请求，进行计算，记录下业务处理时间。Spring Boot项目中使用拦截器，超级简单，再次说明一下用法。相信大家一看便懂。

1.继承 HandlerInterceptor 实现具体的处理逻辑

  

   

    

     

    
    

     

      public interface HandlerInterceptor {
     
    
   

    

     

    
    

     
    boolean preHandle(HttpServletRequest var1, HttpServletResponse var2, Object var3) throws Exception; //是否放行
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    void postHandle(HttpServletRequest var1, HttpServletResponse var2, Object var3, ModelAndView var4) throws Exception; //处理结束
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    void afterCompletion(HttpServletRequest var1, HttpServletResponse var2, Object var3, Exception var4) throws Exception; //在处理结束后执行，最后执行的方法
     
    
   

    

     

    
    

     

      }
     
    
  
 

以下是我的处理逻辑

  

   

    

     

    
    

     

      /**
     
    
   

    

     

    
    

     

       * @Package: foxlife.base.interceptor
     
    
   

    

     

    
    

     

       * @Description: 处理时间拦截器，记录下，接口处理时间
     
    
   

    

     

    
    

     

       * @author: liuxin
     
    
   

    

     

    
    

     

       * @date: 17/2/22 上午10:58
     
    
   

    

     

    
    

     

       */
     
    
   

    

     

    
    

     

      @Component
     
    
   

    

     

    
    

     

      public class ChanelInterceptor implements HandlerInterceptor {
     
    
   

    

     

    
    

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

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    @Override
     
    
   

    

     

    
    

     
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
     
    
   

    

     

    
    

     

              logger.info("============================拦截器启动==============================");
     
    
   

    

     

    
    

     

              request.setAttribute("starttime",System.currentTimeMillis());
     
    
   

    

     

    
    

     
        return true;
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    @Override
     
    
   

    

     

    
    

     
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object o, ModelAndView modelAndView) throws Exception {
     
    
   

    

     

    
    

     

              logger.info("===========================执行处理完毕=============================");
     
    
   

    

     

    
    

     
        long starttime = (long) request.getAttribute("starttime");
     
    
   

    

     

    
    

     

              request.removeAttribute("starttime");
     
    
   

    

     

    
    

     
        long endtime = System.currentTimeMillis();
     
    
   

    

     

    
    

     

              logger.info("============请求地址："+request.getRequestURI()+"：处理时间：{}",(endtime-starttime)+"ms");
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    @Override
     
    
   

    

     

    
    

     
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
     
    
   

    

     

    
    

     

              logger.info("============================拦截器关闭==============================");
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
  
 

  
 
 

2.配置拦截器到应用中

  

   

    

     

    
    

     

      /**
     
    
   

    

     

    
    

     

       * @Package: foxlife.base.config
     
    
   

    

     

    
    

     

       * @Description: 配置拦截器
     
    
   

    

     

    
    

     

       * @author: liuxin
     
    
   

    

     

    
    

     

       * @date: 17/2/22 上午11:04
     
    
   

    

     

    
    

     

       */
     
    
   

    

     

    
    

     

      @Configuration
     
    
   

    

     

    
    

     

      public class MyInterceptorConfig extends WebMvcConfigurerAdapter{
     
    
   

    

     

    
    

     
    @Override
     
    
   

    

     

    
    

     
    public void addInterceptors(InterceptorRegistry registry) {
     
    
   

    

     

    
    

     

              registry.addInterceptor(new ChanelInterceptor()).addPathPatterns("/**");
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
  
 

3.演示

  

   

    

     

    
    

     

      2017-02-23 15:40:43.619  INFO 64568 --- [io-31024-exec-3] f.base.interceptor.ChanelInterceptor     : ============================拦截器启动==============================
     
    
   

    

     

    
    

     

      2017-02-23 15:40:43.621  INFO 64568 --- [io-31024-exec-3] f.base.interceptor.ChanelInterceptor     : ===========================执行处理完毕=============================
     
    
   

    

     

    
    

     

      2017-02-23 15:40:43.621  INFO 64568 --- [io-31024-exec-3] f.base.interceptor.ChanelInterceptor     : ============请求地址：/error：处理时间：2ms
     
    
   

    

     

    
    

     

      2017-02-23 15:40:43.621  INFO 64568 --- [io-31024-exec-3] f.base.interceptor.ChanelInterceptor     : ============================拦截器关闭==============================
     
    
  
 

文章来源: springlearn.blog.csdn.net，作者：西魏陶渊明，版权归原作者所有，如需转载，请联系作者。

原文链接：springlearn.blog.csdn.net/article/details/102425270