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==============================