1.自定义注解类

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Trace {String businessName() default "";}

2.在需要拦截的方法上加自定义注解@Trace

@Trace(businessName = "线上复核扫描出库单号")
@Token
@RequestMapping(value = "/mst-obd-review/checkorderno", method = {RequestMethod.POST, RequestMethod.GET})
public RespJson checkorderno(@RequestParam("orderNo") String orderNo,HttpServletRequest request) {
...

3.自定义拦截器

public class RpcTraceInterceptor extends HandlerInterceptorAdapter {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {TraceContext traceContext = (TraceContext) TraceContext.ctx.get();//清除traceidtraceContext.clear();//重新生成traceidMDC.put("traceId", traceContext.getTraceId());return super.preHandle(request, response, handler);}@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {//请求结束情况traceidMDC.remove("traceId");super.afterCompletion(request, response, handler, ex);}
}

public class TraceContext {public static ThreadLocal ctx = new InheritableThreadLocal() { //此处用InheritableThreadLocal保证可以在子线程得到相同的traceId@Overrideprotected TraceContext initialValue() {return new TraceContext();}};private String traceId;public String getTraceId() {if (traceId == null || "".equals(traceId)) {int hashCodeV = UUID.randomUUID().toString().hashCode();if (hashCodeV < 0) {//有可能是负数hashCodeV = -hashCodeV;}// 0 代表前面补充0// 4 代表长度为4// d 代表参数为正数型traceId = String.format("%012d", hashCodeV);}return traceId;}public void clear() {traceId = null;}
}