ResponseBodyAdvice处理返回数据

package com.xf.config;

import org.slf4j.MDC;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

import com.xf.common.JsonRet;

@ControllerAdvice("com.xf.controller")
public class MyResponseBodyAdvice implements ResponseBodyAdvice {

    @Override
    public boolean supports(MethodParameter returnType, Class converterType) {
        return true;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType,
            Class selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (body instanceof JsonRet)
            ((JsonRet) body).setReqid(MDC.get("request-id"));
        return body;
    }

}