@RestControllerAdvice(basePackages = "com.alan.api.controller")
public class ApiResponseBodyAdvice implements ResponseBodyAdvice {
    static org.slf4j.Logger logger = LoggerFactory.getLogger("logback_api");
    @Override
    public boolean supports(MethodParameter returnType, Class converterType) {
        return (AnnotatedElementUtils.hasAnnotation(returnType.getContainingClass(), ResponseBody.class) ||
                returnType.hasMethodAnnotation(ResponseBody.class));
    }
    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType,
                  Class selectedConverterType, ServerHttpRequest serverHttpRequest, ServerHttpResponse response) {
        HttpServletRequest request = ((ServletRequestAttributes) (RequestContextHolder.currentRequestAttributes())).getRequest();
        if(request != null){
            Object obj = request.getSession().getAttribute(BaseController.session_user);
            String path = request.getServletPath();
            if (StringUtils.isBlank(path)) {
                path = request.getPathInfo();
            }
            if (obj != null) {
                path = request.getPathInfo();
                logger.info("userId:"+ ((DataUser) obj).getUserId());
            }
            logger.info("url:"+ path);
            logger.info("request:"+ JSON.toJSONString(request.getParameterMap()));
            logger.info("response:"+body);
        }
        return body;
    }
}

public interface ResponseBodyAdvice<T> { 
    / * *
    *該組件是否支持給定的控制器方法返回類型
    *和選擇的{@code HttpMessageConverter}類型。
    返回類型
    * @param converterType選擇的轉(zhuǎn)換器類型
    * @return {@code true}如果{@link #beforeBodyWrite}應(yīng)該被調(diào)用;
    * {@code false}否則
    * /
	boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType);
    / * *
    *在{@code HttpMessageConverter}被選中之后和之前調(diào)用
    *它的write方法被調(diào)用。
    * @param body要寫入的主體
    控制器方法的返回類型：
    * @param selectedContentType通過(guò)內(nèi)容協(xié)商選擇的內(nèi)容類型
    * @param selectedConverterType選擇寫入響應(yīng)的轉(zhuǎn)換器類型
    * @param request當(dāng)前請(qǐng)求
    * @param response當(dāng)前響應(yīng)
    * @return傳入的主體或修改過(guò)的(可能是新的)實(shí)例
   * /
	@Nullable
	T beforeBodyWrite(@Nullable T body, MethodParameter returnType, MediaType selectedContentType,
			Class<? extends HttpMessageConverter<?>> selectedConverterType,
			ServerHttpRequest request, ServerHttpResponse response);
}

@RestController //此注解包含@ResponseBody注解
@RequestMapping("/nandao")
public class ResponseBodyAdviceController {
 
    @RequestMapping(value = "/hello", method = RequestMethod.GET)
    public int hello() {
         //業(yè)務(wù)代碼省略
        return 5;
    } 
}

/**
*此注解針對(duì)controller層的類做增強(qiáng)功能，即對(duì)加了@RestController注解的類進(jìn)行處理
*/
@ControllerAdvice(annotations = RestController.class)
public class RestResultWrapper implements ResponseBodyAdvice<Object> {
    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        return true;
    }
 
    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request,
                                  ServerHttpResponse response) {
 
            //定義一個(gè)統(tǒng)一的返回類
            RestResult responseResult = new RestResult( "0", body, "success");
             //如果handler處理類的返回類型是String（即控制層的返回值類型），為了保證一致性，這里需要將ResponseResult轉(zhuǎn)回去
            if(body instanceof String) {
                return JSON.toJSONString(responseResult);
            }
           //封裝后的數(shù)據(jù)返回到前端頁(yè)面
            return JSONObject.toJSON(responseResult);       
    } 
}

/**
 * @author nandao
 * Created on 2021/1/12-21:47.
 * 統(tǒng)一返回Rest風(fēng)格的數(shù)據(jù)結(jié)構(gòu)
 */
public class RestResult<T>  implements Serializable {
 
    /**
     * 成功的code碼
     */
    private String code = "2000";
    /**
     * 成功時(shí)返回的數(shù)據(jù)，失敗時(shí)返回具體的異常信息
     */
    private T data;
    /**
     * 請(qǐng)求失敗返回的提示信息，給前端進(jìn)行頁(yè)面展示的信息
     */
    private String message ; 
    public RestResult() {
    }
 
    @Override
    public String toString() {
 
        return "RestResult{" +
                "code='" + code + '\'' +
                ", data=" + data +
                ", message=" + message +
                '}';
    }
 
    public RestResult(String code, T data, String message) {
        this.code = code;
        this.data = data;
        this.message = message;
    }
 
    public String getCode() {
        return code;
    }
 
    public void setCode(String code) {
        this.code = code;
    }
 
    public T getData() {
        return data;
    }
 
    public void setData(T data) {
        this.data = data;
    }
 
    public String getMessage() {
        return message;
    }
 
    public void setMessage(String message) {
        this.message = message;
    }
}