@GetMapping("/hello")
public String getStr(){
  return "hello,javadaily";
}

@GetMapping("/aniaml")
public Aniaml getAniaml(){
  Aniaml aniaml = new Aniaml(1,"pig");
  return aniaml;
}

{
  "id": 1,
  "name": "pig"
}

@GetMapping("/error")
public int error(){
    int i = 9/0;
    return i;
}

{
  "timestamp": "2021-07-08T08:05:15.423+00:00",
  "status": 500,
  "error": "Internal Server Error",
  "path": "/wrong"
}

{
  "status":"100",
  "message":"操作成功",
  "data":"hello,javadaily"
}

@Data
public class ResultData<T> {
  /** 結(jié)果狀態(tài) ,具體狀態(tài)碼參見ResultData.java*/
  private int status;
  private String message;
  private T data;
  private long timestamp ;
  public ResultData (){
    this.timestamp = System.currentTimeMillis();
  }
  public static <T> ResultData<T> success(T data) {
    ResultData<T> resultData = new ResultData<>();
    resultData.setStatus(ReturnCode.RC100.getCode());
    resultData.setMessage(ReturnCode.RC100.getMessage());
    resultData.setData(data);
    return resultData;
  }
  public static <T> ResultData<T> fail(int code, String message) {
    ResultData<T> resultData = new ResultData<>();
    resultData.setStatus(code);
    resultData.setMessage(message);
    return resultData;
  }
}

public enum ReturnCode {
    /**操作成功**/
    RC100(100,"操作成功"),
    /**操作失敗**/
    RC999(999,"操作失敗"),
    /**服務(wù)限流**/
    RC200(200,"服務(wù)開啟限流保護(hù),請(qǐng)稍后再試!"),
    /**服務(wù)降級(jí)**/
    RC201(201,"服務(wù)開啟降級(jí)保護(hù),請(qǐng)稍后再試!"),
    /**熱點(diǎn)參數(shù)限流**/
    RC202(202,"熱點(diǎn)參數(shù)限流,請(qǐng)稍后再試!"),
    /**系統(tǒng)規(guī)則不滿足**/
    RC203(203,"系統(tǒng)規(guī)則不滿足要求,請(qǐng)稍后再試!"),
    /**授權(quán)規(guī)則不通過**/
    RC204(204,"授權(quán)規(guī)則不通過,請(qǐng)稍后再試!"),
    /**access_denied**/
    RC403(403,"無訪問權(quán)限,請(qǐng)聯(lián)系管理員授予權(quán)限"),
    /**access_denied**/
    RC401(401,"匿名用戶訪問無權(quán)限資源時(shí)的異常"),
    /**服務(wù)異常**/
    RC500(500,"系統(tǒng)異常，請(qǐng)稍后重試"),
    INVALID_TOKEN(2001,"訪問令牌不合法"),
    ACCESS_DENIED(2003,"沒有權(quán)限訪問該資源"),
    CLIENT_AUTHENTICATION_FAILED(1001,"客戶端認(rèn)證失敗"),
    USERNAME_OR_PASSWORD_ERROR(1002,"用戶名或密碼錯(cuò)誤"),
    UNSUPPORTED_GRANT_TYPE(1003, "不支持的認(rèn)證模式");
    /**自定義狀態(tài)碼**/
    private final int code;
    /**自定義描述**/
    private final String message;
    ReturnCode(int code, String message){
        this.code = code;
        this.message = message;
    }
    public int getCode() {
        return code;
    }
    public String getMessage() {
        return message;
    }
}

@GetMapping("/hello")
public ResultData<String> getStr(){
 return ResultData.success("hello,javadaily");
}

{
  "status": 100,
  "message": "hello,javadaily",
  "data": null,
  "timestamp": 1625736481648,
  "httpStatus": 0
}

public interface ResponseBodyAdvice<T> {
  /**
  * 是否支持advice功能
  * true 支持，false 不支持
  */
    boolean supports(MethodParameter var1, Class<? extends HttpMessageConverter<?>> var2);

   /**
  * 對(duì)返回的數(shù)據(jù)進(jìn)行處理
  */
    @Nullable
    T beforeBodyWrite(@Nullable T var1, MethodParameter var2, MediaType var3, Class<? extends HttpMessageConverter<?>> var4, ServerHttpRequest var5, ServerHttpResponse var6);
}

/**
 * @author jam
 * @date 2021/7/8 10:10 上午
 */
@RestControllerAdvice
public class ResponseAdvice implements ResponseBodyAdvice<Object> {
    @Autowired
    private ObjectMapper objectMapper;
 
    @Override
    public boolean supports(MethodParameter methodParameter, Class<? extends HttpMessageConverter<?>> aClass) {
        return true;
    }
    @SneakyThrows
    @Override
    public Object beforeBodyWrite(Object o, MethodParameter methodParameter, MediaType mediaType, Class<? extends HttpMessageConverter<?>> aClass, ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse) {
        if(o instanceof String){
            return objectMapper.writeValueAsString(ResultData.success(o));
        }        
        return ResultData.success(o);
    }
}

if(o instanceof String){
  return objectMapper.writeValueAsString(ResultData.success(o));
} 

@GetMapping("/hello")
public String getStr(){
    return "hello,javadaily";
}

@GetMapping("/hello")
public String getStr(){
  return "hello,javadaily";
}

@GetMapping("/wrong")
public int error(){
    int i = 9/0;
    return i;
}

{
  "timestamp": "2021-07-08T08:05:15.423+00:00",
  "status": 500,
  "error": "Internal Server Error",
  "path": "/wrong"
}

@GetMapping("/wrong")
public int error(){
    int i;
    try{
        i = 9/0;
    }catch (Exception e){
        log.error("error:{}",e);
        i = 0;
    }
    return i;
}

@GetMapping("error1")
public void empty(){
 throw  new RuntimeException("自定義異常");
}

@Slf4j
@RestControllerAdvice
public class RestExceptionHandler {
    /**
     * 默認(rèn)全局異常處理。
     * @param e the e
     * @return ResultData
     */
    @ExceptionHandler(Exception.class)
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public ResultData<String> exception(Exception e) {
        log.error("全局異常信息 ex={}", e.getMessage(), e);
        return ResultData.fail(ReturnCode.RC500.getCode(),e.getMessage());
    }
 
}

@GetMapping("error1")
public void empty(){
    throw  new RuntimeException("自定義異常");
}

{
  "status": 500,
  "message": "自定義異常",
  "data": null,
  "timestamp": 1625795902556
}

{
  "status": 100,
  "message": "操作成功",
  "data": {
    "status": 500,
    "message": "自定義異常",
    "data": null,
    "timestamp": 1625796167986
  },
  "timestamp": 1625796168008
}

@SneakyThrows
@Override
public Object beforeBodyWrite(Object o, MethodParameter methodParameter, MediaType mediaType, Class<? extends HttpMessageConverter<?>> aClass, ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse) {
  if(o instanceof String){
    return objectMapper.writeValueAsString(ResultData.success(o));
  }
  if(o instanceof ResultData){
    return o;
  }
  return ResultData.success(o);
}

if(o instanceof ResultData){
  return o;
}

{
  "status": 500,
  "message": "自定義異常",
  "data": null,
  "timestamp": 1625796580778
}