求求你不要写满屏的 try...catch 了，这才是优雅的处理方式，真香...

public class AjaxResult {
 //是否成功
    private Boolean success;
    //状态码
    private Integer code;
    //提示信息
    private String msg;
    //数据
    private Object data;
    public AjaxResult() {
    }
    //自定义返回结果的构造方法
    public AjaxResult(Boolean success,Integer code, String msg,Object data) {
        this.success = success;
        this.code = code;
        this.msg = msg;
        this.data = data;
    }
    //自定义异常返回的结果
    public static AjaxResult defineError(BusinessException de){
     AjaxResult result = new AjaxResult();
        result.setSuccess(false);
        result.setCode(de.getErrorCode());
        result.setMsg(de.getErrorMsg());
        result.setData(null);
        return result;
    }
    //其他异常处理方法返回的结果
    public static AjaxResult otherError(ErrorEnum errorEnum){
     AjaxResult result = new AjaxResult();
        result.setMsg(errorEnum.getErrorMsg());
        result.setCode(errorEnum.getErrorCode());
        result.setSuccess(false);
        result.setData(null);
        return result;
    }
 public Boolean getSuccess() {
  return success;
 }
 public void setSuccess(Boolean success) {
  this.success = success;
 }
 public Integer getCode() {
  return code;
 }
 public void setCode(Integer code) {
  this.code = code;
 }
 public String getMsg() {
  return msg;
 }
 public void setMsg(String msg) {
  this.msg = msg;
 }
 public Object getData() {
  return data;
 }
 public void setData(Object data) {
  this.data = data;
 }
}

public class BusinessException extends RuntimeException {
 private static final long serialVersionUID = 1L;
 /**
  * 错误状态码
  */
 protected Integer errorCode;
 /**
  * 错误提示
  */
 protected String errorMsg;
 public BusinessException(){
     }
 public BusinessException(Integer errorCode, String errorMsg) {
         this.errorCode = errorCode;
         this.errorMsg = errorMsg;
     }
 public Integer getErrorCode() {
  return errorCode;
 }
 public void setErrorCode(Integer errorCode) {
  this.errorCode = errorCode;
 }
 public String getErrorMsg() {
  return errorMsg;
 }
 public void setErrorMsg(String errorMsg) {
  this.errorMsg = errorMsg;
 }
}

public enum ErrorEnum {
 // 数据操作错误定义
 SUCCESS(200, "成功"),
 NO_PERMISSION(403,"你没得权限"),
 NO_AUTH(401,"未登录"),
 NOT_FOUND(404, "未找到该资源!"),
 INTERNAL_SERVER_ERROR(500, "服务器异常请联系管理员"),
 ;
 /** 错误码 */
 private Integer errorCode;
 /** 错误信息 */
 private String errorMsg;
 ErrorEnum(Integer errorCode, String errorMsg) {
  this.errorCode = errorCode;
  this.errorMsg = errorMsg;
 }
    public Integer getErrorCode() {
        return errorCode;
    }
    public String getErrorMsg() {
        return errorMsg;
    }
}

/**
 * 全局异常处理器
 *
 */
@RestControllerAdvice
public class GlobalExceptionHandler
{
    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
    /**
     * 处理自定义异常
     *
     */
    @ExceptionHandler(value = BusinessException.class)
    public AjaxResult bizExceptionHandler(BusinessException e) {
     log.error(e.getMessage(), e);
        return AjaxResult.defineError(e);
    }
    /**
     *处理其他异常
     *
     */
    @ExceptionHandler(value = Exception.class)
    public AjaxResult exceptionHandler( Exception e) {
      log.error(e.getMessage(), e);
        return AjaxResult.otherError(ErrorEnum.INTERNAL_SERVER_ERROR);
    }
}