springboot全局异常处理（1）

新建一个类 在类上加一个注解即可 @ControllerAdvice 

/**
 * 全局错误处理
 * @author sys
 *
 */
@ControllerAdvice
@ResponseBody
public class GlobalExceptionHandler {
  private final Logger log = Logger.getLogger(this.getClass());
  @ExceptionHandler(value=Exception.class)  //拦截异常的种类
  public Object MethodArgumentNotValidHandler(HttpServletRequest request,
          Exception ex) throws Exception
  {  

          StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        ex.printStackTrace(pw);
        log.error(sw.toString());
        ResData res = new ResData(,"请求错误");
      return JSON.toJSONString(res);
  }
}