1.这是我们能够预判到的异常

public class GlobalException extends RuntimeException{

	private static final long serialVersionUID = 1L;
	
	private CodeMsg cm;
	
	public GlobalException(CodeMsg cm) {
		super(cm.toString());
		this.cm = cm;
	}

	public CodeMsg getCm() {
		return cm;
	}

}

2.判断具体的异常种类，然后给具体的提示信息

@ControllerAdvice
@ResponseBody
public class GlobalExceptionHandler {
	@ExceptionHandler(value=Exception.class)
	public Result<String> exceptionHandler(HttpServletRequest request, Exception e){
		e.printStackTrace();
		if(e instanceof GlobalException) {
			GlobalException ex = (GlobalException)e;
			return Result.error(ex.getCm());
		}else if(e instanceof BindException) {
			BindException ex = (BindException)e;
			List<ObjectError> errors = ex.getAllErrors();
			ObjectError error = errors.get(0);
			String msg = error.getDefaultMessage();
			return Result.error(CodeMsg.BIND_ERROR.fillArgs(msg));
		}else {
			return Result.error(CodeMsg.SERVER_ERROR);
		}
	}
}