springboot如何添加全局异常捕获类

@RestController
public class HelloController {

  @RequestMapping("/hello")
  public String hello(String idNum) {
     
    throw new BusinessException("抛出业务异常");
    
  }
}

//@ControllerAdvice 该注解定义全局异常处理类
@ControllerAdvice
public class GlobalExceptionHandler {

  //@ExceptionHandler 该注解声明异常处理方法
  //value=BusinessException.classb表示处理抛出的BusinessException异常
  @ExceptionHandler(value = BusinessException.class) 
  public ReturnResult defaultErrorHandler(HttpServletRequest req, Exception e) {
    ReturnResult result = new ReturnResult(); //出现异常后返回到前端的信息
    result.setCode("-1");
    result.setMsg("出现了业务异常");
    //打印异常信息
   logger.error("调用失败", e);
    
   return result;
  }
}