springMVC全局异常处理

@ControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(value = Exception.class)
    public void defaultErrorHandler(HttpServletRequest req, Exception e, HttpServletResponse response) throws Exception {
        OutputStream outputStream = response.getOutputStream();
        outputStream.write("全局异常".getBytes("UTF-8"));
        outputStream.flush();
        outputStream.close();
    }
}

　　/**
     * 删除用户
     * @param id
     * @return
     */
    @RequestMapping(value = "{id}", method = RequestMethod.DELETE)
    public String deleteUser(@PathVariable Long id){
        System.out.println("删除用户");
        try {
            throw new CustomException("自定义异常");
        } catch (CustomException e) {
            return e.getMessage();
        }
    }