代码是这样的：

   @Controller
    public class TestController {

        @RequestMapping(value = "/testerror", method = RequestMethod.GET)
        public @ResponseBody ErrorTO testerror(HttpServletRequest request,HttpServletResponse response) {
           throw new ABCException("serious error!");
        }


        @ExceptionHandler(ABCException.class)
        public  @ResponseBody ErrorTO handleException(ABCException ex,
                HttpServletRequest request, HttpServletResponse response) {
            response.setStatus(response.SC_BAD_REQUEST);
            return new ErrorTO(ex.getMessage());
        }


     @RequestMapping(value = "/test", method = RequestMethod.GET)
    public @ResponseBody ErrorTO test(HttpServletRequest request, 
                                      HttpServletResponse response) {
        ErrorTO error = new ErrorTO();
        error.setCode(-12345);
        error.setMessage("this is a test error.");
        return error;
    }

}

当我尝试curl -H“ Accept：application / json” -v“
http://localhost.com:8080/testerror”时，出现以下错误：org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerExceptionResolver-
找不到支持返回类型[class com.kibboko.poprocks.appservices.dtos.ErrorTO]和[application /
json]的HttpMessageConverter

但是，如果我尝试curl -H“ Accept：application / json” -v“
http://localhost.com:8080/test”，则可以工作并返回json响应。“ application / xml”也起作用。

我需要照顾的异常处理程序有什么特别之处，以便它可以与json或xml一起使用吗？谢谢！