返回JSON或XML的ExceptionHandler无法在spring mvc 3中运行

Question

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;
    }

}

当我尝试卷曲-H"接受:application/json"-v"http://localhost.com:8080/testerror"我收到此错误:org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerExceptionResolver - 找不到HttpMessageConverter,支持返回类型[类com.kibboko.poprocks.appservices.dtos.ErrorTO]和[application/json]

但如果我尝试卷曲-H"接受:application/json"-v"http://localhost.com:8080/test",工作并返回json响应."application/xml"也有效.

我需要处理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!

Answer 1

它似乎AnnotationMethodHandlerExceptionResolver有自己的HttpMessageConverters 数组.您需要将其配置为使用相同的数组AnnotationMethodHandlerAdapter.

但是,AnnotationMethodHandlerAdapter隐式声明时可能会很复杂.FactoryBean在所有情况下,或许声明以下内容可能会有所帮助:

public class AnnotationMethodHandlerExceptionResolverFactoryBean
        implements FactoryBean<AnnotationMethodHandlerExceptionResolver> {
    @Autowired
    private AnnotationMethodHandlerAdapter a;

    public AnnotationMethodHandlerExceptionResolver getObject()
            throws Exception {
        AnnotationMethodHandlerExceptionResolver r = new AnnotationMethodHandlerExceptionResolver();
        r.setMessageConverters(a.getMessageConverters());
        return r;
    }

    ...
}

Answer 2

似乎是一个已知的 Spring bug（已在 3.1 M1 中修复）

https://jira.springsource.org/browse/SPR-6902