我正在使用一个默认的AnnotationMethodHandlerAdapter，我相信它应该启用对@ExceptionHandler的支持。不幸的是，如果对下面这样的处理程序方法的调用传入，则抛出ServletRequestBindingException，并且没有调用Exception处理程序。

@RequestMapping(value = "/v1/products/{code}", method = RequestMethod.GET, headers = "Accept=application/xml,application/json")
@ResponseBody
public ProductDemoDTO getProductByCode(@PathVariable final String code,
        @RequestParam(required = false, defaultValue = "BASIC") final String options)
{
    //omitted
}

这里是ExceptionHandler，从未调用过：

@ExceptionHandler(Throwable.class)
@ResponseBody
@ResponseStatus(value = HttpStatus.BAD_REQUEST)
//TODO not being called?
public void handleException(final Exception e, final HttpServletRequest request, final Writer writer) throws IOException
{
    writer.write(String.format("{\"error\":{\"java.class\":\"%s\", \"message\":\"%s\"}}", e.getClass(), e.getMessage()));
}

有谁知道为什么不调用ExceptionHandler？