所以我有一个@RestController,我想根据前端应用程序的模式返回并验证 XML,以便在编辑器中显示它们。我希望错误是 json 格式,以便用 js 处理和显示它们。
@RestController
public class UserController {
@RequestMapping(value = "/test",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_XML_VALUE)
public ResponseEntity<String> throwException(
@RequestParam(value = "flag", defaultValue = "false") Boolean flag
) throws Exception {
if (flag) {
throw new Exception();
} else {
return ResponseEntity.ok("<xml>hello</xml>");
}
}
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler(Exception.class)
@ResponseBody
ServerError exceptionHandler(HttpServletRequest req, Exception ex) {
return new ServerError(req.getRequestURL().toString(),ex);
}
}
我想以 JSON 格式返回的 ServerError :
public class ServerError {
public final String url;
public final String error;
public ServerError(String url, Exception ex) {
this.url = url;
this.error = ex.getMessage();
}
public String getUrl() {
return url;
}
public String getError() {
return error;
}
}
所以 <xml>hello</xml>
返回就好了,但是当我将标志设置为 true
时我明白了
ERROR 2017-10-18 12:56:53,189 [http-nio-0.0.0.0-8080-exec-2] org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver - Failed to invoke @ExceptionHandler method: eu.openminted.registry.core.exception.ServerError eu.openminted.registry.service.UserController.malformedExeption(javax.servlet.http.HttpServletRequest,java.lang.Exception)
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
此外,设置 produces
对 XML 和 JSON 产生相同的结果
@RequestMapping(value = "/test",
method = RequestMethod.GET,
produces = {MediaType.APPLICATION_XML_VALUE,MediaType.APPLICATION_JSON_UTF8_VALUE})
最佳答案
我设法通过从 @RequestMapping
中删除 produces
并使用 ResponseEntity
指定我要返回的类型来解决这个问题
@RequestMapping(value = "/test", method = RequestMethod.GET)
public ResponseEntity<String> throwException(
@RequestParam(value = "flag", defaultValue = "false") Boolean flag
) throws Exception {
if (flag) {
throw new Exception();
} else {
ResponseEntity response = ResponseEntity.ok().
contentType(MediaType.APPLICATION_XML).
body("<xml>hello</xml>");
return response;
}
}
该解决方案的问题在于,所有方法都有一个 @annotation
以及它们生成的类型,而这却没有,这破坏了一致性。
关于java - Spring rest controller @ExceptionHandler 返回 xml 内容和 json 错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46808109/