Java 如何在休息时返回布尔值？
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How to return a boolean value with rest?
提问by membersound
I want to provide a booleanRESTservice that only provides true/false boolean response.
我想提供一个booleanREST只提供真/假布尔响应的服务。
But the following does not work. Why?
但以下不起作用。为什么？
@RestController
@RequestMapping("/")
public class RestService {
@RequestMapping(value = "/",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_XML_VALUE)
@ResponseBody
public Boolean isValid() {
return true;
}
}
Result: HTTP 406: The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers.
结果： HTTP 406: The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers.
采纳答案by ci_
You don't have to remove @ResponseBody, you could have just removed the MediaType:
您不必删除@ResponseBody，您可以删除MediaType：
@RequestMapping(value = "/", method = RequestMethod.GET)
@ResponseBody
public Boolean isValid() {
return true;
}
in which case it would have defaulted to application/json, so this would work too:
在这种情况下，它会默认为application/json，所以这也可以：
@RequestMapping(value = "/", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public Boolean isValid() {
return true;
}
if you specify MediaType.APPLICATION_XML_VALUE, your response really has to be serializable to XML, which truecannot be.
如果您指定MediaType.APPLICATION_XML_VALUE，则您的响应确实必须可序列化为 XML，而true不能。
Also, if you just want a plain truein the response it isn't really XML is it?
另外，如果您只想要一个简单true的响应，它实际上不是 XML，是吗？
If you specifically want text/plain, you could do it like this:
如果你特别想要text/plain，你可以这样做：
@RequestMapping(value = "/", method = RequestMethod.GET, produces = MediaType.TEXT_PLAIN_VALUE)
@ResponseBody
public String isValid() {
return Boolean.TRUE.toString();
}
