如何用rest返回一个布尔值?

时间:2015-03-03 10:02:39

标签: java spring rest spring-boot

我想提供仅提供真/假布尔响应的boolean REST服务。

但以下不起作用。为什么呢?

@RestController
@RequestMapping("/")
public class RestService {
    @RequestMapping(value = "/",
        method = RequestMethod.GET,
        produces = MediaType.APPLICATION_XML_VALUE)
    @ResponseBody
    public Boolean isValid() {
        return true;
    }
}

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.

1 个答案:

答案 0 :(得分:12)

您不必删除@ResponseBody,您可能刚刚删除了MediaType

@RequestMapping(value = "/", method = RequestMethod.GET)
@ResponseBody
public Boolean isValid() {
    return true;
}

在这种情况下它会默认为application/json,所以这也会有效:

@RequestMapping(value = "/", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public Boolean isValid() {
    return true;
}

如果您指定MediaType.APPLICATION_XML_VALUE,则您的响应必须可序列化为XML,true不能。

另外,如果您只想在回复中使用简单的true,那么它是不是真的是XML?

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();
}