如何使用 Spring Boot REST 生成自定义 JSON 响应?

Sam*_*ade 3 java rest json spring-boot

我正在使用 Spring boot 开发 Restful Web 服务。CRUD 操作运行良好。但突然出现了新的要求,响应需要采用特定的 JSON 格式。

我收到这样的回复 -

    "user": {
              "id": 123,
              "name": "shazow"
          }
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但是,要求是这样的——

    {
       "Timestamp": "2007-10-27T00:51:57Z"
       "status": "ok",
       "code": 200,
       "messages": [],
       "result": {
           "user": {
              "id": 123,
              "name": "shazow"
            }
        }
    }
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另外,如果我们检索所有用户,那么它应该是 -

    {
       "Timestamp": "2007-10-27T00:51:57Z",
       "status": "ok",
       "code": 200,
       "messages": [],
       "users"[
           "user": {
                 "id": 123,
                 "name": "Shazow"
               },

           "user": {
                 "id": 101,
                 "name": "James"
               },

           "user": {
                "id": 152,
                "name": "Mathew"
               }
          ]     
     }
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请帮忙,提前致谢。

Paw*_*ari 6

您可以在任何类中编写一个方法,就像我将其命名为响应处理程序,然后根据需要在其中设置响应。请看下面的代码:

   public class ResponseHandler {

    public static ResponseEntity<Object> generateResponse(HttpStatus status, boolean error,String message, Object responseObj) {
        Map<String, Object> map = new HashMap<String, Object>();
        try {
            map.put("timestamp", new Date());
            map.put("status", status.value());
            map.put("isSuccess", error);
            map.put("message", message);
            map.put("data", responseObj);

            return new ResponseEntity<Object>(map,status);
        } catch (Exception e) {
            map.clear();
            map.put("timestamp", new Date());
            map.put("status", HttpStatus.INTERNAL_SERVER_ERROR.value());
            map.put("isSuccess",false);
            map.put("message", e.getMessage());
            map.put("data", null);
            return new ResponseEntity<Object>(map,status);
        }
    }
}
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使用示例:

 @RestController
public class UtilityController {

    private static Logger LOGGER = LoggerFactory.getLogger(UtilityController.class);

    @RequestMapping("/test")
    ResponseEntity<Object> getAllCountry() {
        LOGGER.info("Country list fetched");
        return ResponseHandler.generateResponse(HttpStatus.OK, false, "Success", null);
    }

}
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如果您有任何其他疑问,请告诉我。