使用RestTemplate的POST请求http://www.ousuiot.com:9801/querypubdata,用实体类接收结果集 请求参数： { "signature":"FC73D944C6E54087ABDC3F71AD7857BF", "deviceid":"230417100002" } 请求结果： {"code":200,"deviceid":"230417100002","data":[{"channelid":1,"devname":"温度","devvalue":"35.3","devunit":"℃","devtime":"2023-06-02 16:18:54"},{"channelid":2,"devname":"湿度","devvalue":"46.6","devunit":"%RH","devtime":"2023-06-02 16:18:54"},{"channelid":3,"devname":"光照度","devvalue":"8960","devunit":"Lux","devtime":"2023-06-02 16:18:54"},{"channelid":4,"devname":"二氧化碳","devvalue":"457","devunit":"ppm","devtime":"2023-06-02 16:18:54"},{"channelid":5,"devname":"土壤温度","devvalue":"40.1","devunit":"℃","devtime":"2023-06-02 16:18:54"},{"channelid":6,"devname":"土壤湿度","devvalue":"25.1","devunit":"%","devtime":"2023-06-02 16:18:54"},{"channelid":7,"devname":"土壤电导率","devvalue":"200","devunit":"μS/cm","devtime":"2023-06-02 16:18:54"},{"channelid":8,"devname":"土壤pH值","devvalue":"6.8","devunit":"pH","devtime":"2023-06-02 16:18:54"},{"channelid":9,"devname":"土壤氮含量","devvalue":"15","devunit":"mg/Kg","devtime":"2023-06-02 16:18:54"},{"channelid":10,"devname":"土壤磷含量","devvalue":"21","devunit":"mg/Kg","devtime":"2023-06-02 16:18:54"},{"channelid":11,"devname":"土壤钾含量","devvalue":"53","devunit":"mg/Kg","devtime":"2023-06-02 16:18:54"}]}

根据上面的请求参数和请求结果，你可以定义一个实体类`ResultEntity`来接收返回结果：

public class ResultEntity {
    private Integer code;
    private String deviceid;
    private List<DataEntity> data;

    // getters and setters
}

public class DataEntity {
    private Integer channelid;
    private String devname;
    private String devvalue;
    private String devunit;
    private String devtime;

    // getters and setters
}

然后使用RestTemplate发送POST请求并接收结果：

RestTemplate restTemplate = new RestTemplate();

String url = "http://www.ousuiot.com:9801/querypubdata";

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);

Map<String, String> requestMap = new HashMap<>();
requestMap.put("signature", "FC73D944C6E54087ABDC3F71AD7857BF");
requestMap.put("deviceid", "230417100002");

HttpEntity<Map<String, String>> requestEntity = new HttpEntity<>(requestMap, headers);

ResponseEntity<ResultEntity> responseEntity = restTemplate.postForEntity(url, requestEntity, ResultEntity.class);

ResultEntity result = responseEntity.getBody();

这样，`result`对象就包含了返回结果中的所有信息。可以通过`result.getCode()`获取返回的状态码，通过`result.getData()`获取设备数据列表。需要注意的是，`ResultEntity`中的属性名要与返回结果中的字段名一致。