Springboot发送http请求

public class HttpEntity {
    public static final HttpEntity EMPTY = new HttpEntity();
    private final HttpHeaders headers;
    @Nullable
    private final T body;

    protected HttpEntity() {
        this((Object)null, (MultiValueMap)null);
    }

    public HttpEntity(T body) {
        this(body, (MultiValueMap)null);
    }

    public HttpEntity(MultiValueMap headers) {
        this((Object)null, headers);
    }

    public HttpEntity(@Nullable T body, @Nullable MultiValueMap headers) {
        this.body = body;
        HttpHeaders tempHeaders = new HttpHeaders();
        if (headers != null) {
            tempHeaders.putAll(headers);
        }

        this.headers = HttpHeaders.readOnlyHttpHeaders(tempHeaders);
    }
    ... ...
}

public class HttpHeaders implements MultiValueMap, Serializable {
	... ...
}

import org.springframework.http.*;
import org.springframework.util.DigestUtils;
import org.springframework.util.linkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

RestTemplate restTemplate = new RestTemplate();
String reqUrl = String.format("http://jx-bd-server04.zeus.lianjia.com:16300/scheduler/task/kill?taskId=%d&userCode=%d", taskId, userId);
String response = restTemplate.getForObject(reqUrl, String.class);

RestTemplate restTemplate = new RestTemplate();
// 设置headers
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);

// 设置body
MultiValueMap body = new linkedMultiValueMap<>();
body.add("id", "123456");

//设置请求实体
HttpEntity> requestEntity = new HttpEntity<>(body, headers);
try {
    // 发送请求
    ResponseEntity response = restTemplate.postForEntity(url, requestEntity, String.class);
    return response.getBody();
} catch (Exception e) {
    return e.getMessage();
}

RestTemplate restTemplate = new RestTemplate();
// 设置headers
HttpHeaders headers = new HttpHeaders();
// headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
headers.add("appKey", "data_quality");
headers.add("ts", "1638331856505");
headers.add("sign", "4a1e98c5faf2a867af5afc83d81ab2ce");
//设置请求实体
HttpEntity requestEntity = new HttpEntity<>(headers);
try {
    ResponseEntity responseEntity = restTemplate.exchange(url, HttpMethod.GET, requestEntity, String.class);
    System.out.println(responseEntity.getBody());
} catch (Exception e) {
    System.out.println(e.getMessage());
}