JAVA接口調用工具類

package com.zving.util;

 
          import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate; 
         

 
          /**
 * *接口調用工具類
 * @author clove
 * @create: 2020-01-15
 */ 
         

 
          public class RestTemplateUtil {
 
    private static class SingletonRestTemplate {
        static final RestTemplate INSTANCE = new RestTemplate();
    }
 
    private RestTemplateUtil() {
     
    }
 
    public static RestTemplate getInstance() {
        return SingletonRestTemplate.INSTANCE;
    }
    
    /**
     * * GET請求
     * @param url 請求路徑
     * @param jwt所需的Token不需要可傳null
     * @return
     */
    public static String get(String url, String token) {
        HttpHeaders headers = new HttpHeaders();
        headers.add("Accept", "application/json");
        headers.add("Content-Encoding", "UTF-8");
        headers.add("Content-Type", "application/json; charset=UTF-8");
        if (token != null) {
            headers.add("token", token);
        }
        HttpEntity<String> requestEntity = new HttpEntity<>(null, headers);
        ResponseEntity<String> response = RestTemplateUtil.getInstance().exchange(url, HttpMethod.GET, requestEntity, String.class);
        String responseInfo = response.getBody();
        return responseInfo;
    }
 
    /**
     * * POST請求
     * @param url 請求路徑
     * @param data body數據
     * @param token jwt所需的Token不需要可傳null
     * @return
     */
    public static String post(String url, String data, String token) {
        HttpHeaders headers = new HttpHeaders();
        headers.add("Accept", "application/json");
        headers.add("Content-Encoding", "UTF-8");
        headers.add("Content-Type", "application/json; charset=UTF-8");
        if (token != null) {
            headers.add("Authorization", token);
        }
        HttpEntity<String> requestEntity = new HttpEntity<>(data, headers);
        return RestTemplateUtil.getInstance().postForObject(url, requestEntity, String.class);
    }
 
}
 
         

 以下為調用代碼：

  public static void main(String[] args) {
        //Get接口調用        
        String url="http://www.kuaidi100.com/query?type=yuantong&postid=11111111111";
        String responseInfo = RestTemplateUtil.get(url, null);
        System.out.println(responseInfo);
        
        //Post接口調用
        String Url="http://localhost:8080/login/doLogin";
        ObjectMapper objectMapper = new ObjectMapper();
        String data = null;
        UserLogin userLogin=new UserLogin("clover","12345","weq");
        try {
            data = objectMapper.writeValueAsString(userLogin);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        String responseInfo2 = RestTemplateUtil.post(Url, data, null);
        System.out.println(responseInfo2);
  }

 非SpringBoot應用可添加以下依賴完成