java http/https post/get 请求 ，携带header参数

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import com.alibaba.fastjson.JSONObject;   import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.HttpClientBuilder; import org.apache.http.util.EntityUtils;   import java.nio.charset.Charset;   public class HttpPostJsonUtil {       public static JSONObject doPost(String url, JSONObject jsonObject) {         HttpClient client = HttpClientBuilder.create().build();         HttpPost post = new HttpPost(url);         JSONObject response = null;         post.addHeader("Content-type","application/json; charset=utf-8");         post.setHeader("Accept", "application/json");           try {             post.setEntity(new StringEntity(jsonObject.toString(), Charset.forName("UTF-8")));             HttpResponse res = client.execute(post);             if (res.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {                 HttpEntity entity = res.getEntity();                 String result = EntityUtils.toString(entity);                 response = JSONObject.parseObject(result);             }         } catch (Exception e) {             throw new RuntimeException(e);         }         return response;     }       public static JSONObject doGet(String url) {         HttpClient client = HttpClientBuilder.create().build();         HttpGet get = new HttpGet(url);         JSONObject response = null;         get.addHeader("Content-type","application/json; charset=utf-8");         get.setHeader("Accept", "application/json");           try {             HttpResponse res = client.execute(get);             if (res.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {                 HttpEntity entity = res.getEntity();                 String result = EntityUtils.toString(entity);                 response = JSONObject.parseObject(result);             }         } catch (Exception e) {             throw new RuntimeException(e);         }         return response;     }   }

　方法中，jsonObject 参数可以换成 list 或者 map ，只要将 

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1	jsonObject.toString() 换成

JSONObject.toJSONString(list) 或者

JSONObject.toJSONString(map)