1. 引入httpclient依賴 ``` <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.5</version> </dependency> ``` 2. 工具類 ``` package net.aexit.galaxy.octopus.zongjian.util; import com.alibaba.fastjson.JSONObject; import net.aexit.galaxy.octopus.zongjian.ministry.model.A14PrintImage; import org.apache.http.*; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import org.apache.log4j.Logger; import java.io.IOException; /** * Created by dailin on 2018/9/18. */ public class HttpUtil { private static Logger logger = Logger.getLogger(HttpUtil.class); /** * 發送post請求 * * @param url 請求地址 * @param object 請求參數對象 * @throws IOException */ public static String doPost(String url, Object object) throws IOException { CloseableHttpClient httpclient = HttpClients.createDefault(); HttpPost httpPost = new HttpPost(url);// 創建httpPost httpPost.setHeader("Accept", "application/json"); httpPost.setHeader("Content-Type", "application/json"); StringEntity entity = new StringEntity(JSONObject.toJSONString(object), "utf-8"); System.out.println(JSONObject.toJSONString(object)); httpPost.setEntity(entity); CloseableHttpResponse response = null; try { response = httpclient.execute(httpPost); StatusLine status = response.getStatusLine(); int state = status.getStatusCode(); if (state == HttpStatus.SC_OK) { HttpEntity responseEntity = response.getEntity(); return EntityUtils.toString(responseEntity); } else { logger.error("請求返回:" + state + "(" + url + ")"); } } finally { if (response != null) { try { response.close(); } catch (IOException e) { e.printStackTrace(); } } try { httpclient.close(); } catch (IOException e) { e.printStackTrace(); } } return null; } public static void main(String[] args) throws Exception { A14PrintImage a14PrintImage = new A14PrintImage(); a14PrintImage.setDsId("111"); a14PrintImage.setVehicleNo("北京潭門"); HttpUtil.doPost("http://localhost:8888/test", a14PrintImage); } } ``` 3. conroller ``` @PostMapping(value = "/test") @ResponseBody public String test3(@RequestBody A14PrintImage img){ return "yes"; } ```