【HttpClient】一个http_post请求例子

package httpclient.httpclient;import java.io.IOException;import org.apache.http.Header;import org.apache.http.HttpEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClientBuilder;import org.apache.http.util.EntityUtils;public class HttpClientUtil {public void testPost() {//1.创建客户端访问服务器的httpclient对象CloseableHttpClient httpClient = HttpClientBuilder.create().build();//2.定义请求的urlString url = "https://XXX.XXX.com/NC1000001";//3.以请求的连接地址创建get/post请求对象HttpPost post = new HttpPost(url);//如果有header请求，添加header请求post.addHeader("x-api-key", "XXX");post.addHeader("x-lang", "en-US");try {//4.向服务器发送请求，并获取返回数据CloseableHttpResponse response = httpClient.execute(post);//获取返回的所有headersHeader[] headers = response.getAllHeaders();for (Header header : headers) {System.out.println(header);}//获取返回的状态int status = response.getStatusLine().getStatusCode();System.out.println(status);//获取HttpEntity消息载体对象HttpEntity entity = response.getEntity();// EntityUtils中的toString()方法转换服务器的响应数据String str = EntityUtils.toString(entity, "utf-8");System.out.println("服务器的响应是:" + str);//5.关闭连接httpClient.close();} catch (IOException e) {e.printStackTrace();}}public static void main(String[] args) {HttpClientUtil util = new HttpClientUtil();util.testPost();}}