POST请求用于向服务器发送数据;例如，使用HTML表单的客户信息，文件
上传等.
HttpClient API提供了一个名为 HttpPost 的类，它代表POST请求.
按照以下步骤使用HttpClient库发送HTTP POST请求.
HttpClients 类的 createDefault()方法返回类 CloseableHttpClient 的对象，这是基础实现 HttpClient 接口.
使用此方法创建一个HttpClient对象.
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpPost 类代表 HTTP POST 请求.这将使用URI发送所需数据并检索给定服务器的信息.
通过实例化 HttpPost 类并传递表示URI的字符串值来创建此请求，作为其构造函数的参数.
HttpGet httpGet = new HttpGet("http://www.it1352.com/");执行()方法CloseableHttpClient对象接受HttpUriRequest(接口)对象(即HttpGet，HttpPost，HttpPut，HttpHead等)并返回响应对象.
HttpResponse httpResponse = httpclient.execute(httpget);
以下示例演示了如何使用
HttpClient库执行HTTP POST请求.
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
public class HttpPostExample {
public static void main(String args[]) throws Exception{
//Creating a HttpClient object
CloseableHttpClient httpclient = HttpClients.createDefault();
//Creating a HttpGet object
HttpPost httppost = new HttpPost("https://www.IT屋.com/");
//Printing the method used
System.out.println("Request Type: "+httppost.getMethod());
//Executing the Get request
HttpResponse httpresponse = httpclient.execute(httppost);
Scanner sc = new Scanner(httpresponse.getEntity().getContent());
//Printing the status line
System.out.println(httpresponse.getStatusLine());
while(sc.hasNext()) {
System.out.println(sc.nextLine());
}
}
}上述程序生成以下输出.
Request Type: POST <!DOCTYPE html> <!--[if IE 8]><html class = "ie ie8"> <![endif]--> <!--[if IE 9]><html class = "ie ie9"> <![endif]--> <!--[if gt IE 9]><!--> <html lang = "en-US"> <!--<![endif]--> <head> <!-- Basic --> <meta charset = "utf-8"> <title>Parallax Scrolling, Java Cryptography, YAML, Python Data Science, Java i18n, GitLab, TestRail, VersionOne, DBUtils, Common CLI, Seaborn, Ansible, LOLCODE, Current Affairs 2018, Apache Commons Collections</title> <meta name = "Description" content = "Parallax Scrolling, Java Cryptography, YAML, Python Data Science, Java i18n, GitLab, TestRail, VersionOne, DBUtils, Common CLI, Seaborn, Ansible, LOLCODE, Current Affairs 2018, Intellij Idea, Apache Commons Collections, Java 9, GSON, TestLink, Inter Process Communication (IPC), Logo, PySpark, Google Tag Manager, Free IFSC Code, SAP Workflow"/> <meta name = "Keywords" content="Python Data Science, Java i18n, GitLab, TestRail, VersionOne, DBUtils, Common CLI, Seaborn, Ansible, LOLCODE, Gson, TestLink, Inter Process Communication (IPC), Logo"/> <meta http-equiv = "X-UA-Compatible" content = "IE = edge"> <meta name = "viewport" conten t= "width = device-width,initial-scale = 1.0,userscalable = yes"> <link href = "https://img01.yuandaxia.cn/Content/img/tutorials/apache_httpclient/mui-rem.min.css" rel = "stylesheet" type = "text/css" /> <link rel = "stylesheet" href = "/questions/css/home.css?v = 3" /> <script src = "/questions/js/jquery.min.js"></script> <script src = "/questions/js/fontawesome.js"></script> <script src = "https://cdn.muicss.com/mui-0.9.39/js/mui.min.js"></script> </head> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . </script> </body> </html>
