java httpClient 发送post请求

以下是Java HttpClient发送POST请求的示例代码： ```java import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; public class HttpClientPostExample { public static void main(String[] args) { CloseableHttpClient httpClient = HttpClients.createDefault(); try { HttpPost httpPost = new HttpPost("http://example.com/api/post"); // 构造POST请求参数 List<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("username", "testuser")); params.add(new BasicNameValuePair("password", "testpass")); httpPost.setEntity(new UrlEncodedFormEntity(params)); // 发送POST请求 HttpResponse response = httpClient.execute(httpPost); // 处理响应结果 System.out.println("Response Code : " + response.getStatusLine().getStatusCode()); HttpEntity entity = response.getEntity(); if (entity != null) { BufferedReader br = new BufferedReader(new InputStreamReader(entity.getContent())); String line = ""; while ((line = br.readLine()) != null) { System.out.println(line); } } EntityUtils.consume(entity); } catch (Exception e) { e.printStackTrace(); } finally { try { httpClient.close(); } catch (Exception e) { e.printStackTrace(); } } } } ``` 该示例代码使用Apache HttpClient库发送POST请求，构造POST请求参数并设置到HttpEntity中，然后使用HttpClient.execute()方法发送请求并获取响应结果。最后使用EntityUtils.consume()方法释放资源。