HttpClient基本功能的使用 Get方式

HttpClient是一个功能强大、开源的HTTP客户端库，可以用于发送HTTP请求和处理HTTP响应。使用HttpClient的Get方式发送请求需要以下步骤：

1. 创建HttpClient对象：

CloseableHttpClient httpClient = HttpClients.createDefault(); 

2. 创建HttpGet对象，并设置请求的URL：

HttpGet httpGet = new HttpGet("http://example.com/api/resource"); 

3. 执行请求并获取响应：

CloseableHttpResponse response = httpClient.execute(httpGet); 

4. 获取响应的状态码：

int statusCode = response.getStatusLine().getStatusCode(); 

5. 获取响应的内容：

HttpEntity entity = response.getEntity(); String responseContent = EntityUtils.toString(entity, "UTF-8"); 

6. 关闭HttpClient和响应：

response.close(); httpClient.close(); 

完整的示例代码如下：

import java.io.IOException; import org.apache.http.HttpEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; public class HttpClientExample { public static void main(String[] args) { CloseableHttpClient httpClient = HttpClients.createDefault(); HttpGet httpGet = new HttpGet("http://example.com/api/resource"); try { CloseableHttpResponse response = httpClient.execute(httpGet); try { int statusCode = response.getStatusLine().getStatusCode(); HttpEntity entity = response.getEntity(); String responseContent = EntityUtils.toString(entity, "UTF-8"); System.out.println("Status Code: " + statusCode); System.out.println("Response Content: " + responseContent); } finally { response.close(); } } catch (IOException e) { e.printStackTrace(); } finally { try { httpClient.close(); } catch (IOException e) { e.printStackTrace(); } } } } 

以上代码会发送一个GET请求到"http://example.com/api/resource"，并输出响应的状态码和内容。请注意，这里的示例代码没有处理异常情况，实际使用中需要进行异常处理。