HttpClient基本功能的使用Get方式

HttpClient是一个开源的Java HTTP客户端库，可以发送HTTP请求，并接收HTTP响应。

使用HttpClient发送GET请求的基本步骤如下：

创建HttpClient对象：

CloseableHttpClient httpClient = HttpClients.createDefault();

创建HttpGet对象，并设置请求的URL：

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

执行GET请求并获取响应：

CloseableHttpResponse response = httpClient.execute(httpGet);

解析响应：获取响应状态码：

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

获取响应内容：

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

关闭HttpClient和HttpResponse：

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

完整的示例代码如下：

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 HttpClientDemo {public static void main(String[] args) throws Exception {CloseableHttpClient httpClient = HttpClients.createDefault();HttpGet httpGet = new HttpGet("http://www.example.com");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();}httpClient.close();}}

以上代码发送一个GET请求到http://www.example.com，并输出响应状态码和响应内容。