Java网络爬虫--HttpClient

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 SimpleHttpClient {
    public static void main(String[] args) {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        try {
            HttpGet httpGet = new HttpGet("http://www.example.com/");
            CloseableHttpResponse response = httpClient.execute(httpGet);
            try {
                System.out.println("Response Code : " + response.getStatusLine().getStatusCode());
                String responseBody = EntityUtils.toString(response.getEntity(), "UTF-8");
                System.out.println(responseBody);
            } finally {
                response.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

这段代码使用了Apache HttpClient库来发送一个HTTP GET请求到指定的URL，并打印出响应状态码和内容。代码中包含了异常处理，确保在发生错误时能够优雅地关闭资源。