在本教程中，我们将看到如何获取Ping URL并获得其状态。
我们将使用HTTPURLConnection连接到URL，如果响应代码不是200，则不会连接。

package org.igi.theitroad.client;
 
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
 
/**
 * @author theitroad.com
 * 
 */
 
public class CheckPingStatusOfURLMain {
	public static void main(String args[]) throws Exception {
 
		String status1 = getStatus("https://www.theitroad.com");
		System.out.println("theitroad.com is : " + status1);
 
		String status2 = getStatus("http://www.javablog2.com");
		System.out.println("javablog2.com is : " + status2);
 
	}
 
	public static String getStatus(String url) throws IOException {
 
		String result = "";
		try {
			URL urlObj = new URL(url);
			HttpURLConnection con = (HttpURLConnection) urlObj.openConnection();
			con.setRequestMethod("GET");
                        //Set connection timeout
			con.setConnectTimeout(3000);
			con.connect();
 
			int code = con.getResponseCode();
			if (code == 200) {
				result = "On";
			}
		} catch (Exception e) {
			result = "Off";
		}
		return result;
	}
 
}

运行上面的程序时，我们将得到以下输出：

theitroad is : On
javablog2 is : Off