求帮忙写个程序
我想一直去连一个IP，也就是PING那个IP地址，求帮忙写个程序一直PINT它，如果连同就打印连接成功，否则打印连接失败。

------解决方案--------------------
public class CommandUtil {

private static final Logger LOGGER = LoggerFactory.getLogger(CommandUtil.class);

public static String exec(String command) {
LOGGER.info("开始执行命令: " + command);
String result = null;
try {
Process process = Runtime.getRuntime().exec(command);
if (process != null) {
result = getExecMessage(process);
// 输出执行记录详情
LOGGER.info(result);
process.destroy();
}
LOGGER.info("执行完毕!");
}
catch (Exception ex) {
LOGGER.error("执行shell命令出现异常, 详情:", ex);
}
return result;
}

public static String exec(String[] cmdarray) {
LOGGER.info("开始执行命令: " + ArrayUtil.toString(cmdarray, "\n"));
String result = null;
try {
Process process = Runtime.getRuntime().exec(cmdarray);
if (process != null) {
result = getExecMessage(process);
// 输出执行记录详情
LOGGER.info(result);
process.destroy();
}
LOGGER.info("执行完毕!");
}
catch (Exception ex) {
LOGGER.error("执行shell命令出现异常, 详情: ", ex);
}
return result;
}

public static String getExecMessage(Process process) {
BufferedReader stream = null;
StringBuilder result = new StringBuilder();
try {
stream = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
while ((line = stream.readLine()) != null) {
result.append(line).append("\n");
NullUtil.toNull(line);
}
LOGGER.info(result.insert(0, "执行详情: ").toString());
// if (process.waitFor() != 0) {
// error = new BufferedReader(new InputStreamReader(process.getErrorStream()));
// while ((line = error.readLine()) != null) {
// buffer.append(line).append("\n");
// NullUtil.toNull(line);
// }
// }
}
catch (Exception ex) {
LOGGER.error("执行错误, 详情: ", ex);
}
finally {
if (stream != null) {
try {
stream.close();
}
catch (IOException e) {}
}
}
return result.toString();
}

public static void main(String[] args) {
System.out.println(exec("ping www.baidu.com"));
}
｝
------解决方案--------------------
大致思路：通过java调用执行shell命令，对返回的结果进行解析，并且通过计算可得出流量。。。你可以百度一下吧
------解决方案--------------------
重点在Runtime.getRuntime().exec("ping xxx");
------解决方案--------------------

Java code

import java.io.IOException;
import java.net.InetAddress;
import java.util.concurrent.Executors;

public class Pinger implements Runnable {
  
  public static void main(String[] args) throws Exception {
    
    Executors.newCachedThreadPool().submit(new Pinger("127.0.0.1", 3000));
  }
  
  private final String ip;
  private final int timeout;
  public Pinger(String ip, int timeout) {
    
    this.ip = ip;
    this.timeout = Math.max(1000, timeout);
  }

  @Override
  public void run() {
    
    try {
      
      while(true) {

        InetAddress inet = InetAddress.getByName(ip);
        
        System.out.print(ip);
        if( inet.isReachable(timeout) )
          System.out.println("连接成功");
        else
          System.out.println("连接失败");
      }
    }
    catch(IOException ex) {
      
      ex.printStackTrace();
    }
  }
}