Java调取底层命令获取主机名（localhostName）

import java.io.BufferedInputStream;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.lang.management.ManagementFactory;

import java.lang.management.RuntimeMXBean;

import java.net.InetAddress;

import java.net.NetworkInterface;

import java.net.UnknownHostException;

import java.util.Enumeration;

import com.comisys.gudong.logging.Logger;

public class RuntimeEnvUtil {

/**
* @author fsl
* @return
*/
//获取本机的主机名
public static String getHostNameM(){
if(logger.isDebugEnabled()){
logger.debug("debug getHostName begin");
}
String name =getHostName();
logger.debug("host name:"+name);

if("localhost".equals(name)){
return getServerIp();
}
if(logger.isDebugEnabled()){
logger.debug("debug getHostName end");
}
return name;

}

public static String getHostName(){
try {
Process p = Runtime.getRuntime().exec("hostname");
BufferedInputStream in = new BufferedInputStream(p.getInputStream());
BufferedReader br = new BufferedReader(new InputStreamReader(in));
 
    String line=null;  
    //只需要取出第一行
    if((line=br.readLine())!=null)  
    {  
      return line;
    }  

    br.close();  
    p.destroy();  
    return line; 

} catch (IOException e) {
  if(logger.isErrorEnabled()){
  logger.error("IOException", e);
  }
}

return null;
}
//获取本地的非127.0.0.1的ip地址
public static String  getServerIp(){
String SERVER_IP=null;
    try {
Enumeration<NetworkInterface> netInterfaces = NetworkInterface.getNetworkInterfaces();
InetAddress ip = null;

while (netInterfaces.hasMoreElements()) {
boolean flag = false;
NetworkInterface ni = (NetworkInterface) netInterfaces
.nextElement();
//判断 接口名字中不包含：的
//System.out.println(ni.getName()+"-----");
logger.debug(ni.getName()+"-----");
if(!ni.getName().contains(":")){
   Enumeration<InetAddress> inetAddresses = ni.getInetAddresses();   
while (inetAddresses.hasMoreElements()) {   
                   ip = inetAddresses.nextElement(); 
                   //!ip.isSiteLocalAddress()    判断信息是否源自本机的ip
               if (!ip.isLoopbackAddress()&& ip.getHostAddress().indexOf(":") == -1) {
SERVER_IP = ip.getHostAddress();
flag = true;
break;
} else {
ip = null;
}  
}
}
 
if(flag){
break;
    }
}
} catch (Exception e) {
logger.error("unknown host",e);
}
     return SERVER_IP;
   }

}