Java UDP发送工具类UdpUtils

UDP发送类
属于那种发完就跑的
一些不要求接收的，发送频率也不大的就用这个好点
也可以参考下，具体的发送流程

package utils;

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class UdpUtils
{
	public static void send( String ip, int port, String msg )
	{
		byte[] bytes = null;
		try { bytes = msg.getBytes("utf8"); } 
		catch( Exception e) {bytes = null;}
		
		if( bytes != null ) send(ip, port, bytes);
	}
	
	public static void send( String ip, int port, byte[] bytes )
	{
		send(ip, port, bytes, 0, bytes.length);
	}
	
	public static void send( String ip, int port, byte[] bytes, int offset, int len )
	{
		try
		{
			DatagramSocket ds = new DatagramSocket();
			DatagramPacket pack = new DatagramPacket(bytes, 0, len, InetAddress.getByName(ip), port);
			ds.send(pack);
			ds.close();
		} catch (Exception e)
		{
			e.printStackTrace();
		}
	}
}