客户端：import java.io.BufferedInputStream;import java.io.FileInputStream;import java.io.InputStream;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;public class SendPicture {public static void main(String[] args) throws Exception {         DatagramSocket socket=new DatagramSocket(8880);         InetAddress ia=InetAddress.getLocalHost();//传给自己的ip         //要发送给的服务器ip：InetAddress ia=InetAddress.getByName("192.168.10.62");         DatagramPacket dp=null;         InputStream is=new FileInputStream("e:\\aa\\DSC_7949.jpg");         BufferedInputStream bs=new BufferedInputStream(is);         byte[] a=new byte[1024];         int len=-1;         while((len=bs.read(a))!=-1){         dp=new DatagramPacket(a, a.length,ia,8881);         socket.send(dp);         }         is.close();         socket.close();}}服务端接收数据：import java.io.BufferedOutputStream;import java.io.FileOutputStream;import java.io.OutputStream;import java.net.DatagramPacket;import java.net.DatagramSocket;public class ReceverPicture {public static void main(String[] args) throws Exception {  DatagramSocket socket=new DatagramSocket(8881);  byte[] b=new byte[1024];  DatagramPacket dp=new DatagramPacket(b, b.length);  OutputStream os=new FileOutputStream("e:\\DSC_7949.jpg");  BufferedOutputStream bo=new BufferedOutputStream(os);  int len=-1;  while(b.length!=0){ socket.receive(dp);  byte[] a=dp.getData(); bo.write(a); bo.flush();  }  bo.close();  os.close();  socket.close();}}