一个简单的文件传送代码

 import java.io.*;
　　import java.net.*;

　　public class Server
static final int size = 10240; 
static String DiskInfoXML = usrDir + "disk_info.xml";

　　 public static void main(String argv)
DatagramSocket sd = null; 
String diskRequest; 
try 
sd = new DatagramSocket(7777); //建立socket连接 
while (true) //一直监听 
byte buffer = new byte[size]; 
sd.receive(packet); 
int port = packet.getPort(); 
InetAddress address = packet.getAddress(); 
System.out.println( "diskRequest = "n" + diskRequest); 
fout.write(buffer,0,len); //写进文件 
System.out.println(len+ " bytes received");
} 
{ 
} 
{ 
} 
}

　　/************************* Client *******************************
import java.io.*;

　　public class Client
public static void main(String argv) 
try 
int bufferSize = 1024; 
int remotePort=7777; 
String diskInfoXML = usrDir + "disk_info.xml";
FileInputStream fr = new FileInputStream(f); 
Long l=Long.valueOf(f.length()); 
byte buffer = new byte[len]; 
for(int i=0;i System.out.print((char)buffer); 
Socket sd = new Socket(remoteHost, remotePort,false); 
OutputStream out = sd.getOutputStream(); 
out.flush(); 
catch (IOException e) 
System.out.println(e.toString()); 
System.out.println( "Send OK ...");