java socket 发送文件

http://www.cnblogs.com/feiyun126/p/3921466.html

package tt;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.InetSocketAddress;
import java.net.Socket;

public class ClientTcpSend {

public static void main(String[] args) {
int length = 0;
byte[] sendByte = null;
Socket socket = null;
DataOutputStream dout = null;
FileInputStream fin = null;
try {
try {
socket = new Socket();
socket.connect(new InetSocketAddress("127.0.0.1", 33456),10 * 1000);
dout = new DataOutputStream(socket.getOutputStream());
File file = new File("E:\\TU\\DSCF0320.JPG");
fin = new FileInputStream(file);
sendByte = new byte[1024];
dout.writeUTF(file.getName());
while((length = fin.read(sendByte, 0, sendByte.length))>0){
dout.write(sendByte,0,length);
dout.flush();
}
} catch (Exception e) {

} finally{
if (dout != null)
dout.close();
if (fin != null)
fin.close();
if (socket != null)
socket.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}

}

package test;

import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

public class ServerTcpListener implements Runnable {

@Override
public void run() {

}

public static void main(String[] args) {
try {
final ServerSocket server = new ServerSocket(33456);
Thread th = new Thread(new Runnable() {

@Override
public void run() {
while (true) {
try {
System.out.println("开始监听。。。");
Socket socket = server.accept();
System.out.println("有链接");
receiveFile(socket);
} catch (Exception e) {
e.printStackTrace();
}
}

}

});
th.run();
} catch (Exception ex) {
ex.printStackTrace();
}
}

public static void receiveFile(Socket socket) throws IOException {
byte[] inputByte = null;
int length = 0;
DataInputStream din = null;
FileOutputStream fout = null;
try {
din = new DataInputStream(socket.getInputStream());

fout = new FileOutputStream(new File("E:\\"+din.readUTF()));
inputByte = new byte[1024];
System.out.println("开始接收数据...");
while (true) {
if (din != null) {
length = din.read(inputByte, 0, inputByte.length);
}
if (length == -1) {
break;
}
System.out.println(length);
fout.write(inputByte, 0, length);
fout.flush();
}
System.out.println("完成接收");
} catch (Exception ex) {
ex.printStackTrace();
} finally {
if (fout != null)
fout.close();
if (din != null)
din.close();
if (socket != null)
socket.close();
}
}

}