Java Socket图片文件传输

简单示例：



1：发送端

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 String clientip = "127.0.0.1";
public static int port = 33456;
public static void main(String[] args) {
int length = 0;
byte[] sendBytes = null;
Socket socket = null;
DataOutputStream dos = null;
FileInputStream fis = null;
try {
try {
socket = new Socket();
socket.connect(new InetSocketAddress(clientip, port), 30 * 1000);
dos = new DataOutputStream(socket.getOutputStream());
File file = new File("F:\\img.jpg");
fis = new FileInputStream(file);
sendBytes = new byte[1024 * 4];
while ((length = fis.read(sendBytes, 0, sendBytes.length)) > 0) {
dos.write(sendBytes, 0, length);
dos.flush();
}
} finally {
if (dos != null)
dos.close();
if (fis != null)
fis.close();
if (socket != null)
socket.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

2：接收端

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

public class ServerTcpListener implements Runnable {
public static void main(String[] args) {
try {
final ServerSocket server = new ServerSocket(ClientTcpSend.port);
Thread th = new Thread(new Runnable() {
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) {
}
}
}
});
th.run(); // 启动线程运行
} catch (Exception e) {
e.printStackTrace();
}
}

public void run() {
}

public static void receiveFile(Socket socket) {
byte[] inputByte = null;
int length = 0;
DataInputStream dis = null;
FileOutputStream fos = null;
try {
try {
dis = new DataInputStream(socket.getInputStream());
fos = new FileOutputStream(new File("E:\\img22.jpg"));
inputByte = new byte[1024 * 4];
System.out.println("开始接收数据...");
while ((length = dis.read(inputByte, 0, inputByte.length)) > 0) {
fos.write(inputByte, 0, length);
fos.flush();
}
System.out.println("完成接收");
} finally {
if (fos != null)
fos.close();
if (dis != null)
dis.close();
if (socket != null)
socket.close();
}
} catch (Exception e) {
}
}
}