TCP实现文件上传
客户端：
package tcp;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
public class TcpFileUploadClient {
public static void main(String[] args) throws UnknownHostException, IOException {
//1、创建Socket链接
Socket socket= new Socket(InetAddress.getByName(“127.0.0.1”), 9000);
//2、创建一个输出流
OutputStream os=socket.getOutputStream();
//3、读取文件
FileInputStream fis=new FileInputStream(new File(“liulei.jpg”));
//4、写出文件
byte[] buffer=new byte[1024];
int len;
while ((len=fis.read())!=-1) {
os.write(buffer, 0, len);
}
//通知服务器，已经传输完毕
socket.shutdownOutput();//已经传输完了
//确定服务器接收完毕，断开连接
InputStream inputStream=socket.getInputStream();
//String byte[]
ByteArrayOutputStream baos=new ByteArrayOutputStream();
byte[]buffer2=new byte[1024];
int len2;
while((len2=inputStream.read(buffer2))!=-1) {
baos.write(buffer2, 0, len2);
}
System.out.println(baos.toString());
//关闭资源
baos.close();
inputStream.close();
fis.close();
os.close();
socket.close();
}
}
服务端：
package tcp;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class TcpFileUploadServer {
public static void main(String[] args) throws Exception {
//1、创建服务
ServerSocket serverSocket=new ServerSocket(9000);
//2、监听客户端连接
Socket socket=serverSocket.accept();//阻塞式监听，会一直等待客户端链接，连接之后
//3、获取输入流
InputStream is=socket.getInputStream();
//4、文件输出
FileOutputStream fos=new FileOutputStream(new File(“receive.jpg”));
byte[] buffer= new byte[1024];
int len;
while ((len=is.read(buffer))!=-1) {
fos.write(buffer, 0, len);
}
//通知客户端接收完毕
OutputStream os=socket.getOutputStream();
os.write(“接收完毕，请断开链接”.getBytes());
//关闭资源
fos.close();
is.close();
socket.close();
serverSocket.close();
}
}