Java 基于tcp协议实现文件上传

服务端

package lesson02;

import java.io.*;

import java.net.ServerSocket;

import java.net.Socket;

/**

* 服务端接收文件

*/

public class TcpServerDemo2 {

public static void main(String[] args) throws IOException {

//1、创建服务

ServerSocket serverSocket = new ServerSocket(9000);

//2、监听客户端的连接

Socket socket = serverSocket.accept();//阻塞式监听,会一直等待客户端连接

//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);

}

//通知客户端我接收完毕了

OutputStream os = socket.getOutputStream();

os.write("我接收完毕了,你可以断开了".getBytes());

//5、关闭资源

fos.close();

is.close();

socket.close();

serverSocket.close();

}

}

客户端

package lesson02;

import java.io.*;

import java.net.InetAddress;

import java.net.Socket;

/**

* 客户端上传文件

*/

public class TcpClientDemo2 {

public static void main(String[] args) throws Exception {

//1、创建一个Socket连接

Socket socket = new Socket(InetAddress.getByName("127.0.0.1"), 90000);

//2、创建一个输出流

OutputStream os = socket.getOutputStream();

//3、读取文件

FileInputStream fis = new FileInputStream(new File("toux.jpg"));

//4、写出文件

byte[] buffer = new byte[1024];

int len;

while ((len = fis.read(buffer)) != -1){

os.write(buffer, 0, len);

}

//通知服务器,我已经结束了

socket.shutdownOutput(); //我已经传输完了

//确定服务器接收完毕,才能够断开连接

InputStream inputStream = socket.getInputStream();

//Sting 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());

//5、关闭资源

fis.close();

os.close();

socket.close();

}

}

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