TCP文件上传实现
服务端:
package net.study;
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
public class TcpTransferFileServer {
public static void main(String[] args) throws IOException {
// 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")); // 不加jpg会传出乱码
byte[] buffer = new byte[1024];
int len;
while ((len = is.read(buffer)) != -1){
fos.write(buffer,0,len);
}
// 通知客户端我接受完毕了
OutputStream os = socket.getOutputStream();
os.write("我接受完毕了,你可以断开了".getBytes());
// 5.关闭资源
fos.close();
is.close();
socket.close();
serverSocket.close();
}
}
客户端:
package net.study;
import java.io.*;
import java.net.Socket;
public class TcpTransferFile {
public static void main(String[] args) throws IOException {
// 1.创建一个Socket连接
Socket socket = new Socket("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("cat1.jpg");
// 4.写出文件
byte[] buffer = new byte[1024]; // 资源浪费
int len;
while ((len = fis.read(buffer)) != -1){ // 输入流中还有数据,继续写
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());
// 5.关闭资源
baos.close();
inputStream.close();
fis.close();
os.close();
socket.close();
}
}