使用多線程技術實現只要有一個客戶上傳文件,就開啓一個線程,完成文件的上傳。
TCP通信的客戶端代碼:
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
//模擬C/S服務器上傳文件
//文件上傳到客戶端
public class TCPClient {
public static void main(String[] args) throws IOException {
FileInputStream fis = new FileInputStream("d:\\1.png");
Socket socket = new Socket("127.0.0.1", 8888);
OutputStream os = socket.getOutputStream();
int len = 0;
byte[] bytes = new byte[1024];
while ((len = fis.read(bytes)) != -1){
os.write(bytes, 0, len);
}
socket.shutdownOutput(); //上傳完文件,給服務器寫一個結束標記,不然會發生阻塞狀態
InputStream is = socket.getInputStream();
while ((len = is.read(bytes)) != -1){
System.out.println(new String(bytes, 0, len));
}
fis.close();
os.close();
}
}
TCP通信的服務器端代碼:
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Random;
//文件上傳到服務器端
public class TCPServer {
public static void main(String[] args) throws IOException {
ServerSocket server = new ServerSocket(8888);
//讓服務器一直處於監聽狀態(死循環)
while (true) {
Socket socket = server.accept();
//使用多線程技術,有一個客戶上傳文件,就開啓一個線程,完成文件上傳
new Thread(new Runnable() {
//完成文件上傳
@Override
public void run() {
try {
InputStream is = socket.getInputStream();
File file = new File("d:\\upload");
if (!file.exists()){
file.mkdirs();
}
//自定義文件命名規則:域名 + 毫秒值 + 隨機數
String filename = "hucm" + System.currentTimeMillis() + new Random().nextInt(999999) + ".jpg";
FileOutputStream fos = new FileOutputStream(file + "\\" + filename); // 注意此處的路徑書寫
int len = 0;
byte[] bytes = new byte[1024];
while ((len = is.read(bytes)) != -1) {
fos.write(bytes, 0, len);
}
socket.getOutputStream().write("文件上傳成功".getBytes());
fos.close();
socket.close();
} catch (IOException e) {
System.out.println(e);
}
}
}).start();
}
//server.close();服務器就沒必要關閉
}
}