java文件上传功能
꧁এ悲宸๓₯㎕ 人气:0文件上传的步骤:
服务器端步骤:
1、创建ServerSocket
2、调用accept获得客户端Socket
3、定义字节数组
4、创建文件输出流,获得客户端输入流
5、循环读取输入流的字节,写入到文件输出流
客户端步骤:
1、创建Socket
2、获得socket对象输出流
3、创建文件输入流
4、循环读取文件输入流字节,写入到输出流
代码实现:
服务器端:
public class FileServer { public static final int PORT = 8888; public static final String PATH = "D:\\upload\\"; public void start(){ System.out.println("start..."); try ( //创建服务器端对象 ServerSocket server = new ServerSocket(PORT);){ while (true){ Socket socket = server.accept(); try ( //创建文件输出流和网络输入流 DataInputStream in = new DataInputStream(socket.getInputStream()); //读取哭护短发来的文件名,创建文件输出流 FileOutputStream out = new FileOutputStream(PATH+in.readUTF())){ int len = 0; byte[] buffer = new byte[1024]; while ((len = in.read(buffer)) != -1){ out.write(buffer,0,len); } System.out.println("服务器保存完毕!"); } } } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) { new FileServer().start(); } }
客户端:
public class FileClient { /** * 发送文件 */ public void sendFile(String ip,int port,String path){ File file = new File(path); try ( //创建连接,创建文件输入流,网络输出流 Socket socket = new Socket(ip,port); InputStream in = new FileInputStream(path); DataOutputStream out = new DataOutputStream(socket.getOutputStream())){ //先发送文件给服务器 out.writeUTF(file.getName()); out.flush(); //读取本地文件,写入到网络输出流中 int len = 0; byte[] buffer = new byte[1024]; while ((len = in.read(buffer)) != -1){ out.write(buffer,0,len); } System.out.println("客户端发送完毕!"); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) { new FileClient().sendFile("192.168.31.226",8888,"C:\\Users\\admin\\Desktop\\C.txt"); } }
实现效果:
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