client.java

java 写的文件传输实现

package Demo;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

public class Client {
	public static void main(String[] args) throws Exception {
		
		System.out.println("client start to get file...");
		
		// 使用本地文件系统接受网络数据并存为新文件
		File file = new File("D:"+File.separator+"22.rar");
		file.createNewFile();
		RandomAccessFile raf = new RandomAccessFile(file, "rw");
		
		// 通过Socket连接文件服务器
		Socket server = new Socket(InetAddress.getLocalHost(), 3108);
		// 创建网络接受流接受服务器文件数据
		InputStream netIn = server.getInputStream();
		InputStream in = new DataInputStream(new BufferedInputStream(netIn));

		// 创建缓冲区缓冲网络数据
		byte[] buf = new byte[2048];
		int num = in.read(buf);

		while (num != (-1)) {// 是否读完所有数据
			raf.write(buf, 0, num);// 将数据写往文件
			raf.skipBytes(num);// 顺序写文件字节
			num = in.read(buf);// 继续从网络中读取文件
		}

		in.close();
		raf.close();	
		
		
		System.out.println("client get file complete!");

	}

}