~~~ package com.youge.nio.zerocopy; /** * @author: hcf * @qq: 46914685 * @email: 46914685@qq.com * @date: 2020/11/27 11:37 */ import java.io.IOException; import java.net.InetSocketAddress; import java.net.ServerSocket; import java.nio.ByteBuffer; import java.nio.channels.ServerSocketChannel; import java.nio.channels.SocketChannel; /** * NIO來傳輸讀寫文件 */ public class NewIOServer { public static void main(String[] args) throws IOException { //創建端口號 InetSocketAddress inetSocketAddress = new InetSocketAddress(7002); //創建serverSocketChannel對象 ServerSocketChannel serverSocketChannel = ServerSocketChannel.open(); //獲取ServerSocket對象 ServerSocket serverSocket = serverSocketChannel.socket(); //綁定端口號 serverSocket.bind(inetSocketAddress); //創建buffer ByteBuffer buffer = ByteBuffer.allocate(4096); while (true) { //獲取客戶端連接過來的socketChannel SocketChannel socketChannel = serverSocketChannel.accept(); int readCount = 0; while (-1 != readCount) { readCount = socketChannel.read(buffer); System.out.println(readCount); buffer.rewind();//倒帶 position =0,mark作廢 } } } } ~~~