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Server.java

package com.atguigu.nio.zerocopy;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;public class NewIOServer {    public static void main(String[] args) throws Exception {        InetSocketAddress address = new InetSocketAddress(7002);        ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();        ServerSocket serverSocket = serverSocketChannel.socket();        serverSocket.bind(address);        ByteBuffer byteBuffer = ByteBuffer.allocate(4096);        while (true) {            SocketChannel socketChannel = serverSocketChannel.accept();            int readCount = 0;            while (-1 != readCount) {                try {                    readCount = socketChannel.read(byteBuffer);                } catch (Exception e) {                    break;                }                byteBuffer.rewind();            }        }    }}

Client.java

package com.atguigu.nio.zerocopy;import java.io.FileInputStream;import java.net.InetSocketAddress;import java.nio.channels.FileChannel;import java.nio.channels.SocketChannel;public class NewIOClient {    public static void main(String[] args) throws Exception {        SocketChannel socketChannel = SocketChannel.open();        socketChannel.connect(new InetSocketAddress("localhost", 7002));        String filename = "./test.avi";        FileChannel fileChannel = new FileInputStream(filename).getChannel();        long startTime = System.currentTimeMillis();        // 总共字节数        long totalSize = fileChannel.size();        // windows平台最大传送数据包        long max_pkg = 8 * 1024 * 1024;        // 本次传输到的位置        long cur_pos = 0;        long transSize = 0;        // 如果剩余的字节数量 > 8M        while (totalSize > max_pkg) {            // 本次传输的字节数            long tmp = fileChannel.transferTo(cur_pos, max_pkg, socketChannel);            // 传输后剩余字节数            totalSize -= tmp;            // 传输到的位置            cur_pos += tmp;            // 已经传输的大小 用于校验            transSize += tmp;        }        // 如果还有剩余,则将剩余一次性传输        if (totalSize > 0) {            long tmp = fileChannel.transferTo(cur_pos, totalSize, socketChannel);            transSize += tmp;        }        System.out.println("发送的总的字节数=" + transSize + " 耗时=" + (System.currentTimeMillis() - startTime));        fileChannel.close();    }}

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