【从BIO到Netty】4.NIOchannel简介

package org.scaventz.nio.mine;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class NioFileChannel {
    public static void main(String[] args) throws IOException {
        File file = new File("d:/test.txt");
        FileChannel channel = new FileInputStream(file).getChannel();
        ByteBuffer buffer = ByteBuffer.allocate(4096);
        int i = 0;
        while ((i = channel.read(buffer)) != -1) {
            System.out.println(new String(buffer.array()));
            buffer.clear();
        }
    }
}