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Voovan is a java framwork and it not depends on any third-party framework.
There is a newer version: 4.3.8
package org.voovan.network.nio;

import org.voovan.Global;
import org.voovan.network.ConnectModel;
import org.voovan.network.SocketContext;
import org.voovan.network.exception.ReadMessageException;
import org.voovan.network.exception.SendMessageException;
import org.voovan.network.handler.SynchronousHandler;
import org.voovan.network.messagesplitter.TrasnferSplitter;
import org.voovan.tools.TEnv;
import org.voovan.tools.log.Logger;

import javax.net.ssl.SSLException;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.nio.channels.spi.SelectorProvider;

/**
 * NioSocket 连接
 * 
 * @author helyho
 *
 * Voovan Framework.
 * WebSite: https://github.com/helyho/Voovan
 * Licence: Apache v2 License
 */
public class NioSocket extends SocketContext{
	private SelectorProvider provider;
	private Selector selector;
	private SocketChannel socketChannel;
	private NioSession session;
	private NioSelector nioSelector;
	/**
	 * socket 连接
	 * @param host      监听地址
	 * @param port		监听端口
	 * @param readTimeout   超时时间 (milliseconds)
	 * @throws IOException	IO异常
	 */
	public NioSocket(String host,int port,int readTimeout) throws IOException{
		super(host, port, readTimeout);
		this.readTimeout = readTimeout;
		provider = SelectorProvider.provider();
		socketChannel = provider.openSocketChannel();
		socketChannel.socket().setSoTimeout(this.readTimeout);
		session = new NioSession(this);
		connectModel = ConnectModel.CLIENT;
		this.handler = new SynchronousHandler();
	}

	/**
	 * 构造函数
	 * @param parentSocketContext 父 SocketChannel 对象
	 * @param socketChannel SocketChannel 对象
	 */
	protected NioSocket(SocketContext parentSocketContext,SocketChannel socketChannel){
		try {
			provider = SelectorProvider.provider();
			this.host = socketChannel.socket().getLocalAddress().getHostAddress();
			this.port = socketChannel.socket().getLocalPort();
			this.socketChannel = socketChannel;
			socketChannel.configureBlocking(false);
			this.copyFrom(parentSocketContext);
			this.socketChannel().socket().setSoTimeout(this.readTimeout);
			session = new NioSession(this);
			connectModel = ConnectModel.SERVER;
		} catch (IOException e) {
			Logger.error("Create socket channel failed",e);
		}
	}
	
	
	/**
	 * 获取 SocketChannel 对象
	 * @return SocketChannel 对象
	 */
	public SocketChannel socketChannel(){
		return this.socketChannel;
	}
	
	/**
	 * 初始化函数
	 */
	private void init()  {
		try{
			selector = provider.openSelector();
			socketChannel.register(selector, SelectionKey.OP_READ);
		}catch(IOException e){
			Logger.error("init SocketChannel failed by openSelector",e);
		}
	}

	/**
	 * 获取 Session 对象
	 * @return Session 对象
     */
	public NioSession getSession(){
		return session;
	}
	
	private void initSSL() throws SSLException{
		if (connectModel == ConnectModel.SERVER && sslManager != null) {
			sslManager.createServerSSLParser(session);
		} else if (connectModel == ConnectModel.CLIENT && sslManager != null) {
			sslManager.createClientSSLParser(session);
		}
	}
	
	/**
	 * 启动
	 * @throws IOException IO 异常
	 */
	public void start() throws IOException  {

		if(connectModel == ConnectModel.CLIENT) {
			socketChannel.connect(new InetSocketAddress(this.host, this.port));
			socketChannel.configureBlocking(false);
		}

		init();

		initSSL();
		
		//如果没有消息分割器默认使用透传分割器
		if(messageSplitter == null){
			messageSplitter = new TrasnferSplitter();
		}
		
		if(socketChannel!=null && socketChannel.isOpen()){
			nioSelector = new NioSelector(selector,this);
			nioSelector.eventChose();
		}
	}

	/**
	 * 启动同步的上下文连接,同步读写时使用
	 */
	public void syncStart(){

		Global.getThreadPool().execute(new Runnable(){
			public void run() {
				try {
					start();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		});

		//等待连接完成
		int waitConnectTime = 0;
		while(!isConnected()){
			TEnv.sleep(1);
			waitConnectTime++;
			if(waitConnectTime >= readTimeout){
				break;
			}
		}
	}

	@Override
	public boolean isOpen() {
		if(socketChannel!=null){
			return socketChannel.isOpen();
		}else{
			return false;
		}
	}

	@Override
	public boolean isConnected() {
		try {
			if (socketChannel.getRemoteAddress() != null) {
				return true;
			} else {
				return false;
			}
		}catch(Exception e){
			return false;
		}
	}

	/**
	 * 同步读取消息
	 * @return 读取出的对象
	 * @throws ReadMessageException 读取消息异常
	 */
	public Object synchronouRead() throws ReadMessageException {
		return session.syncRead();
	}

	/**
	 * 同步发送消息
	 * @param obj  要发送的对象
	 * @throws SendMessageException  消息发送异常
	 */
	public void synchronouSend(Object obj) throws SendMessageException {
		session.syncSend(obj);
	}

	@Override
	public boolean close(){

		if(socketChannel!=null){
			try{
				socketChannel.close();

				nioSelector.release();
				session.getByteBufferChannel().release();
				if(session.getSSLParser()!=null){
					session.getSSLParser().release();
				}
				return true;
			} catch(IOException e){
				Logger.error("Close SocketChannel failed",e);
				return false;
			}
		}else{
			return true;
		}
	}

}