Client.java

package nio.asyn;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
import java.net.InetAddress;

/**
 * TCP/IP的NIO非阻塞方式
 * 客户端
 * */
public class Client {

	//创建缓冲区
	private ByteBuffer buffer = ByteBuffer.allocate(512);
	//访问服务器
	public void query(String host,int port) throws IOException{
		InetSocketAddress address = new InetSocketAddress(InetAddress.getByName(host),port);
		SocketChannel socket = null;
	    byte[] bytes = new byte[512];
		while(true){
			try{
				System.in.read(bytes);
				socket = SocketChannel.open();
				socket.connect(address);
				buffer.clear();
				buffer.put(bytes);
				buffer.flip();
				socket.write(buffer);
				buffer.clear();
			}catch (Exception e) {
				e.printStackTrace();
			}finally{
				if(socket!=null){
					socket.close();
				}
			}
		}
	}
	
	public static void main(String[] args) throws IOException{
		new Client().query("localhost", 8099);
		
	}
}