Java NIO 通信

package com.yuan.test;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.Iterator;
import java.util.Set;

public class TestNIO {
	public void selector() throws IOException {
		ByteBuffer buffer = ByteBuffer.allocate(1024);
		Selector selector = Selector.open();
		ServerSocketChannel sscChannel = ServerSocketChannel.open();
		sscChannel.configureBlocking(false);
		sscChannel.socket().bind(new InetSocketAddress(8080));
		sscChannel.register(selector, SelectionKey.OP_ACCEPT);// 註冊監聽事件
		while (true) {
			Set selectKeysSet = selector.selectedKeys();//得到全部的key 集合
			Iterator it = selectKeysSet.iterator();
			while (it.hasNext()) {
				SelectionKey key = (SelectionKey) it.next();
				if ((key.readyOps() & SelectionKey.OP_ACCEPT) == SelectionKey.OP_ACCEPT) {
					ServerSocketChannel sschChannel = (ServerSocketChannel) key
							.channel();
					SocketChannel sChannel = sschChannel.accept();
					sChannel.configureBlocking(false);
					sChannel.register(selector, SelectionKey.OP_READ);
                    it.remove();
				}else if ((key.readyOps()&SelectionKey.OP_READ)==SelectionKey.OP_READ) {
					SocketChannel sc=(SocketChannel)key.channel();
					while(true){
						buffer.clear();
						int n=sc.read(buffer);//讀取數據
						if(n<=0){
							break;
						}
						buffer.flip();
						
					}
					it.remove();
					
				}

			}

		}

	}
}