NIO ServerSocketChannel

ServerSocketChannel用于监听新进来的tcp连接。

1，打开ServerSocketChannel：

ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();serverSocketChannel.socket().bind(new InetSocketAddress(9999));

2,，关闭ServerSocketChannel:

serverSocketChannel.close();

3，监听新进来的连接：

while(true){    SocketChannel socketChannel = serverSocketChannel.accept();    //do something...}

4，非阻塞的监听，accept()会立即返回，如果没有连接，返回null

ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();serverSocketChannel.socket().bind(new InetSocketAddress(9999));serverSocketChannel.configureBlocking(false);while(true){    SocketChannel socketChannel = serverSocketChannel.accept();    if(socketChannel!=null){        //do something...    }}