ServerSocketChannel是一个可以监听进来的TCP连接的通道,就像标准IO的ServerSocket一样。ServerSocketChannel类在java.nio.channels包中。
ServerSocketChannel serverSocketChannel = ServerSocketChannel.open(); serverSocketChannel.socket().bind(new InetSocketAddress(9999)); while(true){ SocketChannel socketChannel = serverSocketChannel.accept(); //do something with socketChannel... }
打开 ServerSocketChannel
通过调用 ServerSocketChannel.open() 方法来打开ServerSocketChannel.如:
ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
关闭 ServerSocketChannel
通过调用ServerSocketChannel.close() 方法来关闭ServerSocketChannel. 如:
serverSocketChannel.close();
监听新进来的连接
通过 ServerSocketChannel.accept() 方法监听新进来的连接。当 accept()方法返回的时候,它返回一个包含新进来的连接的 SocketChannel。因此, accept()方法会一直阻塞到有新连接到达。
通常不会仅仅只监听一个连接,在while循环中调用 accept()方法. 如下面的例子:
while(true){ SocketChannel socketChannel = serverSocketChannel.accept(); //do something with socketChannel... }
当然,也可以在while循环中使用除了true以外的其它退出准则。
非阻塞模式
ServerSocketChannel可以设置成非阻塞模式。在非阻塞模式下,accept() 方法会立刻返回,如果还没有新进来的连接,返回的将是null。 因此,需要检查返回的SocketChannel是否是null.如:
ServerSocketChannel serverSocketChannel = ServerSocketChannel.open(); serverSocketChannel.socket().bind(new InetSocketAddress(9999)); serverSocketChannel.configureBlocking(false); while(true){ SocketChannel socketChannel = serverSocketChannel.accept(); if(socketChannel != null){ //do something with socketChannel... } }
转载自并发编程网 – ifeve.com本文链接地址: Java NIO系列教程(九) ServerSocketChannel