/**
* 处理网络事件
*
* @param key
* @throws IOException
*/
private static void handle(SelectionKey key, Selector selector) throws IOException {
if (key.isValid()) {
if (key.isAcceptable()) {
// 1、客户端请求连接事件(对应：serverChannel.register(selector, SelectionKey.OP_ACCEPT))
ServerSocketChannel serverChannel = (ServerSocketChannel) key.channel();
// 2、接受并得到客户端连接
SocketChannel channel = serverChannel.accept();
// 3、设置为非阻塞模式
channel.configureBlocking(false);
// 4、得到客户端连接后，并不立即读取io,而是把客户端连接注册到多路复用器上,并监听读io事件
channel.register(selector, SelectionKey.OP_READ);
}
if (key.isReadable()) {
// 处理io读事件，(对应：channel.register(selector, SelectionKey.OP_READ);)
SocketChannel channel = (SocketChannel) key.channel();
ByteBuffer buffer = ByteBuffer.allocate(1024);
// 把客户端请求数据读到buffer中
int readBytes = channel.read(buffer);
if (readBytes > 0) {
buffer.flip();
byte[] bytes = new byte[buffer.remaining()];
buffer.get(bytes);
// 得到输入的字符串
String inputStr = new String(bytes, CharsetUtil.UTF_8);
System.out.println("收到的输入：" + inputStr);
// 把了输入的字符串写回客户端
if (!StringUtil.isNullOrEmpty(inputStr)) {
byte[] resp = inputStr.getBytes(CharsetUtil.UTF_8);
ByteBuffer wBuffer = ByteBuffer.allocate(resp.length);
wBuffer.put(resp);
wBuffer.flip();
// 写回客户端
channel.write(wBuffer);
}
}
}
}
}
