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| package bhz.aio;
import java.net.InetSocketAddress;
import java.nio.channels.AsynchronousChannelGroup;
import java.nio.channels.AsynchronousServerSocketChannel;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class Server {
//线程池
private ExecutorService executorService;
//线程组
private AsynchronousChannelGroup threadGroup;
//服务器通道
public AsynchronousServerSocketChannel assc;
public Server(int port){
try {
//创建一个缓存池
executorService = Executors.newCachedThreadPool();
//创建线程组
threadGroup = AsynchronousChannelGroup.withCachedThreadPool(executorService, 1);
//创建服务器通道
assc = AsynchronousServerSocketChannel.open(threadGroup);
//进行绑定
assc.bind(new InetSocketAddress(port));
System.out.println("server start , port : " + port);
//进行阻塞
assc.accept(this, new ServerCompletionHandler());
//一直阻塞 不让服务器停止
Thread.sleep(Integer.MAX_VALUE);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
Server server = new Server(8765);
}
}
//ServerCompletionHandler
package bhz.aio;
import java.nio.ByteBuffer;
import java.nio.channels.AsynchronousSocketChannel;
import java.nio.channels.CompletionHandler;
import java.util.concurrent.ExecutionException;
public class ServerCompletionHandler implements CompletionHandler<AsynchronousSocketChannel, Server> {
@Override
public void completed(AsynchronousSocketChannel asc, Server attachment) {
//当有下一个客户端接入的时候 直接调用Server的accept方法，这样反复执行下去，保证多个客户端都可以阻塞
attachment.assc.accept(attachment, this);
read(asc);
}
private void read(final AsynchronousSocketChannel asc) {
//读取数据
ByteBuffer buf = ByteBuffer.allocate(1024);
asc.read(buf, buf, new CompletionHandler<Integer, ByteBuffer>() {
@Override
public void completed(Integer resultSize, ByteBuffer attachment) {
//进行读取之后,重置标识位
attachment.flip();
//获得读取的字节数
System.out.println("Server -> " + "收到客户端的数据长度为:" + resultSize);
//获取读取的数据
String resultData = new String(attachment.array()).trim();
System.out.println("Server -> " + "收到客户端的数据信息为:" + resultData);
String response = "服务器响应, 收到了客户端发来的数据: " + resultData;
write(asc, response);
}
@Override
public void failed(Throwable exc, ByteBuffer attachment) {
exc.printStackTrace();
}
});
}
private void write(AsynchronousSocketChannel asc, String response) {
try {
ByteBuffer buf = ByteBuffer.allocate(1024);
buf.put(response.getBytes());
buf.flip();
asc.write(buf).get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
}
@Override
public void failed(Throwable exc, Server attachment) {
exc.printStackTrace();
}
}
|