JAVA aio简单使用
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使用aio，实现客户端和服务器 对一个数进行轮流累加
//服务器端
public class Server {
private static ExecutorService executorService = Executors.newFixedThreadPool(4);
public static void main(String[] args) {
try {
AsynchronousChannelGroup group=AsynchronousChannelGroup.withThreadPool(executorService);
AsynchronousServerSocketChannel server=AsynchronousServerSocketChannel.open(group);
server.bind(new InetSocketAddress(8881));
server.accept(null, new CompletionHandler<AsynchronousSocketChannel, Object>() {
@Override
public void completed(AsynchronousSocketChannel client, Object attachment) {
server.accept(null, this);
try {
System.out.println("服务器收到客户端"+client.getRemoteAddress().toString());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ByteBuffer buffer=ByteBuffer.allocate(1024);
client.read(buffer, buffer, new CompletionHandler<Integer, ByteBuffer>() {
@Override
public void completed(Integer index, ByteBuffer buffer) {
try {
buffer.flip();
int i=buffer.getInt(0);
System.out.println(Thread.currentThread().getName()+" 服务器收到客户端消息"+client.getRemoteAddress().toString()+ " "+i);
buffer.putInt(0, i+1);
client.write(buffer).get();//这个是异步的，一定要用get 确保执行结束 才能clear
buffer.clear();
client.read(buffer,buffer,this);
}catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void failed(Throwable exc, ByteBuffer attachment) {
throw new RuntimeException(exc.getMessage());
}
});
}
@Override
public void failed(Throwable exc, Object attachment) {
throw new RuntimeException(exc.getMessage());
}
});
while(true) {
Thread.sleep(2000);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}//客户端
public class Client {
public static void main(String[] args) {
try {
AsynchronousSocketChannel client=AsynchronousSocketChannel.open();
client.connect(new InetSocketAddress("127.0.0.1", 8881), null, new CompletionHandler<Void, Object>() {
@Override
public void completed(Void result, Object attachment) {
System.out.println("连接服务器成功");
ByteBuffer buffer=ByteBuffer.allocate(1024);
buffer.putInt(0,1);
try {
client.write(buffer).get();
} catch (InterruptedException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (ExecutionException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
buffer.clear();
client.read(buffer, buffer, new CompletionHandler<Integer, ByteBuffer>() {
@Override
public void completed(Integer result, ByteBuffer buffer) {
try {
//System.out.println("result="+result+" postition="+buffer.position()+" limit="+buffer.limit());
buffer.flip();
int i=buffer.getInt(0);
System.out.println("客户端收到服务器返回的消息"+client.getRemoteAddress().toString()+" "+i);
buffer.putInt(0, i+1);
Thread.sleep(2000);
client.write(buffer).get();
buffer.clear();
client.read(buffer, buffer, this);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void failed(Throwable exc, ByteBuffer attachment) {
throw new RuntimeException(exc.getMessage());
}
});
}
@Override
public void failed(Throwable exc, Object attachment) {
throw new RuntimeException(exc.getMessage());
}
});
while(true) {
Thread.sleep(2000);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
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