Java AIO 入门实例（转）

最新推荐文章于 2025-08-08 22:01:10 发布

转载最新推荐文章于 2025-08-08 22:01:10 发布 · 77 阅读

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本文介绍了Java7中异步I/O（AIO）的基本使用方法，并通过一个服务端与客户端交互的实例进行演示。服务端采用AsynchronousServerSocketChannel接受连接请求，客户端通过AsynchronousSocketChannel发送数据。

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Java7 AIO入门实例，首先是服务端实现：

服务端代码

SimpleServer:

Java代码

public class SimpleServer {
public SimpleServer(int port) throws IOException {
final AsynchronousServerSocketChannel listener = AsynchronousServerSocketChannel.open().bind(new InetSocketAddress(port));
listener.accept(null, new CompletionHandler<AsynchronousSocketChannel, Void>() {
public void completed(AsynchronousSocketChannel ch, Void att) {
// 接受下一个连接
listener.accept(null, this);
// 处理当前连接
handle(ch);
}
public void failed(Throwable exc, Void att) {
}
});
}
public void handle(AsynchronousSocketChannel ch) {
ByteBuffer byteBuffer = ByteBuffer.allocate(32);
try {
ch.read(byteBuffer).get();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
byteBuffer.flip();
System.out.println(byteBuffer.get());
// Do something
}
}

跟着是客户端实现：

客户端代码

SimpleClient:

Java代码

public class SimpleClient {
private AsynchronousSocketChannel client;
public SimpleClient(String host, int port) throws IOException, InterruptedException, ExecutionException {
this.client = AsynchronousSocketChannel.open();
Future<?> future = client.connect(new InetSocketAddress(host, port));
future.get();
}
public void write(byte b) {
ByteBuffer byteBuffer = ByteBuffer.allocate(32);
byteBuffer.put(b);
byteBuffer.flip();
client.write(byteBuffer);
}
}

写一个简单的测试用例来跑服务端和客户端，先运行testServer()，在运行testClient();

测试用例

AIOTest

Java代码

public class AIOTest {
@Test
public void testServer() throws IOException, InterruptedException {
SimpleServer server = new SimpleServer(7788);
Thread.sleep(10000);
}
@Test
public void testClient() throws IOException, InterruptedException, ExecutionException {
SimpleClient client = new SimpleClient("localhost", 7788);
client.write((byte) 11);
}
}