初窥java网络io

初窥 Java 网络 IO

DigitalSonic2011-10

同步？异步？阻塞？非阻塞？

UNIX® Network Programming Volume 1, Third Edition: The Sockets Networking

IO in Java

● JDK 1.4 —— NIO● 我们有了 Non-Blocking IO

● JDK 1.7—— NIO2● 我们有了 Asynchronous IO● Linux下通过 epoll模拟实现● Windows下通过 IOCP实现

传统 Socket服务器实现方式

● 用 ServerSocket绑定某个端口● 循环 accept

● 开启一个新线程处理 Socket● 处理完毕后关闭 Socket

NIO – How To

● 非阻塞 ServerSocketChannel绑定端口● 注册选择器● 循环 select

● 处理 select的结果 key● 处理完毕移除 key

NIO范例

AIO – How To

● 配置线程池● AsynchronousServerSocketChannel绑定端口● accept

● 返回 Future做进一步处理● 设定 CompletionHandler，在其中做进一步处理

AIO范例

AIO范例

Start listening on 8888. sun.nio.ch.UnixAsynchronousServerSocketChannelImpl[/0:0:0:0:0:0:0:0:8888]AsynchronousSocketChannel Accepted!sun.nio.ch.UnixAsynchronousSocketChannelImpl[connected local=/0:0:0:0:0:0:0:1:8888 remote=/0:0:0:0:0:0:0:1:48716]sun.nio.ch.UnixAsynchronousSocketChannelImpl[connected local=/0:0:0:0:0:0:0:1:8888 remote=/0:0:0:0:0:0:0:1:48716] said: abcsun.nio.ch.UnixAsynchronousSocketChannelImpl[connected local=/0:0:0:0:0:0:0:1:8888 remote=/0:0:0:0:0:0:0:1:48716] said: exit

初窥java网络io

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