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I/O??????????????????????????????BIO/NIO/AIO?????Java?????????????????I/O?????????????????Netty????????

??Java I/O??

1. BIO?Blocking IO?

BIO?Java?????I/O????????????????????????????????????BIO??accept?read??????????????????accept???????????????read?????????????????????????????????????????????????????????

2. NIO?Non Blocking IO?

NIO?Java 1.4???????????????????????????????????????????Selector???????????Selector??????I/O?????????????????NIO??????????

• Buffer??????????????????????????
• Channel???????????????
• Selector???????????Channel?I/O???

Epoll?Linux???????????????????????

3. AIO?NIO 2.0?

AIO?Java NIO 2.0??????????NIO???AIO?????????????????????????????????AIO????????????????????????????

??I/O????

1. ??I/O??

??????????????->??->??->??->??????????????????????????????????????????????????????????????

2. Reactor??

Reactor??????????????????I/O???????????Reactor???????????

• ??????Reactor??????????Handler??Selector?
• ???????????Selector???????????
• ??????????Reactor??????????

Reactor???NIO?????????????????

??Netty????

Netty???Reactor???????????????????????????????

• ??????BossGroup?WorkerGroup????????????????
• ChannelPipeline?????????????????
• ChannelHandler????????????????????

Netty???????????????????I/O????????????????

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