Commit 40dd726

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[U] todo内容;bio代码;

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`@@ -145,6 +145,12 @@ SpringCloud源码`
`145`	`145`
`146`	`146`	`todo`
`147`	`147`
	`148`	`+2021年年底完成了人生的两件大事,所以一直没时间持续输出源码分析,2022年开始需要继续努力,完成这个源码分析项目!`
	`149`	`+`
	`150`	`+- 完成Netty剩余源码分析文章`
	`151`	`+- 完成RocketMQ剩余源码分析文章`
	`152`	`+- 完成Dubbo剩余源码分析文章`
	`153`	`+- C语言基础学习(为Redis底层源码学习做准备)`
`148`	`154`	`- Redis底层源码分析`
`149`	`155`	`- JUC底层源码分析`
`150`	`156`

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`@@ -1,6 +1,43 @@`
`1`	`1`	`## 1. 回顾BIO和NIO`
`2`	`2`
`3`		`-show you the code! TODO`
	`3`	+```java
	`4`	`+public class BIO {`
	`5`	`+ public static void main(String[] args) throws Exception {`
	`6`	`+ ServerSocket serverSocket = new ServerSocket(666);`
	`7`	`+ System.out.println("Server started...");`
	`8`	`+ while (true) {`
	`9`	`+ System.out.println("socket accepting...");`
	`10`	`+ Socket socket = serverSocket.accept();`
	`11`	`+ new Thread(new Runnable() {`
	`12`	`+ @Override`
	`13`	`+ public void run() {`
	`14`	`+ try {`
	`15`	`+ byte[] bytes = new byte[1024];`
	`16`	`+ InputStream inputStream = socket.getInputStream();`
	`17`	`+ while (true) {`
	`18`	`+ System.out.println("reading...");`
	`19`	`+ int read = inputStream.read(bytes);`
	`20`	`+ if (read != -1) {`
	`21`	`+ System.out.println(new String(bytes, 0, read));`
	`22`	`+ } else {`
	`23`	`+ break;`
	`24`	`+ }`
	`25`	`+ }`
	`26`	`+ } catch (Exception e) {`
	`27`	`+ e.printStackTrace();`
	`28`	`+ } finally {`
	`29`	`+ try {`
	`30`	`+ socket.close();`
	`31`	`+ } catch (Exception e) {`
	`32`	`+ e.printStackTrace();`
	`33`	`+ }`
	`34`	`+ }`
	`35`	`+ }`
	`36`	`+ }).start();`
	`37`	`+ }`
	`38`	`+ }`
	`39`	`+}`
	`40`	+```
`4`	`41`
`5`	`42`	`BIO流程图如下:`
`6`	`43`

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