jianglilili / jianglilili/Java-Web

JSP的运行原理

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Description

- jsp只是对Servlet的一层封装。Jsp页面先翻译成Servlet,然后再编译加载进内存的

![image](https://user-images.githubusercontent.com/46592435/55289667-cf389780-53fb-11e9-99ad-51cb718f9770.png)

- 如果是第一次访问该jsp文件,web服务器就会把shouTime.jsp翻译成一个Servlet:showTime_jsp.java,再将其编译成一个showTime_jsp.class,然后把class加载到内存。
如果是第二次或是以后访问,它就会直接访问内存中的实例了

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