JSP对象			Servlet对象

out				JspWriter
request			HttpServletRequest
response		HttpServletResponse
session			HttpSession
page			Object
pageContext		PageContext
application		ServletContext
config			ServletConfig
exception		Throwable

九大:
包括 四大属性(四大域)
(page request session application)
out pageContext response config excetion

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内置对象在翻译Servlet能看到..