错误页面
在web.xml
<web-app...
	<error-page>
		<error-code>500</error-code>
		<location>/page/error.jsp</location>
...

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在web.xml
<web-app...
	<error-page>
		<exception-type>java.lang.Exception</exception-type>
		<location>/page/error.jsp</location>
...