web.xml定義錯誤或異常頁面的友好界面顯示

 
	<error-page>
		<error-code>403</error-code>
		<location>/noPermission.jsp</location>
	</error-page>
	<error-page>
		<error-code>404</error-code>
		<location>/noFound.jsp</location>
	</error-page>
	<error-page>
		<error-code>500</error-code>
		<location>/serverError.jsp</location>
	</error-page>

	<!-- java.lang.Exception異常錯誤,依據這個標記可定義多個類似錯誤提示 -->
	 
	<error-page>
		<exception-type>java.lang.Exception</exception-type>
		<location>/serverError.jsp</location>
	</error-page>
	
	<!-- java.lang.NullPointerException異常錯誤,依據這個標記可定義多個類似錯誤提示 -->
	 
	<error-page>
		<exception-type>java.lang.NullPointerException</exception-type>
		<location>/serverError.jsp</location>
	</error-page>
	<error-page>
		<exception-type>javax.servlet.ServletException</exception-type>
		<location>/serverError.jsp</location>
	</error-page>