web.xml 錯誤頁面的配置

 
<error-page>
<error-code>404</error-code>
<location>/jsp/error/err404.jsp</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/jsp/error/err500.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>/jsp/error/err500.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>/jsp/error/err500.jsp</location>
  </error-page>
  <error-page>
   <exception-type>javax.servlet.ServletException</exception-type>
   <location>/jsp/error/err500.jsp</location>
  </error-page>