JavaWeb拦截器

  <error-page>
        <error-code>400</error-code>
        <location>/error.jsp</location>
    </error-page>
<!-- 404 页面不存在错误 -->
    <error-page>
        <error-code>404</error-code>
        <location>/error.jsp</location>
    </error-page>
   <!-- 500 服务器内部错误 -->
    <error-page>
        <error-code>500</error-code>
        <location>/error.jsp</location>
    </error-page>
    <!-- java.lang.Exception异常错误,依据这个标记可定义多个类似错误提示 -->
    <error-page>
        <exception-type>java.lang.Exception</exception-type>
        <location>/error.jsp</location>
    </error-page>
    <!-- java.lang.NullPointerException异常错误,依据这个标记可定义多个类似错误提示 -->
    <error-page>
        <exception-type>java.lang.NullPointerException</exception-type>
        <location>/error.jsp</location>
    </error-page>
    <error-page>
        <exception-type>javax.servlet.ServletException</exception-type>
        <location>/error.jsp</location>
    </error-page>