配置404等错误页面

servelet3采用注释的方式配置servelet无需配置web.xml了,很方便但是我目前配置404,500等出错页面的方式还是采取配置web.xml的形式.

<?xml version="1.0" encoding="ISO-8859-1"?>
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  this work for additional information regarding copyright ownership.
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<web-app xmlns="http://java.sun.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
  version="3.0"
  metadata-complete="false">


  <error-page>
    <error-code>404</error-code>
    <location>/WEB-INF/NotFound.jsp</location>
  </error-page>


</web-app>

Servlet3.0的部署描述文件web.xml的顶层标签<web-app>有一个metadata-complete属性，该属性为true，则容器在部署时只依赖部署描述文件，忽略所有标注，如果不配置该属性，或者将其设置为false，则表示启动标注支持