servlet的web.xml文件的模板

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"

 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

 <servlet>

  <servlet-name>helloServlet</servlet-name>

  <!-- servlet-class:一定要将类的完整的名称写出来 -->

  <servlet-class>web.HelloServlet</servlet-class>

 </servlet>

 <servlet-mapping>

  <servlet-name>helloServlet</servlet-name>

  <url-pattern>/sayHello</url-pattern>

 </servlet-mapping>

</web-app>

 

 

web.xml中错误处理页面的配置

     <error-page>

        <!--方式1 -->

        <error-code>500</error-code>

        <!--方式2

        <exception-type>javax.servlet.ServletException

        </exception-type>

         -->

        <location>/error.html</location>

    </error-page>