web.xml 解析

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    <servlet>
        <servlet-name>RequestInfoServlet</servlet-name>
        <servlet-class>com.zdd.servlets.RequestInfoServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>RequestInfoServlet</servlet-name>
        <url-pattern>/servlets/RequestInfoServlet</url-pattern>
    </servlet-mapping>
</web-app>

• servlet-mapping

  • servlet-name

    和servlet标签中的servlet-name相对应

  • url-pattern

    我们访问的路径url 根据servlet-name中的值找到对应的servlet标签中对应的servlet类

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