Servlet (iv) servlet mapping URL

1. servlet mapping can be multi-layered and diverse

Example:

    <servlet>        <servlet-name>HServlet</servlet-name>        <servlet-class> com.hunhun.hservlet</servlet-class>    </servlet>    <servlet-mapping>        < servlet-name>hservlet</servlet-name>        <url-pattern>/HServlet</url-pattern>         <!-- <url-pattern>/abc.html</url-pattern>         <!--  <url-pattern>/hservlet/abc</ Url-pattern>-    </servlet-mapping>

2. Servlets can be mapped to multiple URLs

    <servlet>        <servlet-name>FirstServlet</servlet-name>        <servlet-class> com.hunhun.firstservlet</servlet-class>    </servlet>    <servlet-mapping>        < Servlet-name>firstservlet</servlet-name>        <url-pattern>/FirstServlet</url-pattern>    </servlet-mapping>    <servlet-mapping>        <servlet-name>firstservlet</ servlet-name>        <url-pattern>/GServlet</url-pattern>    </servlet-mapping>    < servlet-mapping>        <servlet-name>FirstServlet</servlet-name>        <url-pattern>/ Hservlet</url-pattern>    </servlet-mapping>

Access to Firstservlet via browser Url:http://localhost:8080/myweb/firstservlet|gservlet|hservlet
3. Servlets can be mapped using wildcard characters (only two formats available)

(1) Use *. extension

    <servlet>        <servlet-name>FirstServlet</servlet-name>        <servlet-class> com.hunhun.firstservlet</servlet-class>    </servlet>    <servlet-mapping>        < servlet-name>firstservlet</servlet-name>        <url-pattern>*.do</url-pattern>    </ Servlet-mapping>

Access to Firstservlet via browser url:http://localhost:8080/myweb/abc.do

(2) Use/start/* End

    <servlet>        <servlet-name>FirstServlet</servlet-name>        <servlet-class> com.hunhun.firstservlet</servlet-class>    </servlet>    <servlet-mapping>        < servlet-name>firstservlet</servlet-name>        <url-pattern>/*</url-pattern>    </ Servlet-mapping>

Multiple mapping wildcard principles

(1) Priority matching with high similarity

(2) *. Extension matches the lowest priority

Servlet (iv) servlet mapping URL