05-Web.xml解读
作者:互联网
Web.xml解读
<servlet>
<!-- 起的别名 -->
<servlet-name>HelloServlet</servlet-name>
<!-- servlet程序的全类名 -->
<servlet-class>com.tian.servlet.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<!-- 告诉服务器,我配置的地址是给哪个servlet程序使用 -->
<servlet-name>HelloServlet</servlet-name>
<!-- 访问地址 -->
<url-pattern>/hello</url-pattern>
<!-- / 斜杠在服务器解析的时候 地址为 http://ip:port/工程路径
/hello 表示地址为 http://ip:port/工程路径/hello
-->
</servlet-mapping>
Mapping问题
-
一个Servlet可以指定一个映射路径
<servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>com.tian.servlet.HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>/helloServlet</url-pattern> </servlet-mapping>
-
一个Servlet可以指定多个映射路径
<servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>com.tian.servlet.HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>/helloServlet</url-pattern> </servlet-mapping> <servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>com.tian.servlet.HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>/helloServlet1</url-pattern> </servlet-mapping>
-
一个Servlet可以指定通用映射路径
<servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>com.tian.servlet.HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping>
-
指定一些后缀或者前缀等等…
//注意点,*前面不能加项目映射的路径 <servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>com.tian.servlet.HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping>
优先级问题
- 指定了固有的映射路径优先级最高,如果找不到就会走默认的处理请求
<!-- 404 -->
<servlet>
<servlet-name>ErrorServlet</servlet-name>
<servlet-class>com.tian.servlet.ErrorServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ErrorServlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
标签:xml,Web,映射,05,com,路径,tian,servlet,HelloServlet 来源: https://blog.csdn.net/xixihaha_coder/article/details/119077658