About web in Servlet XML testing

  <servlet-mapping>
    <servlet-name>FileServlet</servlet-name>
    <url-pattern>/fileUpload</url-pattern>
  </servlet-mapping>

Here I configured /fileUpload, Then I tried to access the following paths

http://localhost:8081/maven_tomcat/fileUpload/
http://localhost:8081/maven_tomcat/fileUpload
http://localhost:8081/maven_tomcat/fileUpload/1
http://localhost:8081/maven_tomcat/fileUpload/1.html
http://localhost:8081/maven_tomcat/fileUpload/1/2.html

Only the second can be accessed , Trigger get Method

  <servlet-mapping>
    <servlet-name>FileServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

I try to access the following addresses

http://localhost:8081/maven_tomcat/12.jsp
http://localhost:8081/maven_tomcat/
http://localhost:8081/maven_tomcat/index.jsp
http://localhost:8081/maven_tomcat/12/1.jsp

Only the fourth will be intercepted

Last , Matching /*

  <servlet-mapping>
    <servlet-name>FileServlet</servlet-name>
    <url-pattern>/*</url-pattern>
  </servlet-mapping>

So we can intercept everything