java - When the action in the form fills in the relative address, why do these two methods have the same effect?

Question

What does this/stand for? It can't be the root directory, right? The name of the project is test

Answer 1

Both methods you use are to submit data to the CServlet address. The first method is just the abbreviation. It will find the sub-files under the root directory.

Answer 2

It should be that the <url-pattern> specified when configuring <servlet-mapping> in web. The web.xml configuration is clear

Answer 3

/ 本来就表示根嘛，不过在这里不是表示的服务器文件系统的根，而是 Web 应用虚拟目录结构的根，也就是 http://somedomain.com/ This "root" position.