Add/, indicates the root directory of the server,
Visit: http://localhost:8080/ServletPathDirection/index.jsp, then jump to Http://localhost:8080/servlet/HelloServlet
Do not add/,
Visit: http://localhost:8080/ServletPathDirection/index.jsp, then jump to http://localhost:8080/ServletPathDirection/ Servlet/helloservlet
<body>
<!--access HelloServlet with relative paths--
<!--/servlet/helloservlet First/represents the root of a server--
<a href= "Servlet/helloservlet" > Access helloservlet</a><br>
<!--access HelloServlet using an absolute path, you can use the PATH variable: The path variable represents the root of the project--
<a href= "<%=path%>/servlet/helloservlet" > Access helloservlet</a><br>
</body>
The above is a hyperlink to access the servlet, through the form of access to the same way (the URL address of the action in the form, and the way the hyperlink is exactly the same)
Note: The Url-pattern in Web. XML must begin with a/, where the/indicates the project's root directory
Path jump problem in servlet:
Index file, using relative paths and absolute paths
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