[Java] obtain various paths in a web project

Take the project name/demoweb as an example:
The accessed JSP is: http: // localhost: 8080/demoweb/test/index. jsp.

1. Obtain the relative and absolute paths of the current application in JSP.

(1) obtain the Project name: request. getcontextpath ()

Result:/demoweb

(2) obtain the full path of the current page containing the Project name: request. getrequesturi ()

Result:/demoweb/test/testpath. jsp

(3) obtain the address in the IE Address Bar: request. getrequesturl ()

Result: http: // localhost: 8080/demoweb/test/testpath. jsp

(4) obtain the full name in the directory where the current page is located: request. getservletpath ()

Result:/test/testpath. jsp

(5) obtain the full path (actual path) of the server where the page is located: application. getrealpath ("testpath. jsp ")

Result: D: \ develop files \ apache-Tomcat-5.5.15 \ apache-Tomcat-5.5.15 \ webapps \ demoweb \ testpath. jsp

D: \ develop files \ apache-Tomcat-5.5.15 \ apache-Tomcat-5.5.15 is the installation path of Tomcat.

2. Methods for obtaining relative paths and absolute paths in Java class

(1) absolute path of the class:

System. Out. println (testpath. Class. getresource ("/"). getpath ());

Result:/E:/workspace/workspace_tcc/demoweb/webroot/WEB-INF/classes/

System. Out. println (testpath. Class. getresource (""));

Result: file:/E:/workspace/workspace_tcc/demoweb/webroot/WEB-INF/classes/demo1/

(2) obtain the project path: system. getproperty ("user. dir ")

Result: e: \ workspace \ workspace_tcc \ demoweb

The following is a link to the Java path:

Java path Summary

Java relative path/absolute path Summary ()