如何使用相对路径在项目文件中使用FileWriter创建文件

Question

I am using NetBean and glassFish for developing jsp website and its server. In the server side, I have a java class which generate a text file using FileWriter:

FileWriter writer = new FileWriter("the-file-name.txt", true);

But I found that this file was saved in the directory of glassfish:

C:\\Program Files (x86)\\glassfish-4.0\\glassfish\\domains\\domain1\\config

Also, by checking the path by the code:

Path currentRelativePath = Paths.get("");
String s = currentRelativePath.toAbsolutePath().toString();
System.out.println("Current relative path is: " + s);

the result is also the same with the above path.

How can I get the correct relative path, whether the path of the project or the path of this java file?

Answer 1

This gets the location of the class/jar you are running:

String path = System.getProperty("user.dir");

The string path holds the absolute directory, and using somthing like
path = path.replace("jars", ""); , you can find the root directory for the application. For example, if the jar is in the directory C:\\Program Files\\Example\\jars , this would set path to
C:\\Program Files\\Example\\

Answer 2

In Servlet

String filePath = getServletContext().getRealPath("/").replace("\\", "/");

In JSP

String filePath = session.getServletContext().getRealPath("/").replace("\\", "/");