如何找到Play Framework应用程序的绝对路径？

Question

At the moment I'm working with a team on a Play! Framework app. With the next user story, I have to implement some different file modifications, such as moving a file to a defined directory.

Because we are working on different platforms, I'm not always really sure if the app has the right path. So I want to work with a absolute path of the app directory.

How do I get the absolute path of a Play! app? Is there a method for this?

Answer 1

This answer applies only to older versions of the Play Framework, before v2.

Play has an application path property:

String projectRoot = Play.applicationPath;

This will give you the directory that Play is running from.

I think a better practice is moving the directory outside of your project install directory and placing the path to it in your application.conf as a property. You then retrieve it when needed. For example:

Application.conf:

my.file.path=/tmp/whatever

Code:

String projectRoot = Play.configuration.getProperty("my.file.path");

Answer 2

Since version 2.5.0 , play.Play class is deprecated. It is recommended to inject play.Environment and use the method as follows:

public File rootPath();

The play.Environment singleton also contains some very handy method, which provide files by relative path eg

public File getFile(String relativePath);
public URL resource(String relativePath);
public InputStream resourceAsStream(String relativePath);

Answer 3

截至播放2.0：play.Play.application（）。path（）。getAbsolutePath（）

Answer 4

这些都不适用于我的播放版本，所以我使用了它：Play.current（）。path（）。getAbsolutePath（）