使用Java时在Windows上使用'〜'获取短路径

Question

I have created a java application which downloads files from an online source to my local computer which runs windows 7

The code downloads the file but also creates a path for that file so it can be stored in that path

The file then gets converted to another format

The issue that I am having is that it seems that windows don't like it if I navigate to the path using an absolute long path

I am using cmd to navigate to the file which means I am creating processes to do that

My code looks like this

 String[] command =
        {
                "cmd",
        };
        Process p;
        try {
            p = Runtime.getRuntime().exec(command);
            new Thread(new SyncPipe(p.getErrorStream(), System.err)).start();
            new Thread(new SyncPipe(p.getInputStream(), System.out)).start();

            PrintWriter stdOut = new PrintWriter(p.getOutputStream(), true);
            stdOut.println("cd "+strPath);

As you can see above, the last line is just navigating to the path it works for most cases but not when the path is long and has '-' and other characters.

If I am on windows explorer and I click on the path at the navigation bar the path shows but with '~' if I embed the '~' path within this code by setting strPath to the path with the '~' everything works fine

Also if I take the absolute full path from strPath (by printing it to the screen for example) and I open cmd.exe then run the following command

cd <some absolute full path>   <- this works but doesn't work from java 

So I am not sure what I need to do to fix it

Answer 1

You can't (and you don't) use ~ for the home folder (that is a shell expansion). You can use System.getProperty("user.home") - which will return the home folder.