Transfer: https://blog.csdn.net/zwj1030711290/article/details/80687365
1. Install svn client
before using myEcplise need only plug-ins, IDEA now need to download the client:
TortoiseSVN (Little Turtle), download and install, and then remember the installation path, I installed the 64's.
Download the TortoiseSVN: https://tortoisesvn.net/downloads.html
After the download is complete and then start the installation run svn
Remember to check in before the installation path to change, for example: F: \ svnClient 
dot expansion triangle next to the fork entry, select the first, click OK, and then is shown: 
when installing the svn client must be checked, otherwise svn integrated in the idea when it will not find svn.exe and error.
Error message: 
If you forget to install checked, then re-run the installation package, select modify, and then check the command line client tools on the line item.
2. Configure the IDEA
After installing the svn client, SVN want to enable the idea of plug-ins also need to look at the idea configuration, file - setting button to open the settings interface or (Ctrl + Alt + S) shortcut keys, as shown below:
Click . OK
to restart at your IntelliJ Idea, and download the project from svn repository: 
after entering the svn address to the project:
Transfer: https://blog.csdn.net/zwj1030711290/article/details/80687365
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I add: I use the latest version of the 2019 IDEA, after installing Subversion, does not require configuration in the IDEA! You can directly use!