This week's book giveaway is in the Programmer Certification forum. We're giving away four copies of OCP Oracle Certified Professional Java SE 11 Programmer I Study Guide: Exam 1Z0-815 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
I don't know of any tools to make an ipr into an eclipse project, though since both are XML files, an XSLT file could probably manage it - I did do one that build basic project info from an Ant build.xml
Fortunately, other than the project files themselves, pretty much any project that was developed under IntelliJ can be made to develop under Eclipse, with no change (and vice versa). Just take the project source directory, do an Eclipse "New Java Project" operation and point it to your project sourcfe directory. Eclipse will make a pretty intelligent guess as to your source directories, so all that's left is to tell it where the output class directories are and to tag the libraries.
Being persecuted doesn't in any way prove your righteousness or your beliefs. Many people get persecuted because they are repugnant or annoying. Or just because they can be.
He repaced his skull with glass. So you can see his brain. Kinda like this tiny ad: