IntelliJ IDEA stopped supporting the Resin Plugin after version 2023.2. Although JSR 45 can be used as an alternative, it's not as convenient as direct support.
Today I found a plugin resin_idea on GitHub. After manually installing the jar file, the Resin plugin can now be used in IDEA, making debugging classes and JSPs much more convenient.

I tested this with version 2024.2.0.2.

chao2hang/resin_idea: Resin plugin available for IDEA
✅ Download: Releases · chao2hang/resin_idea