Can't re-inject Java language in JSP file!
已回答
I tried to inject HTML language into Java string inside <%%> inside JSP (HTML->Java->HTML) but It didn't work, then I couldn't un-inject that. I really don't know how can I achieve that!
How can I fix this and re-inject Java language in JSP file?

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Hello,
Open "File | Settings | Editor | Language Injections", sort by scope and remove injection with HTML language in IDE scope.
There is related issue on YouTrack: https://youtrack.jetbrains.com/issue/IDEA-193949. Please follow it for updates.