Im new to Docx4j and my task is to replace some Text of a docx Template. I read the getting Started Guide of docx4j but I don\'t think I fully understood the whole concept. Well
docx4j source code has been on GitHub for a while now; that svn repository is obsolete.
The equivalent sample is now called VariableReplace. That code is a bit more efficient, but you need to build it yourself, or use a current nightly build.
You'll probably find running VariablePrepare addresses your issue.
The placeholder search and replace code built in to docx4j works just fine, but if you're having issues with placeholders getting broken up by rsid
entities, you need to ensure that you have grammar and spell-checking disabled when saving your "template" (i.e. source) document. This will help prevent your text runs becoming fragmented (note that you might want to disable proof-reading too, as that inserts bookmark tags here there and everywhere).
Once you've done the search and replace and have a new / updated document, you can re-enable spell-checking easily enough. This thread has more on RSIDs: turnoff rsid's spell check & grammar check in generated xml