java - Replace default namespace value from large xml -


i have large xml file has default namespace value. how can replace value without loading entire file in memory using java?

<?xml version="1.0" encoding="utf-8" standalone="yes"?> <customer xmlns="http://www.example.org/package">     <id>123</id> </customer>

should become

<?xml version="1.0" encoding="utf-8" standalone="yes"?> <customer xmlns="http://www.example.org/another">     <id>123</id> </customer>

there's "hacky" way: stream file (using reader , "utf-8" charset) , string replacement.

the "real" way use sax or preferably stax. can use xmleventreader , xmleventwriter stream through xml , manipulate without ever loading whole thing in memory. when element events wrong namespace, create new element events right namespace , pass them along writer.


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