How to change a property field in a xml file with java

I hava an xml file in the hard disk.I want at run-time my java application to change a property of the xml file.I just wondering which is the fastest and more lighter procedure? 1)parse the xml file with DOM 2)set the property value in a new document in memory 3)write the new document wi开发者_开发问答th the new property value back in the same file. That is what i am thinking now.Is there any way to avoid step 3 and just load the xml and change the value? Thank you in advance

On alternative is to specify the property change as an XSL transform and run it using one of the Java XSLT implementations.