Writer2latex is a java utility to convert openoffice.org/libreoffice documents - in particular documents containing formulas - into other formats. it is actually a collection of four converters, i.e.:
1) writer2latex converts documents into latex 2e format for high quality
typesetting.
2) writer2bibtex extracts bibliographic data from a document and stores it in
bibtex format (works together with writer2latex).
3) writer2xhtml converts documents into xhtml 1.0 or xhtml 1.1+mathml 2.0 with
css2.
4) calc2xhtml is a companion to writer2xhtml that converts calc documents
to xhtml 1.0 with css2 to display your spreadsheets on the web.
this package contains the java library.