在最新的POI组件中的HSSFCell的setEncoding方法是不是已经删了
"setEncoding was marked as deprecated in Jan 2006 and was removed from HSSFCell in Aug 2008.
POI HSSF automatically handles Unicode without forcing the encoding. Just remove calls to
setEncoding from JasperReports, it is not needed."

www.nabble.com论坛上找的一段话，3.2已经自动Unicode处理了。