如何使用POI解析Excel文件中的UTF-8字符

I have been using POI to parse XLS and XLSX files successfully. However, I am unable to correctly extract special characters, such as UTF-8 encoded characters like Chinese or Japanese, from an Excel spreadsheet. I have figured out how to extract data from a UTF-8 encoded csv or tab delimited file, but no luck with the Excel file. Can anyone help?I have been using POI to parse XLS and XLSX fil