String sourcefile = path;
InputStream is = new FileInputStream(sourcefile);
Workbook rwb = Workbook.getWorkbook(is);
String sourcefile = path; //設置文件路徑
InputStream is = new FileInputStream(sourcefile); //打開文件流
Workbook rwb = Workbook.getWorkbook(is); //把文件流傳給Workbook對象,打開工作薄