String path="";
String path2="";
File file = new File(path);
File file2 = new File(path2);
1.Workbook wb = jxl.Workbook.getWorkbook(file);//读取excel,这个读取到的只能进行读取操作,无法修改文件
2.WritableWorkbook workbook = jxl.Workbook.createWorkbook(file2,wb,new WorkbookSettings());//通过读取到的excel创建新的excel,可以修改