poi操作excel设置数据有效性

private  void setDataValidationList(short firstRow,short endRow,short firstCol, short endCol,String data,HSSFSheet sheet ){
            //设置下拉列表的内容
            String[] textlist=data.split(",");
            for(int i=0;i<textlist.length;i++){
                System.out.println(textlist[i]);
            }
            //加载下拉列表内容
            DVConstraint constraint=DVConstraint.createExplicitListConstraint(textlist);
            //设置数据有效性加载在哪个单元格上。  

            //四个参数分别是：起始行、终止行、起始列、终止列
           CellRangeAddressList regions=new CellRangeAddressList(firstRow,endRow,firstCol,endCol);
        /*   CellRangeAddressList regions = new CellRangeAddressList(
                  6,5, 6,5);*/
            //数据有效性对象
            HSSFDataValidation data_validation_list = new HSSFDataValidation(regions, constraint);
            data_validation_list.setSuppressDropDownArrow(false);
            sheet.addValidationData(data_validation_list);
        }