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);        }