java poi下拉框值有限制吗,Java源代码:POI操作Excel创建下拉框

public void createListBox (String [] list)

{

//文件初始化

HSSFWorkbook wb = new HSSFWorkbook();

HSSFSheet sheet = wb.createSheet("new sheet");

//在行个单元格，插入下拉框

HSSFRow row = sheet.createRow(0);

HSSFCell cell = row.createCell(0);

//普通写入操作

cell.setCellValue("请选择");//这是实验

//生成下拉列表

//只对(0，0)单元格有效

CellRangeAddressList regions = new CellRangeAddressList(0,0,0,0);

//生成下拉框内容

DVConstraint constraint = DVConstraint.createExplicitListConstraint(list);

//绑定下拉框和作用区域

HSSFDataValidation data_validation = new HSSFDataValidation(regions,constraint);

//对sheet页生效

sheet.addValidationData(data_validation);

//写入文件

FileOutputStream fileOut;

try {

fileOut = new FileOutputStream("workbook.xls");

wb.write(fileOut);

fileOut.close();

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

//结束

System.out.println("Over");

}

}

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