SXSSFWorkbook写下拉框
时间: 2023-08-17 21:55:05 浏览: 51
要使用SXSSFWorkbook类来创建一个Excel文件,并在单元格中添加下拉框,可以按照以下步骤进行操作:
1. 导入相关的类:
```java
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFDataValidation;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFDataValidationHelper;
```
2. 创建一个SXSSFWorkbook对象:
```java
SXSSFWorkbook workbook = new SXSSFWorkbook();
```
3. 创建一个工作表:
```java
XSSFSheet sheet = workbook.createSheet("Sheet1");
```
4. 创建一个数据验证器和下拉列表:
```java
XSSFDataValidationHelper dvHelper = new XSSFDataValidationHelper(sheet);
XSSFDataValidationConstraint dvConstraint = (XSSFDataValidationConstraint) dvHelper.createExplicitListConstraint(new String[]{"Option 1", "Option 2", "Option 3"});
```
5. 设置数据验证规则:
```java
int firstRow = 0;
int lastRow = 10;
int firstCol = 0;
int lastCol = 0;
CellRangeAddressList addressList = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol);
XSSFDataValidation validation = (XSSFDataValidation) dvHelper.createValidation(dvConstraint, addressList);
validation.setShowErrorBox(true);
sheet.addValidationData(validation);
```
6. 将工作簿写入文件或输出流:
```java
FileOutputStream fileOut = new FileOutputStream("output.xlsx");
workbook.write(fileOut);
fileOut.close();
```
以上代码将在第一列的前11行创建一个下拉列表,选项为"Option 1"、"Option 2"和"Option 3"。可以根据需要自定义选项列表和位置。记得在使用完毕后关闭工作簿和文件输出流。