poi的DataValidationConstraint类如何设置多选下拉框
时间: 2024-02-27 14:57:18 浏览: 354
在Apache POI中,设置多选下拉框需要使用org.apache.poi.ss.usermodel.DataValidationHelper和org.apache.poi.ss.usermodel.DataValidationConstraint类。下面是一个简单的示例代码:
```java
// 创建Workbook和Sheet对象
Workbook wb = new XSSFWorkbook();
Sheet sheet = wb.createSheet("Sheet1");
// 创建选项列表
String[] options = new String[] {"选项1", "选项2", "选项3", "选项4"};
// 创建DataValidationHelper和DataValidationConstraint对象
DataValidationHelper dvHelper = sheet.getDataValidationHelper();
DataValidationConstraint dvConstraint = dvHelper.createExplicitListConstraint(options);
// 设置多选
dvConstraint.setExplicitListValues(options);
dvConstraint.setOperator(OperatorType.BETWEEN);
// 创建CellRangeAddressList对象并应用DataValidation
CellRangeAddressList addressList = new CellRangeAddressList(0, 0, 0, 0);
DataValidation validation = dvHelper.createValidation(dvConstraint, addressList);
sheet.addValidationData(validation);
```
在上面的代码中,我们首先创建了一个选项列表,然后创建了DataValidationHelper和DataValidationConstraint对象。接下来,我们使用setExplicitListValues方法设置选项列表,并将Operator属性设置为BETWEEN以启用多选。最后,我们创建了CellRangeAddressList对象,并将DataValidation应用于单元格A1。
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