package com.ruoyi.system.handler;
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import com.alibaba.excel.write.handler.SheetWriteHandler;
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import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
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import com.alibaba.excel.write.metadata.holder.WriteWorkbookHolder;
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import java.util.Map;
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import lombok.Data;
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import org.apache.poi.ss.usermodel.DataValidation;
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import org.apache.poi.ss.usermodel.DataValidationConstraint;
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import org.apache.poi.ss.usermodel.DataValidationHelper;
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import org.apache.poi.ss.usermodel.Sheet;
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import org.apache.poi.ss.util.CellRangeAddressList;
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import org.apache.poi.xssf.usermodel.XSSFDataValidation;
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@Data
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public class SelectedSheetWriteHandler implements SheetWriteHandler {
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private Map<Integer, String[]> selectedMap;
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private int rows;
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public SelectedSheetWriteHandler(Map<Integer, String[]> selectedMap, int rows) {
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this.selectedMap = selectedMap;
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this.rows = rows;
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}
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@Override
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public void afterSheetCreate(WriteWorkbookHolder writeWorkbookHolder,
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WriteSheetHolder writeSheetHolder) {
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//获取sheet页
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Sheet sheet = writeSheetHolder.getSheet();
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int firstRow = writeSheetHolder.getHead().get(0).size() + 1;
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int lastRow = writeSheetHolder.getHead().get(0).size() + rows;
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///开始设置下拉框
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DataValidationHelper helper = sheet.getDataValidationHelper();
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for (Map.Entry<Integer, String[]> entry : selectedMap.entrySet()) {
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/***起始行、终止行、起始列、终止列**/
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CellRangeAddressList addressList = new CellRangeAddressList(firstRow, lastRow,
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entry.getKey(), entry.getKey());
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/***设置下拉框数据**/
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DataValidationConstraint constraint = helper.createExplicitListConstraint(
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entry.getValue());
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DataValidation dataValidation = helper.createValidation(constraint, addressList);
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/***处理Excel兼容性问题**/
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if (dataValidation instanceof XSSFDataValidation) {
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dataValidation.setSuppressDropDownArrow(true);
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dataValidation.setShowErrorBox(true);
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} else {
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dataValidation.setSuppressDropDownArrow(false);
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}
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sheet.addValidationData(dataValidation);
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}
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}
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}
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