EasyExcel下拉选择框

效果展示：

代码

import com.alibaba.excel.write.handler.SheetWriteHandler;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.metadata.holder.WriteWorkbookHolder;
import org.apache.poi.ss.usermodel.DataValidation;
import org.apache.poi.ss.usermodel.DataValidationConstraint;
import org.apache.poi.ss.usermodel.DataValidationHelper;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddressList;

import java.util.Map;

public class TitleHandler implements SheetWriteHandler {

    /**
     * 下拉框值
     */
    private Map<Integer,String[]> dropDownMap;

    /**
     * 多少行有下拉
     */
    private final static Integer rowSize = 200;

    public TitleHandler(Map<Integer,String[]> dropDownMap) {
        this.dropDownMap = dropDownMap;
    }

    @Override
    public void beforeSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) {

    }

    @Override
    public void afterSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) {
        Sheet sheet = writeSheetHolder.getSheet();
        DataValidationHelper helper = sheet.getDataValidationHelper();

        dropDownMap.forEach((celIndex, strings) -> {
            // 区间设置
            CellRangeAddressList cellRangeAddressList = new CellRangeAddressList(1, rowSize, celIndex, celIndex);
            // 下拉内容
            DataValidationConstraint constraint = helper.createExplicitListConstraint(strings);
            DataValidation dataValidation = helper.createValidation(constraint, cellRangeAddressList);
            sheet.addValidationData(dataValidation);
        });
    }
}

//response输出文件流
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf-8");
response.setHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(exportFileName, "UTF-8"));
String selectMenu[] = new String[]{"申通", "顺丰速运", "易达通", "程光", "天天", "汇通快递", "平安快递", "富腾达"};
//写入
TitleHandler titleHandler = new TitleHandler(new HashMap<Integer, String[]>(){{ put(14, selectMenu); }})
EasyExcel.write(response.getOutputStream()).registerWriteHandler(titleHandler).head(entity).sheet("Sheet1").doWrite(list);