EasyExcel 实现单元格数据下拉选

EasyExcel 实现单元格数据下拉选

前言

easyExcel导出模板的时候，固定的某个列我们有固定的是选项值的时候，我们需要将excel的单元格做成下拉选的情况；满足实际的业务需求。

实现

1.表格下拉选封装类

public class CustomSheetWriteHandler implements SheetWriteHandler {



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

    }

    @Override
    public void afterSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) {
        //定义一个map key是需要添加下拉框的列的index value是下拉框数据
        Map mapDropDown = new HashMap<>(3);
        //设置单位身份 值写死
        String[] unitIdentity = {"职教集团成员单位","拟合作单位","合作单位"};

        //地区
        String[] area = {"国内","国外"};

        //等级下拉选
        String[] level = {"国家级示范校","国家级骨干校","省级示范校","省级骨干校","其他"};

        //年份下拉选
        String[] joinYear = {"1990年","1991年","1992年","1993年","1994年","1995年","1996年","1997年","1998年",
                "1999年","2000年","2001年","2002年","2003年","2004年","2005年","2006年","2007年","2008年","2009年","2010年","2011年","2012年",
                "2013年","2014年","2015年","2016年","2017年","2018年","2019年","2020年","2021年","2022年"};

        //下拉选在Excel中对应的列
        mapDropDown.put(0,unitIdentity);
        mapDropDown.put(1,joinYear);
        mapDropDown.put(4,area);
        mapDropDown.put(10,level);

        //获取工作簿
        Sheet sheet = writeSheetHolder.getSheet();
        ///开始设置下拉框
        DataValidationHelper helper = sheet.getDataValidationHelper();
        //设置下拉框
        for (Map.Entry entry : mapDropDown.entrySet()) {
            /*起始行、终止行、起始列、终止列  起始行为1即表示表头不设置**/
            CellRangeAddressList addressList = new CellRangeAddressList(1, 65535, entry.getKey(), entry.getKey());
            /*设置下拉框数据**/
            DataValidationConstraint constraint = helper.createExplicitListConstraint(entry.getValue());
            DataValidation dataValidation = helper.createValidation(constraint, addressList);
            sheet.addValidationData(dataValidation);
        }
    }
}

2.表格表头类

@Data
@ContentRowHeight(25)
@HeadRowHeight(25)
@ColumnWidth(50)
public class UnitExcelDownVoOne {

    @ExcelIgnore
    private Integer unitType;

    @ExcelProperty(value = "单位身份", index = 0)
    private String unitIdentity;

    @ExcelProperty(value = "加入年份", index = 1)
    private String joinYears;
    @ExcelIgnore
    private Integer joinYear;

    @ExcelProperty(value = "您想加入，成为集团成员吗？", index = 2)
    private String joinIdea;

    @ExcelProperty(value = "单位名称", index = 3)
    private String unitName;

    @ExcelProperty(value = "地区", index = 4)
    private String area;

    @ExcelProperty(value = "地区-省", index = 5)
    private String province;

    @ExcelProperty(value = "地区-市", index = 6)
    private String city;

    @ExcelProperty(value = "地区-县区", index = 7)
    private String county;

    @ExcelProperty(value = "统一社会信用代码", index = 8)
    private String code;

    @ExcelProperty(value = "学校标识码", index = 9)
    private String schoolCode;

    @ExcelProperty(value = "级别", index = 10)
    private String level;

    @ExcelProperty(value = "单位代表人姓名", index = 11)
    private String contact;

    @ExcelProperty(value = "单位代表人联系电话", index = 12)
    private String phone;

    @ExcelProperty(value = "单位代表人职务", index = 13)
    private String representPost;

    @ExcelProperty(value = "单位联系人姓名", index = 14)
    private String companyContactName;

    @ExcelProperty(value = "单位联系人电话", index = 15)
    private String companyContactPhone;

    @ExcelProperty(value = "单位联系人职务", index = 16)
    private String companyContactPost;

    @ExcelProperty(value = "单位联系人部门", index = 17)
    private String workUnit;
}

3. 导出方法

String fileName = URLEncoder.encode("XXX模板导出", "UTF-8");
                response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
                EasyExcel.write(response.getOutputStream(), UnitExcelDownVoOne.class).sheet("中职院校").registerWriteHandler(new CustomSheetWriteHandler()).doWrite(null);

最后结果