Java链接数据库动态生成Excel并做数据二级联动

本文介绍了一个使用Java结合POI库动态生成Excel,并实现数据二级联动的需求。通过链接数据库获取数据,详细步骤包括拼接Excel主体、逐个赋值下拉框、计算公示、建立下拉框关联以及设置单元格格式。

需求描述:项目中需用到一个模板下载,并且需要链接数据库读取数据做到级联动,过程坎坷,记录分享一下
实现方法:Java + POI + 转成流返回

拼接Excel主体
public Workbook spliceWorkbook() {
   
   
        // 创建一个excel
        @SuppressWarnings("resource")
        Workbook workbook = new XSSFWorkbook();
        // 创建需要用户填写的sheet
        XSSFSheet sheet = (XSSFSheet) workbook.createSheet("物流导入");
        //设置列宽
        sheet.setDefaultColumnWidth((int) ExportExcelCellConstants.DATE_CELL_WIDTH);
        Row row0 = sheet.createRow(0);
        row0.createCell(0).setCellValue("物流名称");
        row0.createCell(1).setCellValue("物流编码");
        List<LogisticsCompany> logisticsCompanies = logisticsCompanyDao.findByStatus(true);
        if (logisticsCompanies == null || logisticsCompanies.size() == 0) {
   
   
            return workbook;
        }
        //设置单元格格式
        row0.getCell(0).setCellStyle(createCellStyle((XSSFWorkbook) workbook));
        row0.getCell(1).setCellStyle(createCellStyle((XSSFWorkbook) workbook));
        //得到物流公司名称
        List<String> logisticsNameList = logisticsCompanies.stream().map(LogisticsCompany::getLogisticsCompanyName).collect(Collectors.toList());
        String[] logisticsName = new String[logisticsNameList.size()];
        logisticsNameList.toArray(logisticsName);
        Map<String, List<String>> map = new HashMap<>();
        //组装物流公司名称,物流编码
        logisticsCompanies.stream().map(logisticsCompany -> {
   
   
Excel 三级 联动 下拉框 宏代码 实例 代码注释 先在第一个下拉框加入一个valiation, 内容是 =$A$2:$A$5 Private Sub Worksheet_Change(ByVal Target As Range) ' Call back function which defined within according worksheet Dim i As Integer Dim tempStr As String Dim firstDrawBoxRowCount As Integer Dim firstDrawBoxColumn As Integer firstDrawBoxRowCount = 4 'Define the row number of first draw box firstDrawBoxColumn = 1 'Define the column number of ifrst draw box Dim secondDrawBoxRowCount As Integer Dim secondDrawBoxColumn As Integer secondDrawBoxRowCount = 33 'Define the row number of second draw box secondDrawBoxColumn = 4 'Define the column number of second draw box If Target.Column = 1 Then 'This defines the first column of draw box list, you can also define the row number of draw box list Cells(Target.Row, Target.Column + 1) = "" ' Do the clean first Cells(Target.Row, Target.Column + 1).Validation.Delete Cells(Target.Row, Target.Column + 2) = "" Cells(Target.Row, Target.Column + 2).Validation.Delete For i = 2 To firstDrawBoxRowCount + 1 'Enter the cycle to find out the content for column 2 If Trim(Cells(Target.Row, Target.Column)) = Trim(Cells(i, firstDrawBoxColumn)) Then tempStr = Trim(Cells(i, firstDrawBoxColumn + 1)) 'Find out the options for second draw box, it is seperated by , Cells(Target.Row, Target.Column + 1).Select ' Fill the validation to second draw box With Selection.Validation .Delete .Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, Operator:= _ xlBetween, Formula1:=tempStr .IgnoreBlank = True .InCellDropdown = True .InputTitle = "" .ErrorTitle = "" .InputMessage = "" .ErrorMessage = "" .IMEMode = xlIMEModeNoControl .ShowInput = True .ShowError = True
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值