下载模板在生成excel时，sheet1某单元格设置下拉框，动态获取sheet2生成的动态数据
@RequestMapping("/downloadFile")
@ResponseBody
public void download(String fileName, HttpServletResponse response, HttpServletRequest request) {
try {
if (!FileUtils.isValidFilename(fileName)) {
throw new Exception(StringUtils.format(“文件名称({})非法，不允许下载。 “, fileName));
}
String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf(”_”) + 1);
String filePath = RuoYiConfig.getDownloadPath() + fileName;
String path = ResourceUtils.getURL(“classpath:”).getPath()+"/download/" + fileName;
String url="jdbc:mysql://111.204.160.119:3306/smartcampus_test?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8&allowMultiQueries=true";
String username="jyd_dev";
String password="dev123456";
//创建模板
Workbook wb = new HSSFWorkbook();
Sheet sheet = wb.createSheet("导入模板");
//文本格式
HSSFCellStyle cellStyle = (HSSFCellStyle) wb.createCellStyle();
HSSFDataFormat format1 = (HSSFDataFormat) wb.createDataFormat();
cellStyle.setDataFormat(format1.getFormat("@"));
//第一行
Row row = sheet.createRow(0);
CellStyle style = CatalogExcelUtil.getHeadStyle(wb);
CatalogExcelUtil.initCell(row.createCell(0), style, "一卡通号");
CatalogExcelUtil.initCell(row.createCell(1), style, "姓名");
CatalogExcelUtil.initCell(row.createCell(2), style, "证件号");
// CatalogExcelUtil.initCell(row.createCell(1), style, "=VLOOKUP(C2,dept!A:B,2,FALSE)");
CatalogExcelUtil.initCell(row.createCell(3), style, "性别");
CatalogExcelUtil.initCell(row.createCell(4), style, "手机号");
CatalogExcelUtil.initCell(row.createCell(5), style, "职务");
CatalogExcelUtil.initCell(row.createCell(6), style, "部门");
//行高
row.setHeight((short)400);
// 字体 字号 字体颜色
HSSFFont f = (HSSFFont)wb.createFont();
f.setFontHeightInPoints((short) 12);
f.setFontName("宋体");
f.setColor(IndexedColors.WHITE.getIndex());
//获取单元格
Cell cell0=row.getCell(0);
Cell cell1=row.getCell(1);
Cell cell2=row.getCell(2);
Cell cell3=row.getCell(3);
Cell cell4=row.getCell(4);
Cell cell5=row.getCell(5);
Cell cell6=row.getCell(6);
cell0.getCellStyle().setFont(f);
cell1.getCellStyle().setFont(f);
cell2.getCellStyle().setFont(f);
cell3.getCellStyle().setFont(f);
cell4.getCellStyle().setFont(f);
cell5.getCellStyle().setFont(f);
cell6.getCellStyle().setFont(f);
sheet.setDefaultColumnWidth((short)15);
//获取部门id和部门名称
List list = deptService.selectDeptId();
//list转数组
String[] strings = new String[list.size()];
String[] array = new String[list.size()];
//list.toArray(strings);
for (int i = 0; i < list.size(); i++) {
//部门id
strings[i]=String.valueOf(list.get(i).getDeptId());
//部门名称
array[i]=list.get(i).getDeptName();
}
// 第3列的第1行到第301行单元格部门下拉 ，可替换为从数据库的部门表数据，
// dept 为隐藏的sheet的别名，1为这个sheet的索引 ，考虑到有多个列绑定下拉列表
wb= dropDownList2003(wb, sheet, strings, 1, 300, 6, 6, "dept", 1);
//设置某列 下标 单元格格式为"文本"
sheet.setDefaultColumnStyle(0, cellStyle);
sheet.setDefaultColumnStyle(4, cellStyle);
// 生成sheet3
Sheet sheet3 =wb.createSheet("部门信息参照表");
sheet3.setDefaultColumnWidth((short)25);
//获取数据库连接
Class.forName("com.mysql.cj.jdbc.Driver");
// 连接数据库
Connection con = (Connection) DriverManager.getConnection(url, username, password);
Statement st = (Statement) con.createStatement();
//执行查询 sql语句，进行查询数据
String sql = "Select d.dept_id,d.dept_name From sys_dept d";
ResultSet rs = st.executeQuery(sql);
// 设置表头信息（写入Excel左上角是从(0,0)开始的）
Row row3 = sheet3.createRow(0);
ResultSetMetaData rsmd = rs.getMetaData();
int colnum = rsmd.getColumnCount();
for (int i = 1; i <= colnum; i++) {
// String name = rsmd.getColumnName(i);
String name=null;
// 单元格
Cell cel3 = row3.createCell(i - 1);
// 写入数据
if(i等于等于1){
name=“部门ID”;
}else if(i==2){
name=“部门名称”;
}
cel3.setCellValue(name);
}
// 设置表格信息
int idx = 1;
while (rs.next()) {
Row row1 = sheet3.createRow(idx++);
for (int i = 1; i <= colnum; i++) {
String str = rs.getString(i);
// 单元格
Cell cell = row1.createCell(i - 1);
// 写入数据
cell.setCellValue(str);
}
}
// 保存
con.close();
wb.write(new FileOutputStream(path));
response.setCharacterEncoding("utf-8");
response.setContentType("multipart/form-data");
response.setHeader("Content-Disposition",
"attachment;fileName=" + FileUtils.setFileDownloadHeader(request, realFileName));
FileUtils.writeBytes(path, response.getOutputStream());
} catch (Exception e) {
//log.error("下载文件失败", e);
}
}
/**
* @param wb HSSFWorkbook对象
* @param realSheet 需要操作的sheet对象
* @param datas 下拉的列表数据
* @param startRow 开始行
* @param endRow 结束行
* @param startCol 开始列
* @param endCol 结束列
* @param hiddenSheetName 隐藏的sheet名
* @param hiddenSheetIndex 隐藏的sheet索引
* @return
* @throws Exception
*/
public static HSSFWorkbook dropDownList2003(Workbook wb, Sheet realSheet, String[] datas, int startRow, int endRow,
int startCol, int endCol, String hiddenSheetName, int hiddenSheetIndex)
throws Exception {
HSSFWorkbook workbook = (HSSFWorkbook) wb;
// 创建一个数据源sheet
HSSFSheet hidden = workbook.createSheet(hiddenSheetName);
// 数据源sheet页不显示
workbook.setSheetHidden(hiddenSheetIndex, true);
// 将下拉列表的数据放在数据源sheet上
HSSFRow row = null;
HSSFCell cell = null;
for (int i = 0, length = datas.length; i < length; i++) {
row = hidden.createRow(i);
cell = row.createCell(0);
cell.setCellValue(datas[i]);
}
//2016-12-15更新，遇到问题：生成的excel下拉框还是可以手动编辑，不满足
//HSSFName namedCell = workbook.createName();
//namedCell.setNameName(hiddenSheetName);
// A1 到 Adatas.length 表示第一列的第一行到datas.length行，需要与前一步生成的隐藏的数据源sheet数据位置对应
//namedCell.setRefersToFormula(hiddenSheetName + "!$A$1:$A" + datas.length);
// 指定下拉数据时，给定目标数据范围 hiddenSheetName!$A$1:$A5 隐藏sheet的A1到A5格的数据
DVConstraint constraint = DVConstraint.createFormulaListConstraint(hiddenSheetName + "!$A$1:$A" + datas.length);
CellRangeAddressList addressList = null;
HSSFDataValidation validation = null;
row = null;
cell = null;
// 单元格样式
CellStyle style = workbook.createCellStyle();
style.setDataFormat(HSSFDataFormat.getBuiltinFormat("0"));
//style.setAlignment(CellStyle.ALIGN_CENTER);
//style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
// 循环指定单元格下拉数据
for (int i = startRow; i <= endRow; i++) {
row = (HSSFRow) realSheet.createRow(i);
cell = row.createCell(startCol);
cell.setCellStyle(style);
addressList = new CellRangeAddressList(i, i, startCol, endCol);
validation = new HSSFDataValidation(addressList, constraint);
realSheet.addValidationData(validation);
}
return workbook;
}
public class CatalogExcelUtil {
/**
* 创建Workbook
*
* @param in
* @return
* @throws Exception
*/
public static Workbook createWorkBook(InputStream in) throws Exception {
try {
return new HSSFWorkbook(in);
} finally {
if (in != null) {
in.close();
}
}
}
/**
* 获取单单元格字符串值
*
* @param cell
* @return
*/
public static String getCellStringValue(Cell cell) {
if (cell == null) {
return "";
}
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
RichTextString str = cell.getRichStringCellValue();
return str.getString();
}
/**
* 初始化Excel单元格, 设置单元格值和样式
*
* @param cell
* @param style
* @param value
*/
public static void initCell(Cell cell, CellStyle style, String value) {
cell.setCellStyle(style);
cell.setCellValue(value);
}
/**
* 初始化Excel单元格, 设置单元格值、样式和备注
*
* @param cell
* @param style
* @param value
* @param comment
*/
public static void initCell(Cell cell, CellStyle style, String value, Comment comment) {
cell.setCellStyle(style);
cell.setCellValue(value);
cell.setCellComment(comment);
}
/**
* 获取Excel单元格备注
*
* @param drawing
* @param anchor
* @param content
* @return
*/
public static Comment getCellComment(Drawing drawing, HSSFClientAnchor anchor, String content) {
Comment comment = drawing.createCellComment(anchor);
comment.setString(new HSSFRichTextString(content));
return comment;
}
/**
* 获取Excel标题单元格样式
*
* @param wb
* @return
*/
public static CellStyle getHeadStyle(Workbook wb) {
CellStyle style = wb.createCellStyle();
//设置单元格背景颜色
HSSFCellStyle style1 =(HSSFCellStyle) wb.createCellStyle();
//设置前景色
style1.setFillForegroundColor(IndexedColors.GREY_40_PERCENT.getIndex());
style1.setFillPattern(FillPatternType.SOLID_FOREGROUND);
style1.setLocked(true);
return style1;
}
/**
* 获取Excel数据单元格样式
*
* @param wb
* @return
*/
public static CellStyle getBodyStyle(Workbook wb) {
CellStyle style = wb.createCellStyle();
// style.setBorderTop(HSSFCellStyle.BORDER_THIN);
// style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
// style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
return style;
}
/**
* 获取Excel错误单元格样式
*
* @param wb
* @return
*/
public static CellStyle getErrorStyle(Workbook wb) {
CellStyle style = wb.createCellStyle();
Font font = wb.createFont();
font.setColor(HSSFColor.RED.index);
style.setFont(font);
return style;
}
}
效果图如下：
