如何在Java中利用POI生成一个带联动下拉框的excel表格

本篇文章为大家展示了如何在Java中利用POI生成一个带联动下拉框的excel表格，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

具体代码如下所示：

import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import org.apache.poi.hssf.usermodel.DVConstraint;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFCellStyle;import org.apache.poi.hssf.usermodel.HSSFDataFORMat;import org.apache.poi.hssf.usermodel.HSSFDataValidation;import org.apache.poi.hssf.usermodel.HSSFFont;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.hssf.util.HSSFColor;import org.apache.poi.ss.usermodel.DataValidation;import org.apache.poi.ss.usermodel.Name;import org.apache.poi.ss.util.CellRangeAddressList;public class ExcelLinkage { // 样式 private HSSFCellStyle cellStyle; // 初始化省份数据 private List<String> province = new ArrayList<String>(Arrays.asList("湖南",   "广东")); // 初始化数据（湖南的市区） private List<String> hnCity = new ArrayList<String>(Arrays.asList("长沙市",   "邵阳市")); // 初始化数据（广东市区） private List<String> gdCity = new ArrayList<String>(Arrays.asList("深圳市",   "广州市")); public void setDataCellStyles(HSSFWorkbook workbook, HSSFSheet sheet) {  cellStyle = workbook.createCellStyle();  // 设置边框  cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);  cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);  cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);  cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);  // 设置背景色  cellStyle.setFillForegroundColor(HSSFColor.LIGHT_GREEN.index);  cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  // 设置居中  cellStyle.setAlignment(HSSFCellStyle.ALIGN_LEFT);  // 设置字体  HSSFFont font = workbook.createFont();  font.setFontName("宋体");  font.setFontHeightInPoints((short) 11); // 设置字体大小  cellStyle.setFont(font);// 选择需要用到的字体格式  // 设置单元格格式为文本格式（这里还可以设置成其他格式,可以自行百度）  HSSFDataFormat format = workbook.createDataFormat();  cellStyle.setDataFormat(format.getFormat("@")); }  private void creatHideSheet(HSSFWorkbook workbook, String hideSheetName) {  // 创建数据域  HSSFSheet sheet = workbook.createSheet(hideSheetName);  // 用于记录行  int rowRecord = 0;  // 获取行（从0下标开始）  HSSFRow provinceRow = sheet.createRow(rowRecord);  // 创建省份数据  this.creatRow(provinceRow, province);  // 根据省份插入对应的市信息  rowRecord++;  for (int i = 0; i < province.size(); i++) {   List<String> list = new ArrayList<String>();   // 我这里是写死的 ， 实际中应该从数据库直接获取更好   if (province.get(i).toString().equals("湖南")) {    // 将省份名称放在插入市的第一列， 这个在后面的名称管理中需要用到    list.add(0, province.get(i).toString());    list.addAll(hnCity);   } else {    list.add(0, province.get(i).toString());    list.addAll(gdCity);   }   //获取行   HSSFRow Cityrow = sheet.createRow(rowRecord);   // 创建省份数据   this.creatRow(Cityrow, list);   rowRecord++;  } }  public void creatRow(HSSFRow currentRow, List<String> text) {  if (text != null) {   int i = 0;   for (String cellValue : text) {    // 注意列是从（1）下标开始    HSSFCell userNameLableCell = currentRow.createCell(i++);    userNameLableCell.setCellValue(cellValue);   }  } }  private void creatExcelNameList(HSSFWorkbook workbook, String hideSheetName) {  Name name;  name = workbook.createName();  // 设置省名称  name.setNameName("province");  name.setRefersToFormula(hideSheetName + "!$A$1:$"    + this.getcellColumnFlag(province.size())+ "$1");  // 设置省下面的市  for (int i = 0; i < province.size(); i++) {   List<String> num = new ArrayList<String>();    if (province.get(i).toString().equals("湖南")) {    name = workbook.createName();    num.add(0,province.get(i).toString());    num.addAll(hnCity);    name.setNameName(province.get(i).toString());    name.setRefersToFormula(hideSheetName + "!$B$" + (i + 2) + ":$"       + this.getcellColumnFlag(num.size()) + "$" + (i + 2));   } else {    name = workbook.createName();    num.add(0,province.get(i).toString());    num.addAll(gdCity);    name.setNameName(province.get(i).toString());    name.setRefersToFormula(hideSheetName + "!$B$" + (i + 2) + ":$"       + this.getcellColumnFlag(num.size()) + "$" + (i + 2));   }  } } // 根据数据值确定单元格位置（比如：28-AB） private String getcellColumnFlag(int num) {  String columFiled = "";  int chuNum = 0;  int yuNum = 0;  if (num >= 1 && num <= 26) {   columFiled = this.doHandle(num);  } else {   chuNum = num / 26;   yuNum = num % 26;   columFiled += this.doHandle(chuNum);   columFiled += this.doHandle(yuNum);  }  return columFiled; } private String doHandle(final int num) {  String[] charArr = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J",    "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V",    "W", "X", "Y", "Z" };  return charArr[num - 1].toString(); }  public DataValidation getDataValidationByFormula(String formulaString,   int naturalRowIndex, int naturalColumnIndex) {  // 加载下拉列表内容  DVConstraint constraint = DVConstraint    .createFormulaListConstraint(formulaString);  // 设置数据有效性加载在哪个单元格上。  // 四个参数分别是：起始行、终止行、起始列、终止列  int firstRow = naturalRowIndex;  int lastRow = naturalRowIndex;  int firstCol = naturalColumnIndex - 1;  int lastCol = naturalColumnIndex - 1;  CellRangeAddressList regions = new CellRangeAddressList(firstRow,    lastRow, firstCol, lastCol);  // 数据有效性对象  DataValidation data_validation_list = new HSSFDataValidation(regions,    constraint);  return data_validation_list; }  public void creatAppRow(HSSFSheet hssfSheet, int naturalRowIndex) {  // 获取行  HSSFRow hssfRow = hssfSheet.createRow(naturalRowIndex);  HSSFCell province = hssfRow.createCell(0);  province.setCellValue("");  province.setCellStyle(cellStyle);  HSSFCell City = hssfRow.createCell(1);  City.setCellValue("");  City.setCellStyle(cellStyle);  // 得到验证对象  DataValidation data_validation_list1 = this.getDataValidationByFormula(    "province", naturalRowIndex, 1);  DataValidation data_validation_list2 = this    .getDataValidationByFormula("INDIRECT($A"      + (naturalRowIndex + 1) + ")", naturalRowIndex, 2);  // 工作表添加验证数据  hssfSheet.addValidationData(data_validation_list1);  hssfSheet.addValidationData(data_validation_list2); } public void Export() {  try {   File file = new File("F:/excel.xls");   FileOutputStream outputStream = new FileOutputStream(file);   // 创建excel   HSSFWorkbook workbook = new HSSFWorkbook();   // 设置sheet 名称   HSSFSheet excelSheet = workbook.createSheet("excel");   // 设置样式   this.setDataCellStyles(workbook, excelSheet);   // 创建一个隐藏页和隐藏数据集   this.creatHideSheet(workbook, "shutDataSource");   // 设置名称数据集   this.creatExcelNameList(workbook, "shutDataSource");   // 创建一行数据   for (int i = 0; i < 50; i++) {    this.creatAppRow(excelSheet,i);   }   workbook.write(outputStream);   outputStream.close();  } catch (FileNotFoundException e) {   e.printStackTrace();  } catch (IOException e) {   e.printStackTrace();  } } public static void main(String[] args) {  ExcelLinkage linkage = new ExcelLinkage();  linkage.Export(); }}