2003版本 easypoi 三级联动

2007版本 easypoi 省市县三级联动

import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.Map;

import org.apache.poi.hssf.usermodel.HSSFDataValidation;
import org.apache.poi.hssf.usermodel.HSSFDataValidationHelper;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.util.IOUtils;

public class Test {

    public static void main(String[] args) {
        Cascade();
    }

    public static void Cascade() {
        // 创建一个excel
        @SuppressWarnings("resource")
        Workbook book = new HSSFWorkbook();

        // 创建需要用户填写的sheet
        HSSFSheet sheetPro = (HSSFSheet)book.createSheet("省市县");
        Row row0 = sheetPro.createRow(0);
        row0.createCell(0).setCellValue("省");
        row0.createCell(1).setCellValue("市");
        row0.createCell(2).setCellValue("区");

        // 得到第一级省名称，放在列表里
        String[] provinceArr = {"江苏省", "安徽省"};

        // 依次列出各省的市、各市的县
        String[] cityJiangSu = {"南京市", "苏州市", "盐城市"};
        String[] cityAnHui = {"合肥市", "安庆市"};
        String[] countyNanjing = {"六合县", "江宁县"};
        String[] countySuzhou = {"姑苏区", "园区"};
        String[] countyYancheng = {"响水县", "射阳县"};
        String[] countyLiuhe = {"瑶海区", "庐阳区"};
        String[] countyAnQing = {"迎江区", "大观区"};
        // 将有子区域的父区域放到一个数组中
        String[] areaFatherNameArr = {"江苏省", "安徽省", "南京市", "苏州市", "盐城市", "合肥市", "安庆市"};
        Map<String, String[]> areaMap = new HashMap<String, String[]>();
        areaMap.put("江苏省", cityJiangSu);
        areaMap.put("安徽省", cityAnHui);
        areaMap.put("南京市", countyNanjing);
        areaMap.put("苏州市", countySuzhou);
        areaMap.put("盐城市", countyYancheng);
        areaMap.put("合肥市", countyYancheng);
        areaMap.put("合肥市", countyLiuhe);
        areaMap.put("安庆市", countyAnQing);

        // 创建一个专门用来存放地区信息的隐藏sheet页
        // 因此也不能在现实页之前创建，否则无法隐藏。
        Sheet hideSheet = book.createSheet("area");
        // 这一行作用是将此sheet隐藏，功能未完成时注释此行,可以查看隐藏sheet中信息是否正确
        book.setSheetHidden(book.getSheetIndex(hideSheet), true);

        int rowId = 0;
        // 设置第一行，存省的信息
        Row provinceRow = hideSheet.createRow(rowId++);
        for (int i = 0; i < provinceArr.length; i++) {
            Cell provinceCell = provinceRow.createCell(i );
            provinceCell.setCellValue(provinceArr[i]);
        }

        // 将具体的数据写入到每一行中，行开头为父级区域，后面是子区域。
        for (int i = 0; i < areaFatherNameArr.length; i++) {
            String key = areaFatherNameArr[i];
            String[] son = areaMap.get(key);
            Row row = hideSheet.createRow(rowId++);
            row.createCell(0).setCellValue(key);
            for (int j = 0; j < son.length; j++) {
                Cell cell = row.createCell(j + 1);
                cell.setCellValue(son[j]);
            }

            // 添加名称管理器
            String range1 = getRange(1, rowId, son.length);
            Name name = book.createName();
            // key不可重复
            name.setNameName(key);
            String formula = "area!" + range1;
            name.setRefersToFormula(formula);
        }

        HSSFDataValidationHelper dvHelper = new HSSFDataValidationHelper(sheetPro);
        DataValidationConstraint dvConstraint = dvHelper.createExplicitListConstraint(provinceArr);
        CellRangeAddressList addressList = new CellRangeAddressList(1, 20, 0, 0);
        // 添加菜单(将单元格与"名称"建立关联)
        HSSFDataValidation validation = (HSSFDataValidation)dvHelper.createValidation(dvConstraint, addressList);
        validation.setShowErrorBox(false);
        sheetPro.addValidationData(validation);

        // 对前20行设置有效性
        for (int i = 2; i < 20; i++) {
            setDataValidation("A", sheetPro, i, 2);
            setDataValidation("B", sheetPro, i, 3);
        }
        FileOutputStream os = null;
        try {
            os = new FileOutputStream("D:/test.xls");
            book.write(os);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeQuietly(os);
        }
    }

    /**
     * 设置有效性
     *
     * @param offset 主影响单元格所在列，即此单元格由哪个单元格影响联动
     * @param sheet
     * @param rowNum 行数
     * @param colNum 列数
     */
    public static void setDataValidation(String offset, HSSFSheet sheet, int rowNum, int colNum) {
        HSSFDataValidationHelper dvHelper = new HSSFDataValidationHelper(sheet);
        CellRangeAddressList regions = new CellRangeAddressList(rowNum - 1, rowNum - 1, colNum - 1, colNum - 1);
        DataValidationConstraint dvConstraint = dvHelper.createFormulaListConstraint("INDIRECT($" + offset +"$"+ rowNum + ")");
        HSSFDataValidation dataValidation = (HSSFDataValidation)dvHelper.createValidation(dvConstraint, regions);
        sheet.addValidationData(dataValidation);
    }
    /**
     * 计算formula
     *
     * @param offset 偏移量，如果给0，表示从A列开始，1，就是从B列
     * @param rowId 第几行
     * @param colCount 一共多少列
     * @return 如果给入参 1,1,10. 表示从B1-K1。最终返回 $B$1:$K$1
     *
     */
    public static String getRange(int offset, int rowId, int colCount) {
        char start = (char)('A' + offset);
        if (colCount <= 25) {
            char end = (char)(start + colCount - 1);
            return "$" + start + "$" + rowId + ":$" + end + "$" + rowId;
        } else {
            char endPrefix = 'A';
            char endSuffix = 'A';
            if ((colCount - 25) / 26 == 0 || colCount == 51) {// 26-51之间，包括边界（仅两次字母表计算）
                if ((colCount - 25) % 26 == 0) {// 边界值
                    endSuffix = (char)('A' + 25);
                } else {
                    endSuffix = (char)('A' + (colCount - 25) % 26 - 1);
                }
            } else {// 51以上
                if ((colCount - 25) % 26 == 0) {
                    endSuffix = (char)('A' + 25);
                    endPrefix = (char)(endPrefix + (colCount - 25) / 26 - 1);
                } else {
                    endSuffix = (char)('A' + (colCount - 25) % 26 - 1);
                    endPrefix = (char)(endPrefix + (colCount - 25) / 26);
                }
            }
            return "$" + start + "$" + rowId + ":$" + endPrefix + endSuffix + "$" + rowId;
        }
    }
    
    /**
     * excel下标转字符
     *
     * @param number
     * @return
     */
    public static String numberToLetter(int number) {
        if (number <= 25) {
            char start = (char)('A' + number);
            return start + "";
        }
        char prefix = 'A';
        char suffix;
        if ((number - 25) % 26 == 0) {
            prefix = (char)(prefix + (number - 25) / 26 - 1);
            suffix = (char)('A' + 25);
        } else {
            prefix = (char)(prefix + (number - 25) / 26);
            suffix = (char)('A' + (number - 25) % 26 - 1);
        }
        return prefix + "" + suffix;
    }
}