easypoi 省市縣三級聯動
阿新 • • 發佈:2020-12-23
easypoi 省市縣三級聯動
package com.beyondsoft.rdc.cloud.bpo; import java.io.FileOutputStream; import java.util.HashMap; import java.util.Map; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.DataValidation; import org.apache.poi.ss.usermodel.DataValidationConstraint; import org.apache.poi.ss.usermodel.Name; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.util.CellRangeAddressList; import org.apache.poi.util.IOUtils; import org.apache.poi.xssf.usermodel.XSSFDataValidation; import org.apache.poi.xssf.usermodel.XSSFDataValidationConstraint; import org.apache.poi.xssf.usermodel.XSSFDataValidationHelper; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; public class Test { public static void main(String[] args) { Cascade(); } public static void Cascade() { // 建立一個excel @SuppressWarnings("resource") Workbook book = new XSSFWorkbook(); // 建立需要使用者填寫的sheet XSSFSheet sheetPro = (XSSFSheet) book.createSheet("省市縣"); Row row0 = sheetPro.createRow(0); row0.createCell(0).setCellValue("省"); row0.createCell(1).setCellValue("市"); row0.createCell(2).setCellValue("區"); //得到第一級省名稱,放在列表裡 String[] provinceArr = {"江蘇省","安徽省"}; //依次列出各省的市、各市的縣 String[] cityJiangSu = {"南京市","蘇州市","鹽城市"}; String[] cityAnHui = {"合肥市","安慶市"}; String[] countyNanjing = {"六合縣","江寧縣"}; String[] countySuzhou = {"姑蘇區","園區"}; String[] countyYancheng = {"響水縣","射陽縣"}; String[] countyLiuhe = {"瑤海區","廬陽區"}; String[] countyAnQing = {"迎江區","大觀區"}; //將有子區域的父區域放到一個數組中 String[] areaFatherNameArr ={"江蘇省","安徽省","南京市","蘇州市","鹽城市","合肥市","安慶市"}; Map<String,String[]> areaMap = new HashMap<String, String[]>(); areaMap.put("江蘇省", cityJiangSu); areaMap.put("安徽省",cityAnHui); areaMap.put("南京市",countyNanjing); areaMap.put("蘇州市", countySuzhou); areaMap.put("鹽城市",countyYancheng); areaMap.put("合肥市",countyYancheng); areaMap.put("合肥市", countyLiuhe); areaMap.put("安慶市",countyAnQing); //建立一個專門用來存放地區資訊的隱藏sheet頁 //因此也不能在現實頁之前建立,否則無法隱藏。 Sheet hideSheet = book.createSheet("area"); //這一行作用是將此sheet隱藏,功能未完成時註釋此行,可以檢視隱藏sheet中資訊是否正確 //book.setSheetHidden(book.getSheetIndex(hideSheet), true); int rowId = 0; // 設定第一行,存省的資訊 Row provinceRow = hideSheet.createRow(rowId++); for(int i = 0; i < provinceArr.length; i ++){ Cell provinceCell = provinceRow.createCell(i); provinceCell.setCellValue(provinceArr[i]); } // 將具體的資料寫入到每一行中,行開頭為父級區域,後面是子區域。 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]); } // 新增名稱管理器 String range = getRange(1, rowId, son.length); Name name = book.createName(); //key不可重複 name.setNameName(key); String formula = "area!" + range; name.setRefersToFormula(formula); } XSSFDataValidationHelper dvHelper = new XSSFDataValidationHelper(sheetPro); // 省規則 DataValidationConstraint provConstraint = dvHelper.createExplicitListConstraint(provinceArr); // 四個引數分別是:起始行、終止行、起始列、終止列 CellRangeAddressList provRangeAddressList = new CellRangeAddressList(1, 65535, 0, 0); DataValidation provinceDataValidation = dvHelper.createValidation(provConstraint, provRangeAddressList); //驗證 provinceDataValidation.createErrorBox("error", "請選擇正確的省份"); provinceDataValidation.setShowErrorBox(true); provinceDataValidation.setSuppressDropDownArrow(true); sheetPro.addValidationData(provinceDataValidation); //對前20行設定有效性 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.xlsx"); book.write(os); } catch (Exception e) { e.printStackTrace(); } finally { IOUtils.closeQuietly(os); } } /** * 設定有效性 * @param offset 主影響單元格所在列,即此單元格由哪個單元格影響聯動 * @param sheet * @param rowNum 行數 * @param colNum 列數 */ public static void setDataValidation(String offset,XSSFSheet sheet, int rowNum,int colNum) { XSSFDataValidationHelper dvHelper = new XSSFDataValidationHelper(sheet); DataValidation data_validation_list; data_validation_list = getDataValidationByFormula( "INDIRECT($" + offset + (rowNum) + ")", rowNum, colNum,dvHelper); sheet.addValidationData(data_validation_list); } /** * 載入下拉列表內容 * @param formulaString * @param naturalRowIndex * @param naturalColumnIndex * @param dvHelper * @return */ private static DataValidation getDataValidationByFormula( String formulaString, int naturalRowIndex, int naturalColumnIndex,XSSFDataValidationHelper dvHelper) { // 載入下拉列表內容 // 舉例:若formulaString = "INDIRECT($A$2)" 表示規則資料會從名稱管理器中獲取key與單元格 A2 值相同的資料, //如果A2是江蘇省,那麼此處就是江蘇省下的市資訊。 XSSFDataValidationConstraint dvConstraint = (XSSFDataValidationConstraint) dvHelper.createFormulaListConstraint(formulaString); // 設定資料有效性載入在哪個單元格上。 // 四個引數分別是:起始行、終止行、起始列、終止列 int firstRow = naturalRowIndex -1; int lastRow = naturalRowIndex - 1; int firstCol = naturalColumnIndex - 1; int lastCol = naturalColumnIndex - 1; CellRangeAddressList regions = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol); // 資料有效性物件 // 繫結 XSSFDataValidation data_validation_list = (XSSFDataValidation) dvHelper.createValidation(dvConstraint, regions); data_validation_list.setEmptyCellAllowed(false); if (data_validation_list instanceof XSSFDataValidation) { data_validation_list.setSuppressDropDownArrow(true); data_validation_list.setShowErrorBox(true); } else { data_validation_list.setSuppressDropDownArrow(false); } // 設定輸入資訊提示資訊 data_validation_list.createPromptBox("下拉選擇提示", "請使用下拉方式選擇合適的值!"); // 設定輸入錯誤提示資訊 //data_validation_list.createErrorBox("選擇錯誤提示", "你輸入的值未在備選列表中,請下拉選擇合適的值!"); return data_validation_list; } /** * 計算formula * @param offset 偏移量,如果給0,表示從A列開始,1,就是從B列 * @param rowId 第幾行 * @param colCount 一共多少列 * @return 如果給入參 1,1,10. 表示從B1-K1。最終返回 $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 + "$" + rowId; } else { char endPrefix = 'A'; char endSuffix = 'A'; if ((colCount - 25) / 26 == 0 || colCount == 51) {// 26-51之間,包括邊界(僅兩次字母表計算) if ((colCount - 25) % 26 == 0) {// 邊界值 endSuffix = (char)('A' + 25); } else { endSuffix = (char)('A' + (colCount - 25) % 26 - 1); } } else {// 51以上 if ((colCount - 25) % 26 == 0) { endSuffix = (char)('A' + 25); endPrefix = (char)(endPrefix + (colCount - 25) / 26 - 1); } else { endSuffix = (char)('A' + (colCount - 25) % 26 - 1); endPrefix = (char)(endPrefix + (colCount - 25) / 26); } } return "$" + start + "$" + rowId + ":$" + endPrefix + endSuffix + "$" + rowId; } } }