poi实现联动数据导出模板工具类

poi实现联动数据导出模板工具类

/**
	 * @throws IOException 
	 * @throws UnsupportedEncodingException 
     * @Title: createExcelTemplate 
     * @Description: 生成Excel导入模板  
     * @param @param fileName  Excel文件名称
     * @param @param handers   Excel列标题(数组)
     * @param @param downData  下拉框数据(数组)
     * @param @param downRows  下拉列的序号(数组,序号从0开始)
     * @param areaFatherNameArr  一级数据
     * @param areaFatherNameArrs 所有有子区域的父标题
     * @param areaMap			子区域
     * @param number			联动级数
     * @return void
     * @throws
     */
    public static void createExcelTemplateByGanged(HttpServletResponse response,String fileName, String[] handers, 
            List<String[]> downData, List<Integer> downRows,String text,List<Integer> listred,String[] areaFatherNameArr,String[] areaFatherNameArrs,Map<String, String []> areaMap,int number) throws IOException{
    	XSSFWorkbook wb = new XSSFWorkbook();
    	XSSFSheet sheet = wb.createSheet("Sheet0");
    	XSSFRow head0 = sheet.createRow(0);
    	head0.setHeight((short) 1500);
    	XSSFFont font = (XSSFFont) wb.createFont(); 
    	font.setColor(HSSFColorPredefined.RED.getIndex());
    	font.setBold(true);
        XSSFCellStyle style = wb.createCellStyle();
        style.setFont(font);
        style.setWrapText(true);
    	 for(int i = 0;i < handers.length;i++){
             XSSFCell cell = head0.createCell(i);
             if(i==0) {
            	 cell.setCellStyle(style);
            	 cell.setCellValue(new XSSFRichTextString(text));
             }
         }
    	 Integer num=handers.length-1;
    	 if(num<3) {
    		 num=4;
    	 }
    	sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, num));
    	XSSFCellStyle style2 = wb.createCellStyle();
    	XSSFFont font2 = (XSSFFont) wb.createFont(); 
    	font2.setBold(true);
    	style2.setAlignment(HorizontalAlignment.CENTER);
    	style2.setFillPattern(FillPatternType.SOLID_FOREGROUND);
    	style2.setFillForegroundColor(HSSFColorPredefined.RED.getIndex());
    	style2.setFont(font2);
    	XSSFCellStyle style3 = wb.createCellStyle();
    	style3.setAlignment(HorizontalAlignment.CENTER);
    	style3.setFillPattern(FillPatternType.SOLID_FOREGROUND);
    	style3.setFillForegroundColor(HSSFColorPredefined.LIGHT_GREEN.getIndex());
    	// 设置头标签
    	XSSFRow head = sheet.createRow(1);
        for(int i = 0;i < handers.length;i++){
        	sheet.setColumnWidth(i, 5000);
            XSSFCell cell = head.createCell(i);
            cell.setCellValue(handers[i]);
            if(listred.contains(i)) {
            	cell.setCellStyle(style2);
            }else {
            	cell.setCellStyle(style3);
            }
        }
        
      //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 = wb.createSheet("sheet1");
        //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
        wb.setSheetHidden(wb.getSheetIndex(hideSheet), true);

        int rowId = 0;
        // 设置第一行，存省的信息
        Row provinceRow = hideSheet.createRow(rowId++);
        provinceRow.createCell(0).setCellValue("schoolMap");
        for(int i = 0; i < handers.length; i ++){
            Cell provinceCell = provinceRow.createCell(i + 1);
            provinceCell.setCellValue(handers[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 < areaFatherNameArrs.length;i++){
            String key = areaFatherNameArrs[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 range = getRange(1, rowId, son.length);
            Name name = wb.createName();
            //key不可重复
            name.setNameName(key);
            String formula = "sheet1!" + range;
            name.setRefersToFormula(formula);
        }
        XSSFDataValidationHelper dvHelpers = new XSSFDataValidationHelper((XSSFSheet)sheet);
        // 省规则
        DataValidationConstraint provConstraint = dvHelpers.createExplicitListConstraint(areaFatherNameArr);
        // 四个参数分别是：起始行、终止行、起始列、终止列
        CellRangeAddressList provRangeAddressList = new CellRangeAddressList(2, 20000, 0, 0);
        DataValidation provinceDataValidation = dvHelpers.createValidation(provConstraint, provRangeAddressList);
        //验证
        provinceDataValidation.createErrorBox("error", "请选择正确的数据");
        provinceDataValidation.setShowErrorBox(true);
        provinceDataValidation.setSuppressDropDownArrow(true);
        sheet.addValidationData(provinceDataValidation);
        //对前1000行设置有效性
        for(int i = 2;i < 1000;i++){
        	for(int j=0;j<number;j++) {
        		setDataValidation(((char)(65+j)) ,sheet,i,2 + j);
        	}
        }
        if(downRows!=null&&downRows.size()>0) {
        	for(int i=0;i<downRows.size();i++) {
            	Integer firstcol=downRows.get(i);
            	String[] textList=downData.get(i);
            	XSSFDataValidationHelper dvHelper = new XSSFDataValidationHelper(sheet);
                XSSFDataValidationConstraint dvConstraint = (XSSFDataValidationConstraint)dvHelper.createExplicitListConstraint(textList);
                CellRangeAddressList addressList = null;
                XSSFDataValidation validation = null;

                addressList = new CellRangeAddressList(2,20000,firstcol,firstcol);
                validation = (XSSFDataValidation)dvHelper.createValidation(dvConstraint, addressList);

                validation.setSuppressDropDownArrow(true);
                validation.setShowErrorBox(true);   
                sheet.addValidationData(validation);
            }
        }
        
        String fileNameURL = java.net.URLEncoder.encode(fileName+".xlsx", "UTF-8");
		response.setContentType("application/vnd.ms-excel;charset=utf-8");
		response.setHeader("content-disposition", "attachment;filename="+fileNameURL+";"+"filename*=utf-8''"+fileNameURL);
        response.flushBuffer();
        response.setCharacterEncoding("UTF-8");
        OutputStream outputStream = response.getOutputStream();
        wb.write(response.getOutputStream());
        wb.close();
        outputStream.flush();
        outputStream.close();
    }
    
    /**
     * 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(char 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);
    }

    /**
     * 加载下拉列表内容
     * @param formulaString
     * @param naturalRowIndex
     * @param naturalColumnIndex
     * @param dvHelper
     * @return
     */
    private static  DataValidation getDataValidationByFormula(
            String formulaString, int naturalRowIndex, int naturalColumnIndex,XSSFDataValidationHelper dvHelper) {
        // 加载下拉列表内容
        // 举例：若formulaString = "INDIRECT($A$2)" 表示规则数据会从名称管理器中获取key与单元格 A2 值相同的数据，
        //如果A2是江苏省，那么此处就是江苏省下的市信息。
        XSSFDataValidationConstraint dvConstraint = (XSSFDataValidationConstraint) dvHelper.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 -1;
        int lastRow = naturalRowIndex - 1;
        int firstCol = naturalColumnIndex - 1;
        int lastCol = naturalColumnIndex - 1;
        CellRangeAddressList regions = new CellRangeAddressList(firstRow,
                lastRow, firstCol, lastCol);
        // 数据有效性对象
        // 绑定
        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);
        }
        // 设置输入信息提示信息
        data_validation_list.createPromptBox("下拉选择提示", "请使用下拉方式选择合适的值！");
        // 设置输入错误提示信息
        //data_validation_list.createErrorBox("选择错误提示", "你输入的值未在备选列表中，请下拉选择合适的值！");
        return data_validation_list;
    }

    /**
     *  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;
        }
    }

测试代码

@GetMapping("/test")
	public void test(HttpServletRequest req,HttpServletResponse resp) {

			String fileName="classinfo"+System.currentTimeMillis();
			String[] header={"*学校名称","*校区名称","*年级名称","*班级名称"};
			//普通下拉框
			List<Integer> listi=new ArrayList<Integer>();
			List<String[]> list=new ArrayList<String[]>();
			
			String text="填表说明。";
			//标题加红
 	 		List<Integer> listred=new ArrayList<Integer>();
			listred.add(0);
			listred.add(1);
			listred.add(2);
			listred.add(3);
			//学校名称
			String [] xxmc = {"测试学校1","测试学校2","测试学校3"};
			//校区名称
			String[] xqmc1= {"测试学校1本校","测试学校1分校"};
	        String[] xqmc2= {"测试学校2本校","测试学校2分校"};
	        String[] xqmc3= {"测试学校3本校","测试学校3分校"};
	        //所有有子区域的父标题
	        String [] xxmc1= {"测试学校1","测试学校2","测试学校3","测试学校1本校"};
	        
	        String [] njmc= {"一年级","二年级"};
	        String [] njmc1= {"七年级","八年级"};
	        //联动下拉框数据
	        Map<String, String []> areaMap = new HashMap<String, String[]>();
	        areaMap.put("测试学校1", xqmc1);
	        areaMap.put("测试学校2", xqmc2);
	        areaMap.put("测试学校3", xqmc3);
	        areaMap.put("测试学校1本校", njmc);
	        areaMap.put("测试学校2本校", njmc1);
			try {
				ExcelUtil.createExcelTemplateByGanged(resp, fileName, header, list, listi, text, listred, xxmc,xxmc1, areaMap,2);
			} catch (IOException e) {
				e.printStackTrace();
			}
	
    }

本文地址：https://blog.csdn.net/qq_45857020/article/details/110234893