poi导出excel工具

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/Liutt55/article/details/79030489

/**
 * 创建表格
 * @param dataMap   数据
 * @return
 */
public XSSFWorkbook createExcelCheck(Map<String, List<List<String>>> dataMap, boolean range){
    XSSFWorkbook excel = new XSSFWorkbook();
    for (String key: dataMap.keySet()) {
        List<List<String>> sheetList = dataMap.get(key);
        XSSFSheet sheet = excel.createSheet(key);   //多个sheet/切换

        if (range) createCellRange(sheet,sheetList);   //如果true，设置合并对应单元格

        XSSFRow row0 = sheet.createRow(0);
        List<String> headList = sheetList.get(0);
        for (int j = 0; j < headList.size(); j++) { //表头设置
            sheet.setColumnWidth(j,20*256);
            String cellString = headList.get(j);
            XSSFCell cell = row0.createCell(j);
            XSSFCellStyle cellStyle = getStyle(excel,(short)12);
            cell.setCellStyle(cellStyle);
            cell.setCellValue(cellString);
        }
        for (int i = 1; i < sheetList.size(); i++) {
            List<String> rowList = sheetList.get(i);
            XSSFRow row = sheet.createRow(i);
            XSSFCellStyle cellStyle = getStyle(excel,(short)10);
            int rowSize = rowList.size();
            for (int j = 0; j < rowSize; j++) {  //表主体数据设置
                if(j == (rowSize-1)) {
                    if(StrKit.notBlank(rowList.get(j))) { // 将图片写入excel
                        try {

                            FileOutputStream fileOut = null;
                            BufferedImage bufferImg = null;
                            ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
                            bufferImg = ImageIO.read(new File("D:/talos"+rowList.get(j)));
                            ImageIO.write(bufferImg, "jpg", byteArrayOut);
                            //画图的顶级管理器，一个sheet只能获取一个（一定要注意这点）
                            XSSFDrawing patriarch = sheet.createDrawingPatriarch();
                            //anchor主要用于设置图片的属性
                            XSSFClientAnchor anchor = new XSSFClientAnchor(0, 0, 255, 255,(short) j, i, (short) j+1, i+1);
                            anchor.setAnchorType(3);
                            patriarch.createPicture(anchor, excel.addPicture(byteArrayOut.toByteArray(), XSSFWorkbook.PICTURE_TYPE_JPEG));
                        } catch(Exception e) {
                            e.printStackTrace();
                            continue;
                        }
                    }
                    continue;
                }
                String cellString = rowList.get(j);
                XSSFCell cell = row.createCell(j);
                cell.setCellStyle(cellStyle);
                cell.setCellValue(cellString);
            }
        }
    }
    return excel;
}

/**
 * 创建表格
 * @param dataMap   数据
 * @return
 */
public XSSFWorkbook createExcel(Map<String, List<List<String>>> dataMap, boolean range){
    XSSFWorkbook excel = new XSSFWorkbook();
    for (String key: dataMap.keySet()) {
        List<List<String>> sheetList = dataMap.get(key);
        XSSFSheet sheet = excel.createSheet(key);   //多个sheet/切换

        if (range) createCellRange(sheet,sheetList);   //如果true，设置合并对应单元格

        XSSFRow row0 = sheet.createRow(0);
        List<String> headList = sheetList.get(0);
        for (int j = 0; j < headList.size(); j++) { //表头设置
            sheet.setColumnWidth(j,20*256);
            String cellString = headList.get(j);
            XSSFCell cell = row0.createCell(j);
            XSSFCellStyle cellStyle = getStyle(excel,(short)12);
            cell.setCellStyle(cellStyle);
            cell.setCellValue(cellString);
        }
        for (int i = 1; i < sheetList.size(); i++) {
            List<String> rowList = sheetList.get(i);
            XSSFRow row = sheet.createRow(i);
            XSSFCellStyle cellStyle = getStyle(excel,(short)10);
            for (int j = 0; j < rowList.size(); j++) {  //表主体数据设置
                String cellString = rowList.get(j);
                XSSFCell cell = row.createCell(j);
                cell.setCellStyle(cellStyle);
                cell.setCellValue(cellString);
            }
        }
    }
    return excel;
}