POI写入xlsx文件

        我们在开发中经常会遇到将信息打印到xlsx文件中的功能，可以使用POI来完成。

        创建Excel文件

HSSFWorkbook workbook = new HSSFWorkbook();

        创建工作表sheet

HSSFSheet sheet = workbook.createSheet();

        创建第一行，标题行

HSSFRow rowFirst = sheet.createRow(0);

        创建第一列

HSSFCell cellFirst = rowFirst.createCell(0);

        设置单元格内容

cellFirst.setCellValue("上传失败文件");

        合并单元格（起始行, 终止行, 起始列, 终止列）

CellRangeAddress cra =new CellRangeAddress(0, 0, 0, 3);

sheet.addMergedRegion(cra);

        设置单元格样式

HSSFCellStyle cellStyle = workbook.createCellStyle();

        设置字体样式

Font fontStyle = workbook.createFont();

        字体加粗

fontStyle.setBold(true);

        设置字体

fontStyle.setFontName("黑体");

        设置字体大小

fontStyle.setFontHeightInPoints((short) 22);

        将字体样式添加到单元格样式中

cellStyle.setFont(fontStyle);

        设置对齐格式为居中

cellStyle.setAlignment(HorizontalAlignment.CENTER.getCode);

        设置边框

cellStyle.setBorderBottom(BorderStyle.THIN);
cellStyle.setBorderLeft(BorderStyle.THIN);
cellStyle.setBorderRight(BorderStyle.THIN);
cellStyle.setBorderTop(BorderStyle.THIN);

        为刚刚的单元格添加样式

cellFirst.setCellStyle(cellStyle);

        第二行，表头行（记得更改字体样式）

HSSFRow row = sheet.createRow(1);

        添加数据

String[] title = {"#","文件路径","文件名称","上传失败原因"};
HSSFCell cell = null;
for (int i = 0;i < title.length;i ++){
    cell = row.createCell(i);
    cell.setCellValue(title[i]);
    cell.setCellStyle(cellStyle);
}

        追加数据

int index = 2;
for (String fileName : errorFileNameMap.keySet()){
    HSSFRow nextrow = sheet.createRow(index);
    HSSFCell cell2 = nextrow.createCell(0);
    cell2.setCellValue(index - 1);
    cell2.setCellStyle(cellStyle);
    cell2=nextrow.createCell(1);
    cell2.setCellValue(errorFileNameMap.get(fileName));
    cell2.setCellStyle(cellStyle);
    cell2 = nextrow.createCell(2);
    cell2.setCellValue(fileName);
    cell2.setCellStyle(cellStyle);
    cell2 = nextrow.createCell(3);
    cell2.setCellValue("文件名称格式不匹配");
    cell2.setCellStyle(cellStyle);
    index ++;
}

        创建文件

File file=new File("C:\\var\\my\\上传失败文件.xlsx");

        写入文件

file.createNewFile();
FileOutputStream stream = org.apache.commons.io.FileUtils.openOutputStream(file);
workbook.write(stream);
stream.close();

示例代码

/**
     * POI写入xlsx文件
     *
     * @param errorFileNameMap <文件名，文件绝对路径>
     * @param dbErrorFileNameMap <文件名，文件绝对路径>
     */
    public static void POIExcelCre(Map<String,String> errorFileNameMap,Map<String,String> dbErrorFileNameMap){
        HSSFWorkbook workbook = new HSSFWorkbook();
        HSSFSheet sheet = workbook.createSheet();
        HSSFRow rowFirst = sheet.createRow(0);
        HSSFCell cellFirst = rowFirst.createCell(0);
        cellFirst.setCellValue("上传失败文件");
        CellRangeAddress cra =new CellRangeAddress(0, 0, 0, 3); 
        sheet.addMergedRegion(cra);

        HSSFCellStyle cellStyle = workbook.createCellStyle(); 
        Font fontStyle = workbook.createFont(); 
        fontStyle.setBold(true); 
        fontStyle.setFontName("黑体"); 
        fontStyle.setFontHeightInPoints((short) 22);
        // 将字体样式添加到单元格样式中
        cellStyle.setFont(fontStyle);
        // 边框，居中
        cellStyle.setAlignment(HorizontalAlignment.CENTER.getCode);
        cellStyle.setBorderBottom(BorderStyle.THIN);
        cellStyle.setBorderLeft(BorderStyle.THIN);
        cellStyle.setBorderRight(BorderStyle.THIN);
        cellStyle.setBorderTop(BorderStyle.THIN);
        cellFirst.setCellStyle(cellStyle);  

        fontStyle.setBold(false);  
        fontStyle.setFontName("宋体");  
        fontStyle.setFontHeightInPoints((short) 12);  
        cellStyle.setFont(fontStyle);


        //第二行，表头行
        HSSFRow row = sheet.createRow(1);
        String[] title = {"#","文件路径","文件名称","上传失败原因"};
        HSSFCell cell = null;
        for (int i = 0;i < title.length;i ++){
            cell = row.createCell(i);
            cell.setCellValue(title[i]);
            cell.setCellStyle(cellStyle);
        }
        
        //追加数据
        int index = 2;
        for (String fileName : errorFileNameMap.keySet()){
            HSSFRow nextrow = sheet.createRow(index);
            HSSFCell cell2 = nextrow.createCell(0);
            cell2.setCellValue(index - 1);
            cell2.setCellStyle(cellStyle);
            cell2=nextrow.createCell(1);
            cell2.setCellValue(errorFileNameMap.get(fileName));
            cell2.setCellStyle(cellStyle);
            cell2 = nextrow.createCell(2);
            cell2.setCellValue(fileName);
            cell2.setCellStyle(cellStyle);
            cell2 = nextrow.createCell(3);
            cell2.setCellValue("文件名称格式不匹配");
            cell2.setCellStyle(cellStyle);
            index ++;
        }
        if (dbErrorFileNameMap != null){
            for (String fileName : dbErrorFileNameMap.keySet()){
                HSSFRow nextrow = sheet.createRow(index);
                HSSFCell cell2 = nextrow.createCell(0);
                cell2.setCellValue(index - 1);
                cell2.setCellStyle(cellStyle);
                cell2=nextrow.createCell(1);
                cell2.setCellValue(dbErrorFileNameMap.get(fileName));
                cell2.setCellStyle(cellStyle);
                cell2 = nextrow.createCell(2);
                cell2.setCellValue(fileName);
                cell2.setCellStyle(cellStyle);
                cell2 = nextrow.createCell(3);
                cell2.setCellValue("订单中心无此合同/报价编号");
                cell2.setCellStyle(cellStyle);
                index ++;
            }
        }
        
        //创建文件
        File file=new File("C:\\var\\genechem\\上传失败文件.xlsx");
        try {
            file.createNewFile();
            FileOutputStream stream = org.apache.commons.io.FileUtils.openOutputStream(file);
            workbook.write(stream);
            stream.close();
        }catch (Exception e){}
    }

标签：xlsx,cellStyle,setCellStyle,cell2,写入,nextrow,createCell,POI,setCellValue
来源： https://blog.csdn.net/weixin_44307338/article/details/122462599