SpringBoot中使用 POI的示例代码

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>RELEASE</version>
</dependency>
<!--POI-->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>5.2.2</version>
</dependency>

1.创建workbook工作簿
Workbook wb = new XSSFWorkbook();
2.创建表单Sheet
Sheet sheet = wb.createSheet("test");
3.文件流
FileOutputStream fos = new FileOutputStream("E:\\test.xlsx");
4.写入文件
wb.write(fos);
5.关闭
fos.close();

 public static void main(String[] args) throws IOException {
//        1.创建workbook工作簿
     Workbook wb = new XSSFWorkbook();
//        2.创建表单Sheet
     Sheet sheet = wb.createSheet("test的sheet");
//        3.创建行对象，从0开始
     Row row = sheet.createRow(0);
//        4.创建单元格，从0开始
     Cell cell = row.createCell(0);
//        5.单元格写入数据
     cell.setCellValue("以往有人这样说过：“不要因为一件事的终止而感到悲伤，因为终点就是起点，它将为你开拓一个更广阔的世界。”……123");
//        6.XSSFCellStyle设置单元格样式
     CellStyle cellStyle = wb.createCellStyle();
     cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
     // 设置背景颜色
     cellStyle.setFillForegroundColor((short)3);
     cell.setCellStyle(cellStyle);
     Sheet sheet2 = wb.getSheet("test的sheet");
     Row row2 = sheet2.getRow(0);
     Cell cell2 = row2.getCell(0);
     String stringCellValue = cell2.getStringCellValue();
     System.out.println(stringCellValue);
//        7.文件流
     FileOutputStream fos = new FileOutputStream("E:\\test.xlsx");
//        8.写入文件
     wb.write(fos);
//        9.关闭
     wb.close();
     fos.close();
}

CellStyle cellStyle = wb.createCellStyle();

cellStyle.setAlignment(HorizontalAlignment.CENTER);

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

Font font = workbook.createFont();
font.setColor(Font.COLOR_RED);		//红色
cellStyle.setFont(font);

//firstRow第一行
//lastRow最后一行
//firstCol第一列
//lastCol最后一列
CellRangeAddress cellRangeAddress = new CellRangeAddress(2, 2, 0, 11);
sheet.addMergedRegion(cellRangeAddress);//合并单元格

//边框样式
//合并的单元格
//创建的表单Sheet
RegionUtil.setBorderTop(BorderStyle.THIN, cellRangeAddress, sheet);
RegionUtil.setBorderRight(BorderStyle.THIN, cellRangeAddress, sheet);
RegionUtil.setBorderBottom(BorderStyle.THIN, cellRangeAddress, sheet);
RegionUtil.setBorderLeft(BorderStyle.THIN, cellRangeAddress, sheet);

//列号
sheet.autoSizeColumn(1);