利用SpringBoot和poi实现excel的导入与导出

导入依赖

        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.17</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.17</version>
        </dependency>

导出

代码段：

 void poitest1() throws IOException {
        //创建工作簿 类似于创建Excel文件
        XSSFWorkbook workbook = new XSSFWorkbook();
        //创建 sheetname页名
        XSSFSheet sheet = workbook.createSheet("员工信息");
        sheet.setColumnWidth(3, 20 * 256);//给第3列设置为20个字的宽度
        sheet.setColumnWidth(4, 20 * 256);//给第4列设置为20个字的宽度
        //创建一行,下标从0开始
        XSSFRow row = sheet.createRow(0);
        //创建这行中的列,下标从0开始 （表头）
        XSSFCell cell = row.createCell(0);
        // 给cell 0下表赋值
        cell.setCellValue("姓名");
        //创建这行中的列,并给该列直接赋值
        row.createCell(1).setCellValue("年龄");
        row.createCell(2).setCellValue("性别");
        row.createCell(3).setCellValue("生日");
        row.createCell(4).setCellValue("手机号");
        // 设置表里内容
        row = sheet.createRow(1);
        row.createCell(0).setCellValue("man");
        row.createCell(1).setCellValue("保密");
        row.createCell(2).setCellValue("男");
        row.createCell(3).setCellValue("保密");
        row.createCell(4).setCellValue("12121212121");

        row = sheet.createRow(2);
        row.createCell(0).setCellValue("woman");
        row.createCell(1).setCellValue("18");
        row.createCell(2).setCellValue("女");
        row.createCell(3).setCellValue("2000-01-01");
        row.createCell(4).setCellValue("12121212122");
        //设定 路径
//        Date currenttime=form
//        String folder=
        File file = new File("C:\\Users\\lyl\\Desktop\\员工信息.xlsx");
        FileOutputStream stream = new FileOutputStream(file);
        // 需要抛异常
        workbook.write(stream);
        //关流
        stream.close();
    }

执行结果：

导入

代码段：

void poitest2() throws IOException {
        File file = new File("C:\\Users\\lyl\\Desktop\\员工信息.xlsx");
        //获得该文件的输入流
        FileInputStream stream = new FileInputStream(file);
        // 多态  抛异常
        Workbook sheets = new XSSFWorkbook(stream);
        //获取一个工作表(sheet页)，下标从0开始
        Sheet sheet = sheets.getSheetAt(0);
        for (int i = 1; i <= sheet.getLastRowNum(); i++) {

            // 获取行数
            Row row = sheet.getRow(i);
            // 获取单元格 取值
            String value1 = row.getCell(0).getStringCellValue();
            String value2 = row.getCell(1).getStringCellValue();
            String value3 = row.getCell(2).getStringCellValue();
            String value4 = row.getCell(3).getStringCellValue();
            String value5 = row.getCell(4).getStringCellValue();

            System.out.println(value1);
            System.out.println(value2);
            System.out.println(value3);
            System.out.println(value4);
            System.out.println(value5);
        }


        //关流
        sheets.close();
        stream.close();
    }

执行结果：