使用poi将数据导出到excel

1.依赖

		<dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.17</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.17</version>
        </dependency>

2.后端代码

 @GetMapping("/writeExcel")
    public Result writeExcel() throws IOException {
        List<Borrow> list = borrowService.list(null);
        for (Borrow thisBorrow : list) {
            thisBorrow.setBook(bookService.getById(thisBorrow.getBid()));
            thisBorrow.setUser(userService.getById(thisBorrow.getUid()));
        }
        String fileName  = "C:\\Users\\26913\\Desktop\\报表"+new Date().getTime()+".xls";
        //创建一个簿
        Workbook workbook=new HSSFWorkbook();
        //创建一张表
        Sheet sheet = workbook.createSheet("报表");
        Row head = sheet.createRow(0);
        Cell cell = head.createCell(0);

        cell.setCellValue("序号");
        cell = head.createCell(1);
        cell.setCellValue("借阅人编号");
        cell = head.createCell(2);
        cell.setCellValue("借阅人姓名");
        cell = head.createCell(3);
        cell.setCellValue("借阅人电话");
        cell = head.createCell(4);
        cell.setCellValue("借阅人性别");
        cell = head.createCell(5);
        cell.setCellValue("图书编号");
        cell = head.createCell(6);
        cell.setCellValue("图书名称");
        cell = head.createCell(7);
        cell.setCellValue("借阅时间");
        cell = head.createCell(8);
        cell.setCellValue("归还时间");

        for (int i = 0; i < list.size(); i++) {
            Row row = sheet.createRow(i+1);
            row.createCell(0).setCellValue(i+1);
            row.createCell(1).setCellValue(list.get(i).getUid());
            row.createCell(2).setCellValue(list.get(i).getUser().getName());
            row.createCell(3).setCellValue(list.get(i).getUser().getPhone());
            row.createCell(4).setCellValue(list.get(i).getUser().getSex());
            row.createCell(5).setCellValue(list.get(i).getBid());
            row.createCell(6).setCellValue(list.get(i).getBook().getName());
            row.createCell(7).setCellValue(list.get(i).getBorrowTime());
            row.createCell(8).setCellValue(list.get(i).getStillTime());
        }
        FileOutputStream outputStream = new FileOutputStream(fileName);
        workbook.write(outputStream);
        //关闭流
        outputStream.close();
        return Result.ok().message("导出成功");
    }

3.效果展示