@PostMapping(“/imp”)
public String imp(@RequestPart(“filePath”) MultipartFile filePath) {
//创建一个excel文件
HSSFWorkbook workbook = null;
try {
workbook = new HSSFWorkbook(filePath.getInputStream()); //获取文件
Sheet sheet = workbook.getSheetAt(0); //获取第一个工作表
//循环工作表的数据
//getLastRowNum() 获取行
for (int i = 0; i < sheet.getLastRowNum(); i++) {
Row row = sheet.getRow(i + 1); //下表是从0开始的所以 把行数设置为第二行从第二行开始读
Cell cell = row.getCell(0); //获取第一个单元格,以此类推
Cell cel2 = row.getCell(1);
Cell cel3 = row.getCell(2);
Cell cel4 = row.getCell(3);
Cell cel5 = row.getCell(4);
//获取值
int id = (int) cell.getNumericCellValue();
String name = cel2.toString();
String sex = cel3.toString();
String education = cel4.toString();
int monthly = (int) cel5.getNumericCellValue();
//把值放到对象
Staff staff = new Staff(id, name, sex, education, monthly);
//调用mapper进行添加
int count = staffMapper.insert(staff);
if (count > 0) {
System.out.println(“上传成功”);
}
}
} catch (IOException e) {
e.printStackTrace();
}
return “redirect:/emp”;
}
数据导出到本地:
//把数据导出到Excel中
@GetMapping(“/exc”)
public String derive(Model model, HttpSession session) {
// 第一步,创建一个webbook,对应一个Excel文件
HSSFWorkbook wb = new HSSFWorkbook();
// 第二步,在webbook中添加一页,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet(“员工表一”);
// 第三步,在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
HSSFRow row = sheet.createRow((int) 0); //0代表第一行
// 第四步,创建单元格,并设置值表头 设置表头居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
HSSFCell cell = row.createCell((short) 0);
cell.setCellValue(“员工编号”);
cell.setCellStyle(style);
cell = row.createCell((short) 1);
cell.setCellValue(“姓名”);
cell.setCellStyle(style);
cell = row.createCell((short) 2);
cell.setCellValue(“性别”);
cell.setCellStyle(style);
cell = row.createCell((short) 3);
cell.setCellValue(“学历”);
cell.setCellStyle(style);
cell = row.createCell((short) 4);
cell.setCellValue(“月薪”);
cell.setCellStyle(style);
// 第五步,写入实体数据 实际应用中这些数据从数据库得到,
List list = staffMapper.selectAll();
for (int i = 0; i < list.size(); i++) {
row = sheet.createRow((int) i + 1);
// 第四步,创建单元格,并设置值
row.createCell((short) 0).setCellValue(list.get(i).getId());
row.createCell((short) 1).setCellValue(list.get(i).getName());
row.createCell((short) 2).setCellValue(list.get(i).getSex());
row.createCell((short) 3).setCellValue(list.get(i).getEducation());
row.createCell((short) 4).setCellValue(list.get(i).getMonthly());
}
// 第六步,将文件存到指定位置
try {
FileOutputStream fout = new FileOutputStream(“E:\aaa.xls”);
wb.write(fout);
fout.close();
} catch (Exception e) {
e.printStackTrace();
}
session.setAttribute(“add”,“数据导出成功”);
return “redirect:/emp”;