本文主要描述,Springboot-mybatis框架下上传excel,并将之导入mysql数据库的过程,如果用户id已存在,则进行更新修改数据库中该项信息,由于用到的是前后端分离技术,这里记录的主要是后端java部分,通过与前端接口进行对接实现功能,使用layui等前端框架与之对接,也可以自己写前端代码,本文以Controller开始,从导入过程开始讲述,其中包括字典表的转换

1.在pom.xml文件中导入注解,主要利用POI

<dependency>
  <groupId>org.apache.poi</groupId>
  <artifactId>poi-ooxml</artifactId>
  <version>3.9</version>
</dependency>
<dependency>
  <groupId>commons-fileupload</groupId>
  <artifactId>commons-fileupload</artifactId>
  <version>1.3.1</version>
</dependency>
<dependency>
  <groupId>commons-io</groupId>
  <artifactId>commons-io</artifactId>
  <version>2.4</version>
</dependency> 

2.Controller接口

@PostMapping("/save")
public String addUser(@RequestParam("file") MultipartFile file) {
 String fileName = file.getOriginalFilename();
 try {
  return sysService.batchImport(fileName, file);
 } catch (MyException e) {
  e.printStackTrace();
  return e.getMessage();
 }catch(Exception e){
  e.printStackTrace();
  return "文件异常,导入失败";

 }
} 

3.服务层接口

boolean import(String fileName, MultipartFile file) throws Exception; 

4.业务层实现类

@Transactional(readOnly = false,rollbackFor = Exception.class)
@Override
public boolean import(String fileName, MultipartFile file) throws Exception {
 Map<String, Integer> departmentMap = findDepartment();
 Map<String, Integer> roleMap = findRole();
 boolean notNull = false;
  List<User> userList = new ArrayList<User>();
 if (!fileName.matches("^.+\\.(?i)(xls)$") && !fileName.matches("^.+\\.(?i)(xlsx)$")) {
   throw new MyException("上传文件格式不正确");
 }
 boolean isExcel2003 = true;
 if (fileName.matches("^.+\\.(?i)(xlsx)$")) {
  isExcel2003 = false;
 }
 InputStream is = file.getInputStream();
  Workbook wb = null;
  if (isExcel2003) {
   wb = new HSSFWorkbook(is);
  } else {
   wb = new XSSFWorkbook(is);
  }
  Sheet sheet = wb.getSheetAt(0);
  if(sheet!=null){
   notNull = true;
  }
 User user;
 for (int r = 1; r <= sheet.getLastRowNum(); r++) {
  Row row = sheet.getRow(r);
  if (row == null){
   continue;
  }
  user = new User();
  if( row.getCell(0).getCellType() !=1){
   throw new MyException("导入失败(第"+(r+1)+"行,ID单元格格式请设为文本格式)");
  }
  String id = row.getCell(0).getStringCellValue();
  if(id==null || id.isEmpty()){
    throw new MyException("导入失败(第"+(r+1)+"行,ID未填写)");
  }
  String name = row.getCell(1).getStringCellValue();
  if(name==null || name.isEmpty()){
    throw new MyException("导入失败(第"+(r+1)+"行,姓名未填写)");
  }
  String department = row.getCell(2).getStringCellValue();
  if(departmentMap.get(department)==null){
    throw new MyException("导入失败(第"+(r+1)+"行,不存在此单位或单位未填写)");
  }
  String role = row.getCell(3).getStringCellValue();
  if(roleMap.get(role)==null){
   throw new MyException("导入失败(第"+(r+1)+"行,不存在此角色或角色未填写)");
  }
  Date date;
  if(row.getCell(4).getCellType() !=0){
   throw new MyException("导入失败(第"+(r+1)+"行,入职日期格式不正确或未填写)");
   }else{
     date = row.getCell(4).getDateCellValue();
   }
   user.setId(id);
   user.setName(name);
   user.setDepartmentId((int) departmentMap.get(department));
   user.setRoleId((int) roleMap.get(role));
   user.setDate(date);
   userList.add(user);
  }
 for (User user : userList) {
  String id = user.getId();
  int cnt = userMapper.selectById(id);
  if (cnt == 0) {
   userMapper.addUser(user);
  } else {
   userMapper.updateUserById(user);
  }
 }
 return notNull;
} 

总结

以上所述是小编给大家介绍的Springboot上传excel并将表格数据导入或更新mySql数据库,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持!

02-03 02:16
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