Springboot上传excel并将表格数据导入或更新mySql数据库的过程

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