（1）、添加相关依赖

 1        
 2             org.springframework.boot
 3             spring-boot-starter-jdbc
 4         
 5 
 6         
 7             mysql
 8             mysql-connector-java
 9             8.0.14
10         

（2）、在配置文件中配置数据源相关信息

1 spring.datasource.username=root
2 spring.datasource.password=123456
3 spring.datasource.url=jdbc:mysql://localhost:3306/JdbcDemo?serverTimezone=UTC
4 spring.datasource.driver-class-name=com.mysql.jdbc.Driver

（3）、编写service、dao（为了方便我就写在一起了）

 1 package cn.coreqi.service;
 2 
 3 import cn.coreqi.entities.User;
 4 import org.springframework.beans.factory.annotation.Autowired;
 5 import org.springframework.jdbc.core.BeanPropertyRowMapper;
 6 import org.springframework.jdbc.core.JdbcOperations;
 7 import org.springframework.jdbc.core.RowMapper;
 8 import org.springframework.stereotype.Service;
 9 
10 import java.util.ArrayList;
11 import java.util.List;
12 
13 @Service
14 public class UserService {
15     @Autowired
16     private JdbcOperations jdbcOperations;
17     public void addUser(User user){
18         jdbcOperations.update("insert into users(UserName,PassWord,Enabled) values (?,?,?)"
19         ,user.getUserName(),user.getPassWord(),user.getEnabled());
20     }
21     public void addUserList(List users){
22         List datas = new ArrayList<>();
23         for (User s : users){
24             datas.add(new Object[]{s.getUserName(),s.getPassWord(),s.getEnabled()});
25         }
26         jdbcOperations.batchUpdate("insert into users(UserName,PassWord,Enabled) values (?,?,?)"
27         ,datas);
28     }
29     public User getUserById(Integer id){
30         RowMapper rowMapper = new BeanPropertyRowMapper<>(User.class);
31         return jdbcOperations.queryForObject("select * from users where Id = ?",rowMapper,id);
32     }
33     public List getUsers(){
34         RowMapper rowMapper = new BeanPropertyRowMapper<>(User.class);
35         return jdbcOperations.query("select * from users",rowMapper);
36     }
37     public Long getUsersSize(){
38         return jdbcOperations.queryForObject("select count(Id) from users",Long.class);
39     }
40 }

（4）controller调用即可