SpringBoot整合Jdbc

（1）、添加相关依赖

       <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.14</version>
        </dependency>

（2）、在配置文件中配置数据源相关信息

spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.url=jdbc:mysql://localhost:3306/JdbcDemo?serverTimezone=UTC
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）

package cn.coreqi.service;

import cn.coreqi.entities.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcOperations;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

@Service
public class UserService {
    @Autowired
    private JdbcOperations jdbcOperations;
    public void addUser(User user){
        jdbcOperations.update("insert into users(UserName,PassWord,Enabled) values (?,?,?)"
        ,user.getUserName(),user.getPassWord(),user.getEnabled());
    }
    public void addUserList(List<User> users){
        List<Object[]> datas = new ArrayList<>();
        for (User s : users){
            datas.add(new Object[]{s.getUserName(),s.getPassWord(),s.getEnabled()});
        }
        jdbcOperations.batchUpdate("insert into users(UserName,PassWord,Enabled) values (?,?,?)"
        ,datas);
    }
    public User getUserById(Integer id){
        RowMapper<User> rowMapper = new BeanPropertyRowMapper<>(User.class);
        return jdbcOperations.queryForObject("select * from users where Id = ?",rowMapper,id);
    }
    public List<User> getUsers(){
        RowMapper<User> rowMapper = new BeanPropertyRowMapper<>(User.class);
        return jdbcOperations.query("select * from users",rowMapper);
    }
    public Long getUsersSize(){
        return jdbcOperations.queryForObject("select count(Id) from users",Long.class);
    }
}

（4）controller调用即可