spring配置mysql

<dependencies>
    <!-- Spring JDBC -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.3.10</version>
    </dependency>
    <!-- MySQL Connector -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.25</version>
    </dependency>
</dependencies>

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

import javax.sql.DataSource;

@Configuration
public class DataSourceConfig {

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/mydb?useSSL=false&serverTimezone=UTC");
        dataSource.setUsername("root");
        dataSource.setPassword("password");
        return dataSource;
    }
}

import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;

public class Main {

    public static void main(String[] args) {
        ApplicationContext context = new AnnotationConfigApplicationContext(DataSourceConfig.class);
        JdbcTemplate jdbcTemplate = context.getBean(JdbcTemplate.class);

        String sql = "SELECT * FROM users";
        jdbcTemplate.query(sql, (rs, rowNum) -> {
            System.out.println(rs.getString("username"));
            return null;
        });
    }
}