1.创建spring boot项目，导入持久层操作相关依赖

            <dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>2.1.1</version>
		</dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

2.配置application.properties

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/shiyan5?useUnicode=true&characterEncoding=utf-8&useSSL=true&zeroDateTimeBehavior=convertToNull&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=123456

3.编写测试类

@SpringBootTest
class Experiment5ApplicationTests {

	@Autowired
	DataSource dataSource;
	
	@Test
	void contextLoads() throws Exception{
		System.out.println("获取的数据库连接为:"+dataSource.getConnection());
	}

}

运行结果：