1. 添加Spring Data JPA的起步依赖
<!-- springBoot JPA的起步依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
2. 添加数据库驱动依赖
<!-- MySQL连接驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
3. 配置数据库和jpa的相关属性(application.properties)
# 数据库连接信息
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://172.20.10.13:3306/test?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=11250825
# JPA Configuration:
spring.jpa.database=MySQL
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.ImprovedNamingStrategy
4. 创建实体(domain——User.java)
@Data
@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String username;
private String password;
private String name;
}
5. repository——UserRepository.java
public interface UserRepository extends JpaRepository<User, Long> {
public List<User> findAll();
}
6. 编写测试类
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootJpaApplication.class)
public class JpaTest {
@Autowired
private UserRepository userRepository;
@Test
public void test() {
List<User> all = userRepository.findAll();
System.out.println(all);
}
}
7. 测试即可。
对比上一篇博文,可以发现,使用JPA后,省去了sql语句和mapper。