SpringBoot + JPA（Hibernate）环境快速搭建

1、导入相关Jar包

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </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>
        </dependency>
</dependencies>

2、编写application.properties配置文件

#通用数据源配置
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://118.31.170.247:3306/test?charset=utf8mb4&useSSL=false
spring.datasource.username=root
spring.datasource.password=
# Hikari 数据源专用配置
spring.datasource.hikari.maximum-pool-size=20
spring.datasource.hikari.minimum-idle=5
# JPA 相关配置
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update

3、编写实体类

DaySeason.java

@Table(name = "day_season")
@Entity
public class DaySeason implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id ;

    @NotNull
    @Column(name = "uuid", nullable = false)
    private String uuid;

 
    @OneToMany(mappedBy = "daySeason")
    private List<DaySeasonMember> daySeasonMember ;
}

DaySeasonMember.java

@Table(name = "day_season_member")
@Entity
public class DaySeasonMember implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id ;

    @NotNull
    @Column(name = "uuid", nullable = false)
    private String uuid;

    @ManyToOne(targetEntity = DaySeason.class)
    @JoinColumn(name="day_season_id",referencedColumnName ="id")
    private DaySeason daySeason;
}

4、编写接口

DaySeasonDao.java

@Repository
public interface DaySeasonDao extends JpaRepository<DaySeason,Long> {
}

DaySeasonMemberDao.java

@Repository
public interface DaySeasonMemberDao extends JpaRepository<DaySeasonMember,Long> {
}

5、测试

	@Autowired
    private DaySeasonMemberDao daySeasonMemberDao ;

    @Autowired
    private DaySeasonDao daySeasonDao ;

	@Test
    public void test1() throws IOException, JRException {
        List<DaySeasonMember> all = daySeasonMemberDao.findAll();
        List<DaySeason> all1 = daySeasonDao.findAll();
        all.forEach((daySeasonMember)->{
            System.out.println(daySeasonMember);
        });
    }