hibernate(结合springboot)入门

本文参考   springboot整合hibernate:https://blog.csdn.net/u014745069/article/details/79940540

　　　　　hibernate命名策略: https://www.cnblogs.com/sxdcgaq8080/p/7910474.html

• maven依赖引用

<!--        hibernate核心-->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>6.0.0.Alpha3</version>
            <type>pom</type>
        </dependency>
<!--                mysql  驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.18</version>
        </dependency>

<!--        Springboot 提供的 orm-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>

• application.properties中对hibernate的配置

#hibernate
spring.datasource.url=jdbc:mysql://192.168.3.244:3306/BaseManage?useUnicode=true&characterEncoding=utf-8&noAccessToProcedureBodies=true&allowMultiQueries=true&useAffectedRows=true
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5
# Specify the DBMS
spring.jpa.database = MYSQL
# Show or not log for each sql query  是否显示运行的sql  调试使用
spring.jpa.show-sql = true



# Hibernate ddl auto (create, create-drop, update)
#ddl-auto:create----每次运行该程序，没有表格会新建表格，表内有数据会清空
#ddl-auto:create-drop----每次程序结束的时候会清空表
#ddl-auto:update----每次运行程序，没有表格会新建表格，表内有数据不会清空，只会更新
#ddl-auto:validate----运行程序会校验数据与数据库的字段类型是否相同，不同会报错
spring.jpa.hibernate.ddl-auto =validate

#hibernate4实体映射到数据表时候的命名策略
#使用 spring.jpa.hibernate.naming-strategy属性
#两个可选的配置：
#org.hibernate.cfg.DefaultNamingStrategy    直接映射，不会做过多的处理（前提没有设置@Table，@Column等属性的时候）。如果有@Column则以@Column为准
#org.hibernate.cfg.ImprovedNamingStrategy    表名，字段为小写，当有大写字母的时候会转换为分隔符号“_”。
#hibernate5之后，上面的作废。而是采用下面两个属性：
#spring.jpa.hibernate.naming.implicit-strategy= # Hibernate 5 implicit naming strategy fully qualified name.
#spring.jpa.hibernate.naming.physical-strategy= # Hibernate 5 physical naming strategy fully qualified name.
#spring.jpa.hibernate.naming.implicit-strategy=  这里使用默认

#physical-strategy属性
#org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl 直接映射，不会做过多的处理（前提没有设置@Table，@Column等属性的时候）。如果有@Column则以@Column为准
#org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy 表名，字段为小写，当有大写字母的时候会转换为分隔符号“_”。


#implicit-strategy属性
#org.hibernate.boot.model.naming.ImplicitNamingStrategyJpaCompliantImpl 默认的命名策略，兼容JPA 2.0的规范；
#org.hibernate.boot.model.naming.ImplicitNamingStrategyLegacyHbmImpl 兼容Hibernate老版本中的命名规范；
#org.hibernate.boot.model.naming.ImplicitNamingStrategyComponentPathImpl 兼容JPA 1.0规范中的命名规范

spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

• Repository

@Repository
public interface UserRepository extends JpaRepository<BsUser,Integer> {

    public BsUser save(BsUser user);

    @Query(value = "SELECT u FROM BsUser u  where  uLoginName=:loginName")
    public BsUser findloginName(@Param("loginName") String loginName);

}

• 实体类

@Entity
@Table(name = "bs_user")
@Data
public class BsUser implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int uUserId;
    @Column(name = "u_name")
    private String uName;
    @Column(name = "u_loginName")
    private String uLoginName;
    @Column(name = "u_passWord")
    private String uPassWord;
    @Column(name = "u_salt")
    private String uSalt;

}

• 主函数

@SpringBootApplication
@EnableJpaRepositories
public class StudyApplication {
    public static void main(String[] args) {
        ApplicationContext context =   SpringApplication.run(StudyApplication.class, args);
        UserRepository userRpy = context.getBean(UserRepository.class);
        BsUser user= userRpy.findloginName("cyh");
        System.out.println("加密密码:"+user.getUPassWord());
    }

}