1、在pom.xml中引入相关jar包

 <!-- spring data jpa -->
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
 
   
    <!-- 内存数据库hsqldb --> 
    <dependency>
        <groupId>org.hsqldb</groupId>
        <artifactId>hsqldb</artifactId>
        <scope>runtime</scope>
    </dependency>

2、配置yml，将数据写入硬盘

spring:
  jpa:
    show-sql: false
    hibernate:
      ddl-auto: update
  datasource:
    url: jdbc:hsqldb:file:C:/rct/db/rct-db
    username: admin
    password: admin
    driverClassName: org.hsqldb.jdbcDriver

3、使用jpa注解，并设定自增主键，如果想某些属性不存入数据库，应使用@Transient注解

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class Update {
    @Id
    @GeneratedValue
    protected Long id;
    String version;//当前版本

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }
}

4、创建dao

import com.smart.rct.domain.Update;
import org.springframework.data.repository.CrudRepository;

public interface UpdateDao extends CrudRepository<Update, Long> {
}

5、保存数据

 6、创建接口，获取数据

    @ApiOperation(value = "查询历史版本")
    @GetMapping("findAllVersion")
    public List<Update> findAllVersion() {
        return (List<Update>) updateDao.findAll();
    }

6、查看结果