轻松使用hsqldb小型数据库

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