使用JDO自动创建数据库表-AutocreationofdatabasetablesusingJDO

I am new to JDO and MySQL. In my project, i want that all entities should be converted in table automatically.

我是JDO和MySQL的新手。在我的项目中,我希望所有实体都应该自动转换为表格。

I had start using the JDO and defined properties like this,

我开始使用JDO并定义了这样的属性,

javax.jdo.PersistenceManagerFactoryClass=org.datanucleus.api.jdo.JDOPersistenceManagerFactory


datanucleus.autoCreateSchema=true
datanucleus.validateTables=false
datanucleus.validateCOnstraints=false
datanucleus.query.sql.allowAll = true

javax.jdo.option.COnnectionDriverName=com.mysql.jdbc.Driver
javax.jdo.option.COnnectionURL=jdbc:mysql://127.0.0.1:3306/db_name
javax.jdo.option.COnnectionUserName=user
javax.jdo.option.COnnectionPassword=123456
javax.jdo.option.Mapping=hsql

Sample entity:

@PersistenceCapable(identityType = IdentityType.APPLICATION, table = "heartbeat")
public class HeartBeat implements Serializable{
    @PrimaryKey
    @Column(length=128)
    private String userId;
.......
}

Now, when i compile or run my application the tables are not being auto created. I am not sure which property i should use for auto creation of tables based on the entities created.

现在,当我编译或运行我的应用程序时,表格不是自动创建的。我不确定我应该使用哪个属性来根据创建的实体自动创建表。

Please bear with my question as i am new to JDO and MySQL integration.

请关注我的问题,因为我是JDO和MySQL集成的新手。

Thanks in advance.

提前致谢。

1 个解决方案