hibernate数据持久化组件



对象持久化，把数据保存在永久的存储介质中（数据库）

OR/M（object relation mapping）对象关系映射。

POJO类，就是标准的Java Bean。

Hibernate就是一个可以自动的根据xml完成对象关系映射，并持久化到数据库的开源组件。

Hibernate的底层也是有JDBC实现的。

hibernate是通过xml文件的配置，对数据库的底层的方言，以及数据库连接所需的信息，以及连接数据库的驱动。

hibernate的系统配置文件的名字一般叫做hibernate.cfg.xml，一般是映射类名加.hbm.xml。一般将映射类的xml文件和实体类放在一起。-hibernate data persistence component object persistence, the data stored in the permanent storage medium (database) OR/M (object relation mapping) object-relational mapping. POJO class, is the standard Java Bean. Hibernate is an automatic xml completed in accordance with object-relational mapping and persistence to the database of open source components. Hibernate is the underlying implementation of JDBC have. hibernate through the xml file configuration, the bottom of the database dialects, as well as the database connection information required, as well as database connectivity driver. hibernate the system configuration file name of the general called hibernate.cfg.xml, generally add the class name mapping. hbm.xml. Will be mapped the general category of xml documents and entity class together.