对象持久化常用方法研究

Methods of keeping data persistence

持久化是一种存储对象的内部状态以备以后使用的机制。若要把暂态对象永久保留,就必须把对象转换成一定格式的数据存储在文件或数据库中。通过对内嵌SQL、紧耦合和健壮持久层技术等3种常用持久化方法的研究,说明各自的特点,指出其优点和不足,为应用程序开发者在选择对象存储方法上提供参考。

Persistence is a mechanism for storing data persistently. The data should be transformed and stored in file systems or databases to be permanent. The three methods of keeping data persistence in the databases are discussed, i.e, hand coded or embedded SQL, tight map definitionobject binding and robust persistence layer. The advantages and disadvantages , thus providing reference for the program developers of the three methods are presented. 