EJP是一个强大并且易于使用的关系数据库持久化Java API。EJP的主要特性包括:
1、对象/关系(object/relational)自动映射(A-O/RM) 2、自动处理所有关联 3、自动持久化跟踪
EJP不需要映射注释或XML配置,并且不需要继承任何类或实现任何接口。EJP只用到了Plain Old Java Objects (POJOs)对象。到目前为止,EJP是Java开源中最简单的持久化API。
示例代码:
public static void main(String[] args) { DatabaseManager dbm = _DatabaseManager.getDatabaseManager_ (...); dbm. _saveObject_ (new Customer("Smith", "John")); Customer customer; if ((customer = dbm. _loadObject_ (new Customer("Smith"))) != null) { customer.getSupport().add(new Support(...)); dbm. _saveObject_ (customer); } Collection<Customer> list = new ArrayList<Customer>(); list = dbm. _loadObjects_ (list, Customer.class); ... }