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);
- ...
- }
此次更新的主要内容:
◆ This release fixes all known issues.
◆ All functionality/features have been thoroughly tested on every major database platform (Oracle, DB2, PostgreSql, Mysql, SQL Server, HSQL, H2, and Derby).
◆ 支持Blog和Transaction
◆ 支持存储过程
原文链接:http://www.oschina.net/news/24155/easy-java-persistence-35
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