摘要：
http://openjpa.apache.org/builds/latest/docs/manual/main.htmlJPA 2.xJSR(Java Specification Request)java规范要求http://baike.baidu.com/view/960671.htm如JDBC, JDO等。。。Why JPA? Java developers who need to store and retrieve persistent data already have several options available to them: serialization, JDBC, 阅读全文
