DataNucleus Access Platform 是一个兼容各种标准的 Java 数据持久化框架，兼容 JDO1, JDO2, JDO2.1, JDO2.2, JDO2.3, JPA1, JPA2 等 Java 标准。提供一个基于 REST 的API。通过它可以访问所有常见的数据库服务器，还包括 LDAP, NeoDatis, JSON, Excel/ODF spreadsheets, XML, BigTable, 和 HADOOP 数据库等.
DataNucleus Access Platform 3.2.8 发布，改进内容包括：
Support for multithreaded environments was improved.
Various persistence properties were made accessible from the PM/EM.
Some minor problems were fixed in JPA metamodel/criteria.
Support for persistence of interfaces with RDBMS was improved.
Support for streaming files to/from RDBMS was added.
Support for persisting files into local disk was added for RDBMS.
Support for persisting maps to Neo4j was added.
Support for evaluating various String/Collection query methods in a datastore with MongoDB was added
项目主页：http://www.datanucleus.org/products/accessplatform/
下载地址：http://sourceforge.net/projects/datanucleus/
来自:开源中国社区
