DataNucleus Access Platform 是一個兼容各種標(biāo)準(zhǔn)的 Java 數(shù)據(jù)持久化框架，兼容 JDO1, JDO2, JDO2.1, JDO2.2, JDO2.3, JPA1, JPA2 等 Java 標(biāo)準(zhǔn)。提供一個基于 REST 的API。通過它可以訪問所有常見的數(shù)據(jù)庫服務(wù)器，還包括 LDAP, NeoDatis, JSON, Excel/ODF spreadsheets, XML, BigTable, 和 HADOOP 數(shù)據(jù)庫等。

DataNucleus Access Platform 發(fā)布了 3.1 的***里程碑，

該版本改進(jìn)記錄包括：

1. javax.time is now supported out of the box.
2. Support for bulk loading from datastore via PM.getObjectsById was added.
3. Support for JPA2.1 AttributeConverter API was added.
4. Support for multitenancy via discriminator for HBase was added.
5. Support for JDO/JPA schema naming conventions was added for ODF, Excel, MongoDB, HBase, and JSON datastores.
6. A new internal generic type converter API was added, and is supported for RDBMS, ODF, Excel, MongoDB, HBase, and JSON datastores.

下載地址：http://sourceforge.net/projects/datanucleus/

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