OpenXava是一个让使用XML与Java来开发J2EE商业应用程序变得简单的框架.OpenXava不使用常见的MVC架构，它是一个JPA应用程序引擎，你能够通过JDK5.0注解或XML描述对象-关系表的映射关系，并将运行期实体对象持久化到数据库中去。
使用OpenXava你只需要写model，POJOs，和Java 5 annotations，你不用写view，也不用写controller。
Changes:
1. A critical bug in which list and collections are not shown inside dialogs was fixed.
2. Support was added for @PrimaryKeyJoinColumn and @PrimaryKeyJoinColumns JPA annotations in @OneToOne relationships.
3. A problem in which failed properties are not marked in the UI when using Bean Validation (JSR-303) was fixed.
4. @Max from JSR-303 no longer limits the characters that a user can type in the editor
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