swing Exception in thread "AWT-EventQueue-0" javax.persistence.PersistenceException: No Persistence provider for EntityManager named null at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:) at javax.persistence.Persist…

控制台下输出信息 原因:persistence.xml必须放在src下META-INF里面. 若误放在其他路径,就会迷路.…

Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: Cannot open connection 检查一下 数据源 配置, 看你的异常应该是 使用 JTA 事物 ,容器没有实例化 EntityManager <?xml version="…

Java jpa调用存储过程,抛出异常如下: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: ResultSet is from UPDATE. No Data. at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1361) at org.hiberna…

问题现象 查看 [root@cmbigdata1 cloudera-scm-server]# pwd /var/log/cloudera-scm-server [root@cmbigdata1 cloudera-scm-server]# cat cloudera-scm-server.log 是如下的问题: Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException…

javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: 再用jpa+spring+struts2开发的是时候遇到一个问题(采用了注解的方式,xml配置的道理是一样的),当我在注册用户的时候,注册第一个用户没有问题,但注册第二个用户开始就会抛出一个异常: javax.persistence.PersistenceExcept…

javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: com.qingmu.Customer at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1692) at org.hibernate.j…

javax.persistence.PersistenceException: Unable to build entity manager factory at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:66) at javax.persistence.Persistence.createEntityManagerFact…

SQLite数据库和JPA简单介绍 一.SQLite简单使用 SQLite是遵循ACID的关系数据库管理系统,它的处理速度很快,它的设计目标是嵌入式的,只需要几百K的内存就可以了. 1.下载SQLitehttp://www.sqlite.org/download.htmlsqlite-dll-win32-x86-201410071659.zip(294.11 KiB)sqlite-shell-win32-x86-3080600.zip解压在文件夹D:\Database\sqlite下,得到文件s…

JPA JPA全称Java Persistence API. JPA通过JDK 5.0注解或XML描述对象-关系表的映射关系,并将运行期的实体对象持久化到数据库中. Hibernate3.2+.TopLink(EclipseLink)以及OpenJPA都提供了JPA的实现. 搭建JPA开发环境 JPA依赖的jar文件.数据库驱动文件 配置文件:META-INF\persistence.xml 领域对象,POJO EntityManagerFactory 异常 javax.persistence.…