Java 你好,世界冬眠
正在尝试使用SQLightHybernate运行简单java项目。出现异常:Java 你好,世界冬眠,java,database,hibernate,sqlite,Java,Database,Hibernate,Sqlite,正在尝试使用SQLightHybernate运行简单java项目。出现异常: Deleting Doc Hibernate: delete from Doc Updating document, DocID = 2, Name = doc 2 Hibernate: update Doc set DocName=?, Job=? where Id=? exception Batch update returned unexpected row count from update [0]; actu
Deleting Doc
Hibernate: delete from Doc
Updating document, DocID = 2, Name = doc 2
Hibernate: update Doc set DocName=?, Job=? where Id=?
exception Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
Jun 15, 2016 3:30:03 PM org.hibernate.event.def.AbstractFlushingEventListener performExecutions
SEVERE: Could not synchronize database state with session
org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:85)
at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:70)
at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:47)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2574)
at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2478)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2805)
at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:114)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:267)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:259)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:179)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1206)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:375)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137)
at hyberntst.Db2.close(Db2.java:46)
at hyberntst.Db2.saveDoc(Db2.java:75)
at hyberntst.HybernTst.main(HybernTst.java:19)
我在data.db中有空表文档
CREATE TABLE `Doc` (
`Id` INTEGER PRIMARY KEY AUTOINCREMENT,
`DocName` TEXT,
`Job` TEXT
)
Hybernate配置-Hybernate.cfg.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">hyberntst.SQLiteDialect</property>
<property name="hibernate.connection.driver_class">org.sqlite.JDBC</property>
<property name="hibernate.connection.url">jdbc:sqlite:data.db</property>
<property name="hibernate.connection.pool_size">1</property>
<property name="hibernate.show_sql">true</property>
<!--property name="hibernate.current_session_context_class">thread</property-->
<!--property name="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</property-->
<property name="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<mapping resource="hyberntst/Doc.hbm.xml"/>
</session-factory>
</hibernate-configuration>
用于写入数据库的文档类:
public class Doc {
private Integer id;
public Integer getId()
{
return this.id;
}
public void setId(Integer id)
{
this.id = id;
}
private String docName;
public String getDocName()
{
return this.docName;
}
public void setDocName(String docName)
{
this.docName = docName;
}
private String job;
public String getJob()
{
return this.docName;
}
public void setJob(String job)
{
this.job = job;
}
}
“主要”代码:
在这里,您可以看到我使用的LIB:
看起来从数据库中删除工作正常,但插入有什么问题
日志文件中的问号parmas是什么
Hibernate: update Doc set DocName=?, Job=? where Id=?
通常,如果实体id不为null,hibernate将执行更新。
更多信息:
saveOrUpdate()执行以下操作:
- 如果该对象在此会话中已持久化,则在以下情况下不执行任何操作:
与会话关联的另一个对象具有相同的标识符,
抛出异常
- 如果对象没有标识符属性,则保存它()
- 如果对象的标识符具有分配给新实例化对象的值,则将其保存()
- 如果对象由or进行版本控制,并且版本属性值与分配给新对象的值相同
实例化对象,保存()它
- 否则,更新()对象
您必须显式调用save()
或将id
null通常,如果实体id不为null,hibernate将执行更新。
更多信息:
saveOrUpdate()执行以下操作:
- 如果该对象在此会话中已持久化,则在以下情况下不执行任何操作:
与会话关联的另一个对象具有相同的标识符,
抛出异常
- 如果对象没有标识符属性,则保存它()
- 如果对象的标识符具有分配给新实例化对象的值,则将其保存()
- 如果对象由or进行版本控制,并且版本属性值与分配给新对象的值相同
实例化对象,保存()它
- 否则,更新()对象
您必须显式调用save()
或将id
null保留为空,表为空。我想我正在尝试插入记录它叫Hibernate,而不是Hybernate-如果你真的调用了你的配置文件Hybernate.cfg.xml
,那么它就不起作用了,因为它将寻找Hibernate.cfg.xml
。是的,我有Hibernate.cfg.xmlYes,表是空的。我想我正在尝试插入记录它叫Hibernate,而不是Hybernate-如果你真的调用了你的配置文件Hybernate.cfg.xml
,那么它就不起作用了,因为它将寻找Hibernate.cfg.xml
。是的,我有Hibernate.cfg.xml
Doc d = new Doc();
d.setId(new Integer(2));
d.setDocName("doc 2");
d.setJob("job 2");
Db2 db2 = new Db2();
db2.deleteDoc();
db2.saveDoc(d);
Hibernate: update Doc set DocName=?, Job=? where Id=?