EntityManager를 사용하여 최대 절전 모드를 실행할 수 없습니다.

Question

Cristian Bauer가 작성한 "Java Persistence with Hibernate"책인 & Gavin King을 사용하여 간단한 hello world 프로그램을 실행하려고합니다. 내가 만든 변경 사항은 SessionFactory 나 Annotaion으로 최대 절전 모드를 사용할 때 일들이 작동하기 때문에 HSQLDB에서 MySQL.Code로 데이터베이스를 변경하는 것이 중요하지 않습니다. 로그에 테이블을 찾을 수 없다고 기록되어 있습니다. 여기 제의 persistence.xml이다 "hbm2ddl.auto"속성으로

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"> 
<persistence-unit name="helloworld" transaction-type="RESOURCE_LOCAL"> 
    <class>hello.Message</class> 
    <properties> 
     <property name="hibernate.archive.autodetection" value="class, hbm"/> 
     <property name="hibernate.show_sql" value="true"/> 
     <property name="hibernate.format_sql" value="true"/> 
     <property name="use_sql_comments" value="true"/> 
     <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/> 
     <property name="hibernate.connection.url" value="jdbc:mysql://localhost/helloworldjpa"/> 
     <property name="hibernate.connection.username" value="root"/> 
     <property name="hibernate.connection.password" value="xxxx"/> 
     <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> 
     <property name="hbm2ddl.auto" value="update"/> 
     <property name="hibernate.c3p0.min_size" value="5"/> 
     <property name="hibernate.c3p0.max_size" value="20"/> 
     <property name="hibernate.c3p0.timeout" value="300"/> 
     <property name="hibernate.c3p0.max_statements" value="50"/> 
     <property name="hibernate.c3p0.idle_test_period" value="3000"/> 
    </properties> 
</persistence-unit> 

내가 created.If 내가 수동으로 스키마를 만들 얻을 수있는 스키마를 예상 업데이트입니다, 그것을 잘 작동합니다. 로그이 likle 읽 hbm2ddl.auto가 hibernate.hbm2ddl.auto해야하기 때문에

Hibernate: 
insert 
into 
    MESSAGES 
    (MESSAGE_TEXT, NEXT_MESSAGE_ID) 
values 
    (?, ?) 
21:26:57,703 WARN JDBCExceptionReporter:71 - SQL Error: 1146, SQLState: 42S02 
21:26:57,718 ERROR JDBCExceptionReporter:72 - Table 'helloworldjpa.messages' doesn't exist 
Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not insert: [hello.Message] 
    at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:647) 
    at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:218) 
    at hello.HelloWorld.main(HelloWorld.java:20) 
Caused by: org.hibernate.exception.SQLGrammarException: could not insert: [hello.Message] 
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67) 
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) 
    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:40) 
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2093) 
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2573) 
    at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:47) 
    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248) 
    at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:290) 
    at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:180) 
    at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:108) 
    at org.hibernate.event.def.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:131) 
    at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:87) 
    at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:38) 
    at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:618) 
    at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:592) 
    at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:596) 
    at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:212) 
    ... 1 more 
Caused by: com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: Table 'helloworldjpa.messages' doesn't exist 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1026) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956) 
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491) 
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423) 
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936) 
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060) 
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2542) 
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1734) 
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2019) 
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1937) 
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1922) 
    at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:105) 
    at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:73) 
    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33) 
    ... 15 more 

Answer 1

스키마가 생성되지 않습니다 :

<property name="hibernate.hbm2ddl.auto" value="update"/>