编写第一个Hibernate程序的时候，就发现出现了错误



Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not insert: [zhongfucheng.domain.User]

    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:92)

    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)

    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64)

    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2327)

    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2834)

    at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71)

    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)

    at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:320)

    at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)

    at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)

    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)

    at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)

    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)

    at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)

    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)

    at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)

    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)

    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)

    at zhongfucheng.domain.App.main(App.java:39)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke(Method.java:601)

    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'zhongfucheng.user' doesn't exist

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)

    at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)

    at com.mysql.jdbc.Util.getInstance(Util.java:381)

    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)

    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)

    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3515)

    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)

    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)

    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)

    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2554)

    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1761)

    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2046)

    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1964)

    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1949)

    at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:94)

    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:57)

    ... 21 more

它说是由引起的…

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'zhongfucheng.user' does

因为我在配置映射关系的时候，使用了自动增长序列，而我的id字段又是为String，所以出错了！

        <!--主键映射，属性名为id，列名也为id-->

        <id name="id" column="id">

            <!--根据底层数据库环境自动增长主键-->

            <generator class="native"/>

        </id>

因此，将JavaBean对象的id设置成int类型就可以解决问题了！

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