Spring 在hibernate中使用标识插入数据时出错_Spring_Oracle_Hibernate_Hibernate Mapping

Spring 在hibernate中使用标识插入数据时出错

spring oracle hibernate

Spring 在hibernate中使用标识插入数据时出错,spring,oracle,hibernate,hibernate-mapping,Spring,Oracle,Hibernate,Hibernate Mapping,我遇到了在数据库中插入数据的问题，其中STOCK_ID是identity，STOCK_NAME是string。在数据库中插入数据时，它显示了一个异常，如下所述。请指导我纠正这个问题 Hibernate: insert into mkyongdb.system.STOCK (STOCK_NAME) values (?) Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not insert:

我遇到了在数据库中插入数据的问题，其中STOCK_ID是identity，STOCK_NAME是string。在数据库中插入数据时，它显示了一个异常，如下所述。请指导我纠正这个问题

Hibernate: insert into mkyongdb.system.STOCK (STOCK_NAME) values (?)
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not insert: [com.mkyong.user.Stock]
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:92)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
    at org.hibernate.id.insert.AbstractSelectingDelegate.performInsert(AbstractSelectingDelegate.java:64)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2345)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2852)
    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 com.mkyong.common.App.main(App.java:45)
Caused by: java.sql.SQLSyntaxErrorException: ORA-00926: missing VALUES keyword

    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:440)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
    at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:837)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:445)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:191)
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:523)
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:207)
    at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:1010)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1315)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3576)
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3657)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeUpdate(OraclePreparedStatementWrapper.java:1350)
    at org.hibernate.id.insert.AbstractSelectingDelegate.performInsert(AbstractSelectingDelegate.java:57)
    ... 16 more

Stock.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="com.mkyong.user.Stock" table="STOCK" catalog="mkyongdb">
        <id name="stockId" type="java.lang.Integer">
            <column name="STOCK_ID" />
            <generator class="identity" />
        </id>
        <property name="stockName" type="string">
            <column name="STOCK_NAME" length="10"  />
        </property>

        <!-- <one-to-one name="stockDetail" class="com.mkyong.user.StockDetail"
            cascade="save-update"></one-to-one> -->
    </class>
</hibernate-mapping>

<?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.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="hibernate.connection.url">jdbc:oracle:thin:@127.0.0.1:1521/xe</property>
        <property name="hibernate.connection.username">system</property>
        <property name="hibernate.connection.password">admin</property>
        <property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>

        <property name="show_sql">true</property>
        <property name="hibernate.default_schema">system</property> 
        <property name="hibernate.hbm2ddl.auto">validate</property>
        <mapping resource="com/mkyong/user/DBUser.hbm.xml"></mapping>
        <mapping resource="com/mkyong/user/Stock.hbm.xml" />
    <mapping resource="com/mkyong/user/StockDetails.hbm.xml" />
    </session-factory>
</hibernate-configuration>

Main.java

Session session = HibernateUtil.getSessionFactory().openSession();

        session.beginTransaction();

        Stock stock = new Stock();

        stock.setStockName("sam");


        session.save(stock);
        session.getTransaction().commit();

创建查询：

CREATE TABLE STOCK
(
  STOCK_ID numeric(10) not null,
  STOCK_NAME varchar2(50) not null,
  CONSTRAINT STOCK_PK PRIMARY KEY (STOCK_ID)
);

我认为
```
mkyongdb
```
是您的模式，它的表名为
```
STOCK
```
。所以使用
```
mkyongdb.STOCK
```
而不是中的
```
mkyongdb.system.STOCK
```
```
插入
```
语句

STOCK\u ID

是必填字段，在

insert

语句中缺失

（顺便说一句，如果您使用Oracle12c，该字段可能不包括在

insert

语句中，前提是定义为

STOCK\u ID numeric（10）默认情况下，在create table
DDL语句中直接以null as IDENTITY

生成，而不需要触发器等任何其他机制。如果您的版本是12c之前的版本，则可以在insert之前创建

触发器，其中包括：new.STOCK_ID:=seq_STOCK_ID.nextval；
语句，其中seq STOCK_ID
（是一个序列）

您错过了冬眠annotations@NiVeR：我正在处理XML映射您选择这样做了吗？现在有更好的方法。你说STOCK_ID是identity，但你似乎没有在表定义中创建序列/触发器或使用作为identity关键字。请参阅我对Barbaros答案的评论中的链接。这取决于您的Oracle版本。或者，如果您使用的是11g，则需要触发器/序列来创建标识/自动增量列。
CREATE TABLE STOCK
(
  STOCK_ID numeric(10) not null,
  STOCK_NAME varchar2(50) not null,
  CONSTRAINT STOCK_PK PRIMARY KEY (STOCK_ID)
);