Question

我在hibernate配置下使用，当我从Postman客户端调用create方法时，我得到SQLGrammerException而不是创建表并将值插入数据库。请检查下面的配置，让我知道如何创建表并更新它？

CONFIGURATION_FILE -

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
    <bean id="dbPropertyConfigurer"
            class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>/WEB-INF/db_config.properties</value>
            </list>
        </property>
    </bean>
    <!-- Database Properties -->
    <bean id="dataSource"
        class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"
                p:driverClass="${jdbc.driver.className}"
                p:jdbcUrl="${jdbc.url}"
                p:user="${jdbc.username}"
                p:password="${jdbc.password}"               
                />
    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> 
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${jdbc.hibernate.dialect}</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hbm2ddl.auto">update</prop>
            </props>
        </property>
        <property name="packagesToScan" value="com.entity" />
    </bean>
    <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager" />
</beans>

Pojo类包含用于定义列和主键的JPA注释@Id，@ Column和用于定义表和实体值的@Entity和@Table。

Answer 1

实际上，上述配置不正确。

<prop key="hbm2ddl.auto">update</prop>

以上应该是 -

<prop key="hibernate.hbm2ddl.auto">update</prop>

及其完成。

Answer 2

如果该表不存在且您想通过休眠创建它，则应将hbm2ddl值设置为create（<prop key="hibernate.hbm2ddl.auto">create</prop>）

表未在数据库中创建

2 个答案: