spring - hibernate 5命名策略配置 [英] spring - hibernate 5 naming strategy configuration
问题描述
我使用postgresql数据库和spring + hibernate框架编写应用程序。
I am writing application using postgresql database and spring + hibernate frameworks.
我将spring框架从4.1.5.RELEASE升级到4.2.0.RELEASE版本并升级hibernate框架从4.3.7.Final到5.0.0.Final版本。
I upgraded spring framework from 4.1.5.RELEASE to 4.2.0.RELEASE version and upgraded hibernate framework from 4.3.7.Final to 5.0.0.Final version.
升级后,我遇到了NamingStrategy的问题。在postgresql数据库中,表列名以小写字母分隔,以下划线分隔,在应用程序层中,bean属性位于camelcase中。
After upgrade I have problems with NamingStrategy. In postgresql database, table column names are in lowercase separated by underscore, in application layer, bean properties are in camelcase.
这是旧版本的配置文件: / p>
This is working spring configuration file for older version:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:component-scan base-package="fms" />
<bean id="microFmsDataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close">
<property name="driverClassName" value="org.postgresql.Driver" />
<property name="url" value="***" />
<property name="username" value="***" />
<property name="password" value="***" />
<property name="testOnBorrow" value="true" />
<property name="testOnReturn" value="true" />
<property name="testWhileIdle" value="true" />
<property name="validationQuery" value="select 1" />
<property name="initialSize" value="5" />
<property name="minIdle" value="10" />
<property name="maxIdle" value="100" />
<property name="maxActive" value="100" />
<property name="removeAbandoned" value="true" />
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="microFmsDataSource"/>
<property name="packagesToScan">
<list>
<value>fms</value>
</list>
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="jpaPropertyMap">
<map>
<entry key="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider" />
<entry key="hibernate.hbm2ddl.auto" value="validate" />
<entry key="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
<entry key="hibernate.show_sql" value="true" />
<entry key="hibernate.format_sql" value="true" />
<entry key="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.ImprovedNamingStrategy" />
</map>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
升级后,我更改了NamingStrategy配置:
After upgrade I changed NamingStrategy configuration:
<entry key="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.ImprovedNamingStrategy" />
如下:
<entry key="hibernate.implicit_naming_strategy" value="***" />
并尝试了hibernate javadoc中列出的所有选项: https://docs.jboss.org/hibernate/orm/5.0/javadocs/org/hibernate/cfg/ AvailableSettings.html#IMPLICIT_NAMING_STRATEGY
and tried all variants of options listed in hibernate javadoc: https://docs.jboss.org/hibernate/orm/5.0/javadocs/org/hibernate/cfg/AvailableSettings.html#IMPLICIT_NAMING_STRATEGY
但未成功。
你能告诉我什么是
推荐答案
我认为我找到了解决方案。
I think I found the solution.
为了实现我的目标,我使用了 hibernate.physical_naming_strategy
配置,而不是 hibernate.implicit_naming_strategy
。
To achieve my goal, I used hibernate.physical_naming_strategy
configuration, instead of hibernate.implicit_naming_strategy
.
我创建了一个 PhysicalNamingStrategy
接口的实现,它模拟了原始 ImprovedNamingStrategy
class:
I created an implementation of the PhysicalNamingStrategy
interface which simulates part of the functionality of the original ImprovedNamingStrategy
class:
package fms.util.hibernate;
import org.apache.commons.lang.StringUtils;
import org.hibernate.boot.model.naming.Identifier;
import org.hibernate.boot.model.naming.PhysicalNamingStrategy;
import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
public class ImprovedNamingStrategy implements PhysicalNamingStrategy {
@Override
public Identifier toPhysicalCatalogName(Identifier identifier, JdbcEnvironment jdbcEnv) {
return convert(identifier);
}
@Override
public Identifier toPhysicalColumnName(Identifier identifier, JdbcEnvironment jdbcEnv) {
return convert(identifier);
}
@Override
public Identifier toPhysicalSchemaName(Identifier identifier, JdbcEnvironment jdbcEnv) {
return convert(identifier);
}
@Override
public Identifier toPhysicalSequenceName(Identifier identifier, JdbcEnvironment jdbcEnv) {
return convert(identifier);
}
@Override
public Identifier toPhysicalTableName(Identifier identifier, JdbcEnvironment jdbcEnv) {
return convert(identifier);
}
private Identifier convert(Identifier identifier) {
if (identifier == null || StringUtils.isBlank(identifier.getText())) {
return identifier;
}
String regex = "([a-z])([A-Z])";
String replacement = "$1_$2";
String newName = identifier.getText().replaceAll(regex, replacement).toLowerCase();
return Identifier.toIdentifier(newName);
}
}
创建此类后, :
<entry key="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.ImprovedNamingStrategy" />
:
<entry key="hibernate.physical_naming_strategy" value="fms.util.hibernate.ImprovedNamingStrategy" />
现在一切正常。
此解决方案仅涵盖 ImprovedNamingStrategy
的一小部分。在我的项目中,对于表映射和连接映射,我始终明确地指定表或连接列的名称。我依靠隐式名称转换只为列名。所以这个简单的解决方案对我来说是可以接受的。
This solution covers only small part of ImprovedNamingStrategy
. In my project, for table mapping and join mapping, I always specify the name of table or join column explicitly. I rely on implicit name conversion only for column names. So this simple solution was acceptable for me.
这是我的Spring配置文件的完整示例:
This is a full example of my Spring configuration file:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:component-scan base-package="fms" />
<bean id="microFmsDataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close">
<property name="driverClassName" value="org.postgresql.Driver" />
<property name="url" value="***" />
<property name="username" value="***" />
<property name="password" value="***" />
<property name="testOnBorrow" value="true" />
<property name="testOnReturn" value="true" />
<property name="testWhileIdle" value="true" />
<property name="validationQuery" value="select 1" />
<property name="initialSize" value="5" />
<property name="minIdle" value="10" />
<property name="maxIdle" value="100" />
<property name="maxActive" value="100" />
<property name="removeAbandoned" value="true" />
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="microFmsDataSource"/>
<property name="packagesToScan">
<list>
<value>fms</value>
</list>
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="jpaPropertyMap">
<map>
<entry key="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider" />
<entry key="hibernate.hbm2ddl.auto" value="validate" />
<entry key="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
<entry key="hibernate.show_sql" value="true" />
<entry key="hibernate.format_sql" value="true" />
<entry key="hibernate.physical_naming_strategy" value="fms.util.hibernate.ImprovedNamingStrategy" />
</map>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
我希望这个解决方案对某人有帮助。 :)
I hope this solution will be helpful for somebody. :)
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