如何在 Spring Data JPA 中设置 Hibernate 命名策略

Posted 2023-02-26

【中文标题】如何在 Spring Data JPA 中设置 Hibernate 命名策略

【英文标题】：How to set Hibernate naming strategy in Spring Data JPA

【发布时间】：2016-01-26 09:10:34

【问题描述】：

我使用 Spring Data JPA 并使用多个数据库，所以我必须自己配置而不是使用 @HibernateJpaAutoConfiguration。

public class TesterDbConfig 

    @Autowired(required = false)
    private PersistenceUnitManager persistenceUnitManager;


    @Bean
    public JpaProperties testerJpaProperties() 
        JpaProperties jpaProperties = new JpaProperties();
        return jpaProperties;
    

    @Bean
    @Primary
    @ConfigurationProperties(prefix = "datasource.primary")
    public DataSource testerDataSource() 
        return (DataSource) DataSourceBuilder.create().type(DataSource.class).build();
    

    @Bean
    public LocalContainerEntityManagerFactoryBean testerEntityManager(
        JpaProperties testerJpaProperties) 
        EntityManagerFactoryBuilder builder = createEntityManagerFactoryBuilder(testerJpaProperties);
        return builder.dataSource(testerDataSource()).packages(Cabang.class).persistenceUnit("primary")
            .build();
    

    @Bean
    public JpaTransactionManager testerTransactionManager(EntityManagerFactory testerEntityManager) 
        return new JpaTransactionManager(testerEntityManager);
    

    private EntityManagerFactoryBuilder createEntityManagerFactoryBuilder(
        JpaProperties testerJpaProperties) 
        JpaVendorAdapter jpaVendorAdapter = createJpaVendorAdapter(testerJpaProperties);
        return new EntityManagerFactoryBuilder(jpaVendorAdapter, testerJpaProperties,
            this.persistenceUnitManager);
    

    private JpaVendorAdapter createJpaVendorAdapter(JpaProperties testerJpaProperties) 
        AbstractJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
        adapter.setShowSql(testerJpaProperties.isShowSql());
        adapter.setDatabase(testerJpaProperties.getDatabase());
        adapter.setDatabasePlatform(testerJpaProperties.getDatabasePlatform());
        adapter.setGenerateDdl(testerJpaProperties.isGenerateDdl());
        return adapter;
    

这样，每次创建模型时，我都必须在每个变量中使用@Column，因为在我的数据库中，我使用蛇形大小写，但在模型类中，我使用骆驼形大小写。

如何设置 Hibernate 命名策略？

【参考方案1】：

您可以通过 JpaProperties 进行设置，您已经在配置中使用了它：

@Bean
public JpaProperties testerJpaProperties() 
    JpaProperties jpaProperties = new JpaProperties();
    JpaProperties.Hibernate hibernate = new JpaProperties.Hibernate();
    hibernate.setNamingStrategy(SpringNamingStrategy.class);
    jpaProperties.setHibernate(hibernate);
    return jpaProperties;

并添加

@Bean
public LocalContainerEntityManagerFactoryBean testerEntityManager(
    JpaProperties testerJpaProperties) 
    EntityManagerFactoryBuilder builder = createEntityManagerFactoryBuilder(testerJpaProperties);
    return builder.dataSource(testerDataSource())
        .packages(Cabang.class)
        .persistenceUnit("primary")
        .properties(Collections.singletonMap("hibernate.ejb.naming_strategy",testerJpaProperties.getHibernate().getNamingStrategy()))
        .build();

【讨论】：

它仍然给出错误 org.postgresql.util.PSQLException: ERROR: column ... does not exist 因为它可能没有转换为蛇形大小写。命名策略错误？还是实施？

看起来除了在 JpaProperties 中设置之外，我还必须在 LocalContainerEntityManagerFactoryBean .properties(Collections.singletonMap("hibernate.ejb.naming_strategy",testerJpaProperties.getHibernate().getNamingStrategy())) 我从 link 中的示例中添加它