如何在 Spring Data JPA 中设置 Hibernate 命名策略

Question

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？

Answer 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();
}