Spring 4 + Spring 存储库 + hibernate 5：错误创建 java 配置

Question

我有 spring 4 应用程序，我想使用 spring 存储库。我试过包括 spring jpa_hibernate

compile 'org.springframework.data:spring-data-jpa:1.11.4.RELEASE'
compile group: 'org.hibernate', name: 'hibernate-core', version: '5.0.5.Final'

并创建像oficial spring doc这样的配置：

@Configuration
@ComponentScan("my.domain")
@EnableJpaRepositories("my.domain")
@EnableTransactionManagement
public class ApplicationConfiguration {

    @Bean
    public Config getConfig() {
        return ConfigLoader.load();
    }

    @Bean
    @Autowired
    public DataSource getDatasource(Config config) throws Exception {
        Properties props = new Properties();
        Config dbConfig = config.getConfig("db.config");
        dbConfig.entrySet().forEach(entry -> props.put(entry.getKey(), entry.getValue().unwrapped()));
        return new DataSourceFactory().createDataSource(props);
    }

    @Bean
    @Autowired
    public NamedParameterJdbcTemplate getJdbcTemplate(DataSource datasource) {
        return new NamedParameterJdbcTemplate(datasource);
    }

    @Bean
    @Autowired
    public PlatformTransactionManager getTransactionManager(DataSource datasource) {
        return new DataSourceTransactionManager(datasource);
    }

    @Bean
    @Autowired
    public EntityManagerFactory entityManagerFactory(DataSource datasource) {

        HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
        vendorAdapter.setGenerateDdl(true);

        LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
        factory.setJpaVendorAdapter(vendorAdapter);
        factory.setDataSource(datasource);
        factory.afterPropertiesSet();
        return factory.getObject();
    }

    @Bean
    @Autowired
    public PlatformTransactionManager transactionManager(DataSource datasource) {

        JpaTransactionManager txManager = new JpaTransactionManager();
        txManager.setEntityManagerFactory(entityManagerFactory(datasource));
        return txManager;
    }
}

但尝试运行应用时出现错误：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in my.ApplicationConfiguration: 
Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate 
[javax.persistence.EntityManagerFactory]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.IllegalStateException: 
Failed to determine Hibernate PersistenceProvider

我在 springboot 中使用了存储库并在文件中进行了配置，但我没有找到 java config spring 的实际示例（仅启动简单的核心应用程序）

Answer 1

当您使用最新的 Spring Data 版本时，请升级到最新的 Hibernate 版本：

compile group: 'org.hibernate', name: 'hibernate-core', version: '5.2.10.Final'

Spring 需要 hibernate 的 EntityManagerFactory 实现，该实现以前由单独的 jar 提供，现在已弃用，因此您只需要单个 hibernate-core 依赖项。

还可以考虑使用以下配置：

@Configuration
@ComponentScan("my.domain")
@EnableJpaRepositories("my.domain")
@EnableTransactionManagement
public class ApplicationConfiguration {

    @Bean
    public Config getConfig() {
        return ConfigLoader.load();
    }

    @Bean
    public DataSource getDatasource(Config config) throws Exception {
        Properties props = new Properties();
        Config dbConfig = config.getConfig("db.config");
        dbConfig.entrySet().forEach(entry -> props.put(entry.getKey(), entry.getValue().unwrapped()));
        return new DataSourceFactory().createDataSource(props);
    }

    @Bean
    public NamedParameterJdbcTemplate getJdbcTemplate(DataSource datasource) {
        return new NamedParameterJdbcTemplate(datasource);
    }

    @Bean
    @Autowired
    public PlatformTransactionManager getTransactionManager(DataSource datasource) {
        return new DataSourceTransactionManager(datasource);
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {

        HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
        vendorAdapter.setGenerateDdl(true);

        LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
        factory.setJpaVendorAdapter(vendorAdapter);
        factory.setDataSource(dataSource());
        factory.setPackagesToScan("my.domain");

        return factory;
    }

    @Bean
    public PlatformTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
        JpaTransactionManager txManager = new JpaTransactionManager();
        txManager.setEntityManagerFactory(entityManagerFactory);

        return txManager;
    }

}

您参考的是旧的 spring 数据文档，当前版本是 available here。