在不使用XML的情况下配置JPA / Hibernate / PostgreSQL

将以下片段放入带有

@Configuration

@EnableTransactionManagement

Hibernate / JPA（编辑packagesToScan字符串）：

@Beanpublic LocalContainerEntityManagerFactoryBean entityManagerFactory() {    LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();    em.setDataSource(dataSource());    em.setPackagesToScan(new String[] { "com.XY.model" });    JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();    em.setJpaVendorAdapter(vendorAdapter);    em.setJpaProperties(additionalProperties());    return em;}Properties additionalProperties() {    Properties properties = new Properties();    properties.setProperty("hibernate.hbm2ddl.auto", "update");    properties.setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQL9Dialect");    properties.setProperty("hibernate.show_sql", "true");    return properties;}

数据源（编辑用户名，密码和主机地址）：

@Beanpublic DataSource dataSource() {    DriverManagerDataSource dataSource = new DriverManagerDataSource();    dataSource.setDriverClassName("org.postgresql.Driver");    dataSource.setUrl("jdbc:postgresql://localhost:port/DB_NAME");    dataSource.setUsername("root");    dataSource.setPassword("");    return dataSource;}

交易经理：

@Beanpublic PlatformTransactionManager transactionManager(EntityManagerFactory emf) {    JpaTransactionManager transactionManager = new JpaTransactionManager();    transactionManager.setEntityManagerFactory(emf);    return transactionManager;}