我正在按照Spring书中的示例创建一个小的网络商店应用程序。
该示例使用 hsqldb 嵌入式数据库,但我不想使用它。
我想连接到 MySQL 数据库,然后使用 Hibernate sessionFractory 。
我以这种方式编辑了示例代码:
@Configuration
@ComponentScan("com.packagename.webstore")
public class RootApplicationContextConfig {
@Bean
public DataSource dataSource() {
// this is the original code of the example
/*EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
EmbeddedDatabase db = builder
.setType(EmbeddedDatabaseType.HSQL)
.addScript("db/sql/create-table.sql")
.addScript("db/sql/insert-data.sql")
.build();
return db; */
//this is my code
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/dbName");
dataSource.setUsername( "user" );
dataSource.setPassword( "pass" );
return dataSource;
}
}
然后,在我的班级中,我以这种方式访问数据源:
@Autowired
private DataSource datasource;
...
Connection connection = datasource.getConnection();
...
我做的对吗?
如果以后要使用Hibernate sessionFactory,应该如何编辑代码?
谢谢你们
答案 0 :(得分:0)
如果要使用spring配置SessionFactory,则可以像下面那样创建所需的bean
@Configuration
@EnableTransactionManagement
@PropertySource({ "classpath:persistence-mysql.properties" })
@ComponentScan({ "org.baeldung.spring.persistence" })
public class PersistenceConfig {
@Autowired
private Environment env;
@Bean
public LocalSessionFactoryBean sessionFactory() {
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
sessionFactory.setDataSource(restDataSource());
sessionFactory.setPackagesToScan(
new String[] { "entity class package name so it can scan them" });
sessionFactory.setHibernateProperties(hibernateProperties());
return sessionFactory;
}
@Bean
public DataSource restDataSource() {
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName(env.getProperty("jdbc.driverClassName"));
dataSource.setUrl(env.getProperty("jdbc.url"));
dataSource.setUsername(env.getProperty("jdbc.user"));
dataSource.setPassword(env.getProperty("jdbc.pass"));
return dataSource;
}
@Bean
@Autowired
public HibernateTransactionManager transactionManager(
SessionFactory sessionFactory) {
HibernateTransactionManager txManager
= new HibernateTransactionManager();
txManager.setSessionFactory(sessionFactory);
return txManager;
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
Properties hibernateProperties() {
return new Properties() {
{
setProperty("hibernate.hbm2ddl.auto",
env.getProperty("hibernate.hbm2ddl.auto"));
setProperty("hibernate.dialect",
env.getProperty("hibernate.dialect"));
setProperty("hibernate.globally_quoted_identifiers",
"true");
}
};
}
}
属性文件
# jdbc confi
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring_hibernate_dev?createDatabaseIfNotExist=true
jdbc.user=tutorialuser
jdbc.pass=tutorialmy5ql
# hibernate config
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
hibernate.show_sql=false
hibernate.hbm2ddl.auto=create-drop
然后您就可以在所需的类中访问Datasource或SessionFactory
public class HibernateDAO{
@Autowired
SessionFactory sessionFactory;
@Autowired
DataSource datasource;
}
以下是示例link