spring整合hibernate

@Configuration
@PropertySource("classpath:/application.properties")
public class HibernateConf {
 //Enviroment对象可以取到被@PropertySource标记的文件数据
 //通过拿到properties文件中的属性来摆脱硬编码
 @Autowired
 public Environment env;

 
 //DataSource对象是用来配置连接数据库的信息
 //在稍后配置LocalSessionFactoryBean会用到datasource来连接数据库
 @Bean
 public DataSource dataSource() throws ClassNotFoundException{
  DataSource ds=new DataSource();
  //通过Environment对象再Properties文件中拿到配置信息
  ds.setUsername(env.getProperty("dataSource.username","root"));
  ds.setPassword(env.getProperty("dataSource.password","null"));
  ds.setAddress(env.getProperty("dataSource.address"));
  ds.setDriver(env.getProperty("dataSource.driver"));
  return ds;
 }
 
 //LocalSessionFactoryBean同SessionBean
 //用来配置hibernate
 @Bean
 @Autowired
 public LocalSessionFactoryBean sessionFactory(DataSource dataSource){
  LocalSessionFactoryBean sessionFactory=new LocalSessionFactoryBean();
  sessionFactory.setDataSource(dataSource);
  //设置扫描orm对象锁崽的包
  sessionFactory.setPackagesToScan("weibo.po");
  Properties prop=new Properties();
  prop.setProperty("hibernate.dialect",env.getProperty("hibernate.dialect"));//设置hibernate方言
  prop.setProperty("hibernate.show_sql", env.getProperty("hibernate.show_sql"));//设置显示sql
  prop.setProperty("hibernate.format_sql",env.getProperty("hibernate.format_sql"));//格式化sql
  prop.setProperty("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));//自动建表
  sessionFactory.setHibernateProperties(prop);
  return sessionFactory;
 }

 //session
 @Bean
 //request作用域+通过类实现代理
 @Scope(scopeName=WebApplicationContext.SCOPE_REQUEST,proxyMode=ScopedProxyMode.TARGET_CLASS)
 //自动装配已经装配好的SessionFactory
 @Autowired
 public Session session(SessionFactory sessionFactory){
   return sessionFactory.openSession();
 }
 
 //transaction
 @Bean
 @Scope(scopeName=WebApplicationContext.SCOPE_REQUEST,proxyMode=ScopedProxyMode.TARGET_CLASS)
 //自动装配已经装配好的Session
 @Autowired
 public Transaction transction(Session session){
   return session.beginTransaction();
 }

 public void crud() throws SQLException{
  try{
    //操作数据库的代码
    transaction.submit();//提交
  }catch(SQLException e){
    transaction.rollback();//回滚
    throw e;
  }finally{
    session.close();//关闭连接
  }
 }

//声明切面
@Aspect
public class DAOAspect {
 //自动装配session和transcation
 @Autowired
 private Session session;
 @Autowired
 private Transaction transaction;
 //声明切点
 @Pointcut("execution(* *.dao.*.crud(*))")//这样子所有dao包下的crud方法都会被标记为切点
 public void crud(){}
 
 //在crud地方环绕通知
 @Around("crud()")
 public void aroundCrud(ProceedingJoinPoint p) throws Throwable{
   try{
     p.proceed();//执行crud动作
     transaction.commit();//提交事务
   }catch(Throwable e){
     transaction.rollback();//出错回滚
     throw e;
   }finally{
     session.close();//关闭连接
   }
 }
}