hibernate自带统计类

hibernate自带统计类
用于统计的类主要是位于：org.hibernate.stat包中
如：org.hibernate.stat.EntityStatistics，org.hibernate.stat.QueryStatistics
org.hibernate.stat.CollectionStatistics
org.hibernate.stat.SecondLevelCacheStatistics
由名字不难看出这些类的用处了

应用举例：spring+hibernate

  if(sessionFactory == null) {
    WebApplicationContext applicationContext =   WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());
    sessionFactory = (SessionFactory)applicationContext.getBean("sessionFactory");
  }
  Statistics statistics = sessionFactory.getStatistics();
  //统计entity信息
  for(int i=0; i<statistics.getEntityNames().length; i++) {
    String entityName = statistics.getEntityNames()[i];
    EntityStatistics entityStatistics = statistics.getEntityStatistics(entityName);
//下面可以处理每个具体entity的信息了