samueli的专栏

       为了在Struts中加载Spring context，需要在struts-config.xml文件中加入如下部分： <struts-config> <plug-in className="org.springframework.web.struts.ContextLoaderPlugIn"> <set-property pro...

1、只有两个层次时候的查询：      方法1-利用HQL查询： public class Pack { private String id; private Pack parentPack; public String getId() { return id; } public void setId(String id) { this.id = id; } public P...

如果我们在Hibernate中需要查询多个表的不同字段，如何来获取结果呢？ 有两种方式： 1、 对各个字段分别转化成对应类型，如下： Query q = session.createQuery(" select members, classInfo.className " + " from Members members, ClassInfo classInfo " + " where m...

How to solve the hibernate N+1 problem?     In hibernate, one-to-one relationship causes the N+1 problem.     for example a husband has a wife, and a wife has a husband. it's a typical example...