软件简介

Generic DAO 是一个 Java 的轻量级 ORM 框架，允许开发者为持久化对象编写 DAO 类。

示例代码：

public class BlogLogicImpl implements BlogLogic {

   private BlogWowDaoImpl dao;  
   public void setDao(BlogWowDaoImpl dao) {  
      this.dao = dao;  
   }

   public BlogWowBlog getBlogByLocationAndUser(String locationId, String userId) {  
      List<BlogWowBlog> l = dao.findBySearch(BlogWowBlog.class, new Search("location", locationId) );

      if (l.size() <= 0) {  
         // no blog found, create a new one  
         if (canWriteBlog(null, locationId, userId)) {  
            BlogWowBlog blog = new BlogWowBlog(userId, locationId, "Initial title", new Date());  
            dao.save(blog);  
            return blog;  
         }  
         return null;  
      } else if (l.size() >= 1) {  
         // found existing blog  
         return (BlogWowBlog) l.get(0);  
      }  
   }  
...  
}