Generic DAO 介绍
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);
}
}
...
}
Generic DAO 官网
http://code.google.com/p/genericdao/
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