action写出dao,servlet

Question

这个action只是向数据库save一条纪录。
通过这个action写出[color=#FF0000]dao实现,service实现？复制代码就可以了，也不用写[/color]
我是分不清哪些是dao实现里的，哪些是service实现里的？
public class AddTopicAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException {

request.setCharacterEncoding("utf-8");

String topic=request.getParameter("topic");
String topiccontent=request.getParameter("topiccontent");
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String releasetime=sdf.format(new Date());
int userid=Integer.parseInt(request.getParameter("userid"));

Bbstopic bt=new Bbstopic();
bt.setTopic(topic);
bt.setTopiccontent(topiccontent);
bt.setReleasetime(releasetime);
bt.setBbsusers((Bbsusers)session.load(Bbsusers.class, userid));  //外键字段

Session session=HibernateSessionFactory.getSession();
session.beginTransaction();
session.save(bt);
session.getTransaction().commit();
session.close();

return mapping.findForward("addTopicSuccess");
}
}
po类:Bbstopic.java
public class Bbstopic implements java.io.Serializable { private Integer topicid;
private Bbsusers bbsusers;
private String topic;
private String topiccontent;
private String releasetime;
private Set bbsreplies = new HashSet(0);
        .......get,set方法就不写了.

Answer 1

通过这个action写出dao实现,service实现？复制代码就可以了，也不用写

Answer 2

操作数据库的代码写到dao里，涉及业务的代码写到service里
也就是action调用service，service里调用dao

Answer 3

下面这些代码是写在service实现里，还是写在action里封装好再传给service实现？？？？？？Bbstopic bt=new Bbstopic(); 
bt.setTopic(topic); 
bt.setTopiccontent(topiccontent); 
bt.setReleasetime(releasetime); 
bt.setBbsusers((Bbsusers)session.load(Bbsusers.class, userid));  

Answer 4

Session session=HibernateSessionFactory.getSession(); 
session.beginTransaction(); 
session.save(bt); 
session.getTransaction().commit(); 
session.close(); 
写到DAO里，
String topic=request.getParameter("topic"); 
String topiccontent=request.getParameter("topiccontent"); 
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
String releasetime=sdf.format(new Date()); 
int userid=Integer.parseInt(request.getParameter("userid")); Bbstopic bt=new Bbstopic(); 
bt.setTopic(topic); 
bt.setTopiccontent(topiccontent); 
bt.setReleasetime(releasetime); 
bt.setBbsusers((Bbsusers)session.load(Bbsusers.class, userid)); 
写到service里

Answer 5

开始有点明白了，不过参数还不知道怎么传到service，我回去试试先

Answer 6

action里面的
--------------------------------------------
public class AddTopicAction extends Action { 
public ActionForward execute(ActionMapping mapping, ActionForm form, 
HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { request.setCharacterEncoding("utf-8"); String topic=request.getParameter("topic"); 
String topiccontent=request.getParameter("topiccontent"); 
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
String releasetime=sdf.format(new Date()); 
int userid=Integer.parseInt(request.getParameter("userid")); Bbstopic bt=new Bbstopic(); 
bt.setTopic(topic); 
bt.setTopiccontent(topiccontent); 
bt.setReleasetime(releasetime); 
bt.setBbsusers((Bbsusers)session.load(Bbsusers.class, userid)); 
----------------------------------------
DAO层里的
------------------------------------------
Session session=HibernateSessionFactory.getSession(); 
session.beginTransaction(); 
session.save(bt); 
session.getTransaction().commit(); 
session.close(); return mapping.findForward("addTopicSuccess"); 
} 
}