Hibernate 查询方法

 1 1、简单查询：
 2  public User select(User user) {
 3         User newUser;
 4         try {
 5             newUser = (User) session.get(User.class,user.getEmails());
 6             return newUser;
 7         } catch (Exception e) {
 8             log.error("查询失败", e);
 9             return null;
10         } finally {
11             HibernateUtil.closeSession();
12         }
13     }
14 2、 用?：
15  public List<User>select(User user){
16   String hql = "from user where emails= ? and password= ?";
17   Query query = session.createQuery(hql);
18   query.setString(0, user.getEmails());
19   query.setString(1, user.getPassword());
20   List<User> list = query.list();
21   session.close();
22   return list;
23  }
24
25 3、用":+命名":
26  public List<User> select(User user){
27   Session session = HibernateSessionFactory.getSession();
28   String hql = "from user where emails= :e and password= :p";
29   Query query = session.createQuery(hql);
30 {
31   query.setString("e", user.getEmails());
32   query.setString("p", user.getPassword());
33 }else{
34  query.setParameter("e", user.getEmails());
35   query.setParameter("p", user.getPassword());
36 }else{
37  query.setProperties(user);
38 }
39   List<User> list = query.list();
40   session.close();
41   return list;
42  }
43 4、使用条件查询(Criteria) 没有hql语句 :
44  public List<User> select(User user){
45   Criteria cri = session.createCriteria(User.class);
46   cri.add(Restrictions.eq("emails", user.getEmails()));
47   cri.add(Restrictions.eq("password", user.getPassword()));
48   List<User> list = cri.list();
49   session.close();
50   return list;
51  }
52
53
54 5、离线条件查询:
55  public List<User> select(User user){
56   DetachedCriteria dc = DetachedCriteria.forClass(User.class);
57   dc .add(Restrictions.eq("emails", user.getEmails()));
58   dc .add(Restrictions.eq("password", user.getPassword()));
59   Criteria cri = dc.getExecutableCriteria(session);
60   List<User> list = cri.list();
61   session.close();
62   return list;
63  }
64 6、分页查询:
65 1)  setFirstResult(int):指定从指定的位置开始查询
66 2)  setMaxResult(int):指定一次查询的对象数量。