Hibernate 组合查询

 1 public List<Student> findByCondition(Student stu) {
 2     StringBuilder sb=new StringBuilder("from Student where 1=1");
 3     List<Object> params=new ArrayList<Object>();   //参数
 4     String sid=stu.getSid();
 5     if(sid!=null&&!sid.trim().isEmpty()){
 6         sb.append(" and sid like ?");
 7         params.add("%"+sid+"%");
 8     }
 9     
10     SimpleDateFormat sf=new SimpleDateFormat("yyyy-MM-dd");
11     Date  birthday=stu.getBirthday();
12     if(birthday!=null){
13         sb.append(" and birthday = ?");
14         params.add(birthday);
15     }
16     
17     String sql=sb.toString();
18     Query q = getCurrentSession().createQuery(sql);
19     if (params != null && !params.isEmpty()) {
20         for (int i=0;i<params.size();i++) {
21             q.setParameter(i, params.get(i));
22         }
23     }
24     return q.list();
25     
26     }