hibernate封装查询，筛选条件然后查询

    // 封装查询条件
 
    @Test
    public void transmitParameter() {
        Map map = new HashMap<String, String>();
        // map.put("sid", "1");
        map.put("s_name", "");
        test1(Student.class, map);
        // 可能会根据筛选来查询！有的条件可能值为空
    }
 
    public void test1(Class classs, Map<String, String> p) {
        Session session = startCfg.getSession();
        Transaction t = session.beginTransaction();
        // 拼接sql语句
        StringBuffer sb = new StringBuffer();
        sb.append("from "
                + session.getSessionFactory().getClassMetadata(classs)
                        .getEntityName() + " where 1=1 ");
        // 搜索哪些字段要根据map来添加
        for (Entry<String, String> entry : p.entrySet()) {
            if (!entry.getValue().equals("")) {
                sb.append(" and " + entry.getKey() + "=:" + entry.getKey());
            }
        }
 
        Query query = session.createQuery(sb.toString());
        for (Entry<String, String> entry : p.entrySet()) {
            if (!entry.getValue().equals("")) {
                query.setParameter(entry.getKey(), entry.getValue());
            }
        }
        List list = query.list();
        System.out.println(list.toString());
        t.commit();
 
    }