HQL查询语句

先来一个简单的示例

    /**
     * 根据姓名查询用户
     * @param name 姓名
     * @return 用户对象
     */
    public User getUserBynName(String name){
        User user = null;
        Session session = null;
        try {
            session = HibernateUtils.getSession();
            String hql = " FROM User as user WHERE user.name = :name ";
            Query query = session.createQuery(hql);
            query.setString("name",name);
            user = (User) query.uniqueResult();
        }finally {
            if (session != null){
                session.close();
            }
        }
        return user;
    }

11             String hql = " FROM User as user WHERE user.name = ?";
12             Query query = session.createQuery(hql);
13             query.setString(1,name);

这样也行，但不推荐。注意，索引从1开始

---

    public List<User> getUsersByName(String name){
        List<User> users = null;
        Session session = null;
        try {
            session = HibernateUtils.getSession();
            /*这里查的是User对象，不是user表，支持多态*/
            String hql = " FROM User as user WHERE user.name LIKE :name ";
            Query query = session.createQuery(hql);
            query.setString("name",name+"%");
            users = query.list();
        }finally {
            if (session != null){
                session.close();
            }
        }
        return users;
    }

分页查询

    public List<User> getUsersByName(String name){
        List<User> users = null;
        Session session = null;
        try {
            session = HibernateUtils.getSession();
            /*这里查的是User对象，不是user表，支持多态*/
            String hql = " FROM User as user WHERE user.name LIKE :name ";
            Query query = session.createQuery(hql);
            query.setString("name",name+"%");
            query.setFirstResult(10);
            query.setMaxResults(5);
            users = query.list();
        }finally {
            if (session != null){
                session.close();
            }
        }
        return users;
    }