//创建匿名用户
User anonymous = dao.findOne(User.class, new BasicDBObject("provider", "anonymous"));
if (anonymous == null) {
anonymous = new User();
anonymous.setProvider("anonymous");
dao.save(anonymous);
}
//创建超级用户
User root = dao.findOne(User.class, new BasicDBObject("provider", "root"));
if (root == null) {