Haoqiang Lyu

Recently, I faced up a problem in my project. I tried to use generic type in my project, but when it came to the hibernate hql, I can not get the generic type. Following is the solution:

Let’s begin

Step 1:

Suppose I have a normal class like findById.

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@Override
    public User findById(Long id) {
        String hql = "FROM User u where u.id = :userId";
        Session s = sessionFactory.getCurrentSession();
        TypedQuery<User> query = s.createQuery(hql);
        query.setParameter("userId", id);
        return query.getSingleResult();
    }

之前一直用的是买的的VPN，价格基本都是几十块一个月不等，其实想自己搭VPN很久了，就是一直懒，哈哈哈哈，前阵子抽空用AWS的EC2搭了一套VPN，粗略的加速了下，测试下来速度比买的Justmysocks速度快了一倍，看个Youtube 1080p完全不卡，进度条随意拖动，教程如下。

注册AWS账号

首先要注册一个AWS的账号，英文不好的童鞋可以把语言切换成中文。至于需要填什么，自己打开来看吧，因为我的账号注册了很久了，已经忘记了，应该要绑定一张支持全币种的Visa卡，Amazon会进行信用卡验证，刷取1刀的预授权来验证信用卡是否有效，不过后续会在账单上退回，不必担心。

最近使用VPN科学上网时，导致了push到git的速度大幅减慢，最后还出现了push错误的情况，报错情况如下：

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