关于 hibernate-spring-dao 的问题

发布于 2024-08-23 18:43:14 字数 1030 浏览 2 评论 0原文

我有一个 DAO 类，我用它来尝试使用 hibernate 和 Mysql 数据库进行选择/更新/插入。我现在正在为这些编写方法，我已经编写了这样的插入：

public Long save(People transientInstance) {
        log.debug("Saving People instance");
        try {
            Long id = (Long)getHibernateTemplate().save(transientInstance);
            log.debug("save successful with id #" + id);
            return id;
        } catch (RuntimeException re) {
            log.error("save failed", re);
            throw re;
        }
    }

我有 3 列，一列是 id，第二列是 name，第三列是 surname 。使用相同的逻辑，我如何通过 ID 获取人员或更新人员。现在我也可以写删除：

public void delete(People persistentInstance) {
        log.debug("deleting People instance");
        try {
            getHibernateTemplate().delete(persistentInstance);
            log.debug("delete successful");
        } catch (RuntimeException re) {
            log.error("delete failed", re);
            throw re;
        }
    }

如果我可以通过 ID 获取 People 对象，我可以删除或更新，但我不知道如何。谢谢（是的，我正在努力学习java-spring-hibernate，请对我轻松点）

原文

I have a DAO class which I'm using to try select/update/insert with hibernate and Mysql database. I'm writing methods for these now, I already wrote insert like this :

public Long save(People transientInstance) {
        log.debug("Saving People instance");
        try {
            Long id = (Long)getHibernateTemplate().save(transientInstance);
            log.debug("save successful with id #" + id);
            return id;
        } catch (RuntimeException re) {
            log.error("save failed", re);
            throw re;
        }
    }

I have a 3 columns, one is id, second is name, third is surname. Using the same logic how can I get person by ID or update person. Now I can wrote delete also :

public void delete(People persistentInstance) {
        log.debug("deleting People instance");
        try {
            getHibernateTemplate().delete(persistentInstance);
            log.debug("delete successful");
        } catch (RuntimeException re) {
            log.error("delete failed", re);
            throw re;
        }
    }

I could delete or update if I could get the People object by ID but I don't know how. Thank you( yes I'm trying to learn java-spring-hibernate go easy on me pls)

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神回复 2024-08-30 18:43:14

听起来你想做这样的事情：

public void updatePeople(Long id, String surname) {
    People p = getHibernateTemplate().get(People.class, id)
    p.setSurname(surname);
    getHibernateTemplate().update(p);
}

It sounds like you want to do something like this:

public void updatePeople(Long id, String surname) {
    People p = getHibernateTemplate().get(People.class, id)
    p.setSurname(surname);
    getHibernateTemplate().update(p);
}

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