Java 在hibernate中更新对象

我正在使用Primefaces 3.5+hibernate 4.2.0

我正在使用primefaces中的，当我单击一个字段并更改我的表值时，我想在数据库中更新我的产品表。但是，我发现hibernate的简单属性的更新方法如下：

EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();

String jpqlUpdate = "update Customer set name = :newName where name = :oldName"
int updatedEntities = entityManager.createQuery( jpqlUpdate )
                            .setParameter( "newName", newName )
                            .setParameter( "oldName", oldName )
                            .executeUpdate();
entityManager.getTransaction().commit();
entityManager.close();

如何在hibernate中更新整个对象？

您可以尝试以下方法：

DataaccessClass:

public boolean update(YourClass yourObject) {
    Transaction transaction = null;
    boolean result = false;
    try {
        SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
        Session session = sessionFactory.getCurrentSession();
        transaction = session.beginTransaction();
        session.update(yourObject);
        transaction.commit();

        result = true;

    } catch (Exception ex) {
        ex.printStackTrace();
        if (transaction != null) {
            transaction.rollback();
        }
    }
    return result;
}
 public boolean update2(YourClass yourObject)  {
    Transaction transaction = null;
    int result = -1;
    try {
        String sqlQuery = "UPDATE YourTable SET yourColumn1=" + yourObject.value1
                + ", yourColumn2='" + yourObject.value2 + "' WHERE [some condition]=";
        SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
        Session session = sessionFactory.getCurrentSession();
        transaction = session.beginTransaction();
        SQLQuery query = session.createSQLQuery(sqlQuery);
        result = query.executeUpdate();
        transaction.commit();

    } catch (Exception ex) {
        ex.printStackTrace();
        if (transaction != null) {
            transaction.rollback();
        }
    }
    return result;
}

<hibernate-configuration>
<session-factory name="session">
    <property name="hibernate.connection.driver_class">[db_driver]</property>
    <property name="hibernate.connection.url">jdbc:[db_type]://[db_ip]:[db_port]/YourDatabase</property>
    <property name="hibernate.connection.username">username</property>
    <property name="hibernate.connection.password">password</property>
    <property name="hibernate.dialect">[db_dialect]</property>

    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.format_sql">false</property>
    <property name="hibernate.current_session_context_class">thread</property>

    <mapping class="dataaccess.entity.YourClass"/>

</session-factory>
</hibernate-configuration>  

Hibernate.cfg.xml

public boolean update(YourClass yourObject) {
    Transaction transaction = null;
    boolean result = false;
    try {
        SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
        Session session = sessionFactory.getCurrentSession();
        transaction = session.beginTransaction();
        session.update(yourObject);
        transaction.commit();

        result = true;

    } catch (Exception ex) {
        ex.printStackTrace();
        if (transaction != null) {
            transaction.rollback();
        }
    }
    return result;
}
 public boolean update2(YourClass yourObject)  {
    Transaction transaction = null;
    int result = -1;
    try {
        String sqlQuery = "UPDATE YourTable SET yourColumn1=" + yourObject.value1
                + ", yourColumn2='" + yourObject.value2 + "' WHERE [some condition]=";
        SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
        Session session = sessionFactory.getCurrentSession();
        transaction = session.beginTransaction();
        SQLQuery query = session.createSQLQuery(sqlQuery);
        result = query.executeUpdate();
        transaction.commit();

    } catch (Exception ex) {
        ex.printStackTrace();
        if (transaction != null) {
            transaction.rollback();
        }
    }
    return result;
}

<hibernate-configuration>
<session-factory name="session">
    <property name="hibernate.connection.driver_class">[db_driver]</property>
    <property name="hibernate.connection.url">jdbc:[db_type]://[db_ip]:[db_port]/YourDatabase</property>
    <property name="hibernate.connection.username">username</property>
    <property name="hibernate.connection.password">password</property>
    <property name="hibernate.dialect">[db_dialect]</property>

    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.format_sql">false</property>
    <property name="hibernate.current_session_context_class">thread</property>

    <mapping class="dataaccess.entity.YourClass"/>

</session-factory>
</hibernate-configuration>  

---

您可以看到这一点，因为是否有可能使用简单的

update

语句？您需要这样的内容：Transaction=null；String sqlQuery=“updateyourtable SET yourColumn1=“+yourValue1+”，yourColumn2=”“+yourValue2+”，WHERE someCondition”；SessionFactory SessionFactory=HibernateUtil.getSessionFactory（）；Session Session=sessionFactory.getCurrentSession（）；事务=session.beginTransaction（）；SQLQuery=session.createSQLQuery（SQLQuery）；结果=query.executeUpdate（）；commit（）；