Java 使用Hibernate从数据库检索数据时发生映射错误

我拥有以下实体类别：

@Entity
@Table(name="TB_CUSTOMER")
public class Customer 
{
....

我还有以下hibernate.cfg.xml：

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <!-- Database connection settings -->
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="connection.url">jdbc:oracle:thin:@**:**:**</property>
        <property name="connection.username">***</property>
        <property name="connection.password">***</property>
        <property name="hibernate.connection.pool_size">20</property>
        <property name="hibernate.hbm2ddl.auto">update</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>

        <!-- Echo all executed SQL to log -->
        <property name="show_sql">false</property>

        <mapping class="the.path.of.entity.class.Customer"/>

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

如果我将findAll方法更改为：

List<Customer> customers = (List<Customer>)this.getCurrentSession().createCriteria(Customer.class).list();
return customers;

List customers=（List）this.getCurrentSession（）.createCriteria（Customer.class）.List（）；
返回客户；

然后我只得到一张空名单

有人能帮忙吗

也许会话被破坏了

---

谢谢。

将您的主页更改为：

customerDao.openCurrentSession().beginTransaction();
List<Customer> customers = customerDao.findAll();
customerDao.closeCurrentSession();

还要检查映射信息，并在映射中添加Customer类的完全限定名。作为：

<mapping class="package_name.Customer"/>

关于：Query Query=this.getCurrentSession（）.createQuery（“来自客户C”）；我仍然收到“Customer is not mapped”（客户未映射）异常。我尝试将@name注释中的表名替换为Cusomer，因此名称将相同，但不起作用。这张桌子看起来不错。

List<Customer> customers = (List<Customer>)this.getCurrentSession().createCriteria(Customer.class).list();
return customers;

customerDao.openCurrentSession().beginTransaction();
List<Customer> customers = customerDao.findAll();
customerDao.closeCurrentSession();

List<Customer> customers =this.getCurrentSession().createCriteria(Customer.class).list();

Query query = this.getCurrentSession().createQuery("from Customer C");

<mapping class="package_name.Customer"/>