Hibernate cfg文件

Question

我是java和hibernate框架的新手，你能向我解释一下，如果我必须为我拥有的每个表都创建一个Hibernate cfg文件，还是只需要这样就足够了。现在我有了一个person表，现在如果我还想使用一个新表(在我的例子中是exam)，我是否需要编写一个新文件并更改映射？

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC 
"-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3310/scheduler</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password">blanked-out-as-this-is-s3cr3t</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="show_sql">true</property>
        <property name="hbm2ddl.auto">update</property>
        <mapping class="com.scheduler.backend.model.Person"></mapping>
    </session-factory>
</hibernate-configuration>

Answer 1

您只需要一个 cfg文件，如果您需要添加一个新表，只需将其发布为

<mapping class="com.scheduler.backend.model.NEW_MODEL"></mapping>

所以这个文件是这样的：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC 
"-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3310/scheduler</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password">blanked-out-as-this-is-s3cr3t</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="show_sql">true</property>
        <property name="hbm2ddl.auto">update</property>
        <mapping class="com.scheduler.backend.model.Person"></mapping>
        <mapping class="com.scheduler.backend.model.NEW_ONE"></mapping>
        <mapping class="com.scheduler.backend.model.NEW_ONE"></mapping>
    </session-factory>
</hibernate-configuration>