细节决定成败--hibernate的cfg文件

<?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>

        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jbdc:mysql://localhost:3306/helloworld</property>//错误点在这里“jdbc”
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>

        <property name="show_sql">true</property>
        <property name="format_sql">true</property>  
        <mapping resource="com/hibernate/bean/Student.hbm.xml"/>

    </session-factory>

-->

   <session-factory>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        
        <property name="connection.username">root</property>
        
        <property name="connection.password">root</property>
        
        <property name="connection.url">jdbc:mysql://localhost:3306/helloworld</property>
        
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        
        <property name="show_sql">true</property>
        
        <property name="hibernate.format_sql">true</property>
        
        <mapping resource="com/hibernate/bean/Student.hbm.xml"></mapping>
        
        
   </session-factory>
</hibernate-configuration>

注意一些细节问题，坑了我好久这个问题。