今天下午学习使用hibernate，跟着视频做，可是控制台老报这个错误
02:03:12,171 WARN UserSuppliedConnectionProvider:23 - No connection properties specified - the user must supply JDBC connections
02:03:12,171 ERROR SchemaExport:202 - schema export unsuccessful
java.lang.UnsupportedOperationException: The user must supply a JDBC connection
at org.hibernate.connection.UserSuppliedConnectionProvider.getConnection(UserSuppliedConnectionProvider.java:30)
at org.hibernate.tool.hbm2ddl.ManagedProviderConnectionHelper.prepare(ManagedProviderConnectionHelper.java:28)
at org.hibernate.tool.hbm2ddl.SchemaExport.execute(SchemaExport.java:180)
at org.hibernate.tool.hbm2ddl.SchemaExport.create(SchemaExport.java:133)
at com.test.hibernate.ExportDB.main(ExportDB.java:15)
视频就能运行成功，我的就不行，很是郁闷，
hibernate.cfg.xml配置如下：
<!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.url ">jdbc:mysql:///localhost/hibernate_first</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<mapping resource="com/test/hibernate/User.hbm.xml"/>
</session-factory>
</hibernate-configuration>
实体类User的映射文件配置：
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.test.hibernate.User">
<id name="id">
<generator class="uuid"/>
</id>
<property name="userName"/>
<property name="password"/>
<property name="createDate"/>
<property name="expireDate"/>
</class>
</hibernate-mapping>
下面是连接数据库的类：
package com.test.hibernate;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
public class ExportDB {
public static void main(String[] args) {
Configuration cfg = new Configuration().configure();
SchemaExport export = new SchemaExport(cfg);
export.create(true, true);
}
}
希望路过高手不吝指导一下，感激不尽！！！！