如题，我在阿里云上开了一个数据库RDS，在本地开发时配置Hibernate如下：
<!-- 数据库连接设置 -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<!-- 技术：数据库类型：服务器ip/数据库名 -->
<property name="connection.url">jdbc:mysql://我的服务器ip地址:3001/mywebset</property>
<property name="connection.username">root</property>
<property name="connection.password">Li774717903</property>
<!-- 配置dialect方言，明确告诉hibernate连接的是哪种数据库 -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
端口、数据库名、用户名、密码都是正确的，但是在访问数据库时报错，错误发生在我的HibernateUtil类中：
HibernateUtil() {
sessionFactory = new Configuration().configure().buildSessionFactory();//此处报错
System.out.println("HibernateUtil : 连接成功");
}
我想知道连接网络上的数据库需要怎样配置？
部分错误信息如下：
Type Exception Report
Message Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:267)
org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:231)
org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:210)
org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:51)
org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:94)
org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:240)
org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:210)
org.hibernate.boot.model.process.spi.MetadataBuildingProcess.handleTypes(MetadataBuildingProcess.java:352)
org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:111)
org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:83)
org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:418)
org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:87)
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:691)
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:726)
com.hibernate.dao.HibernateUtil.<init>(HibernateUtil.java:13)
com.hibernate.dao.MusicDao.getAll(MusicDao.java:61)
com.struts.action.IndexAction.toMusic(IndexAction.java:36)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:450)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:289)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:252)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
