org.hibernate.exception.JDBCConnectionException: Error calling DriverManager#getConnection

at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:132)

at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator$1$1.convert(BasicConnectionCreator.java:118)

这是我的hibernate.cfg.xml代码：

<?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="connection.username">root</property>

<property name="connection.password"></property>

<property name="connection.driver.class">com.mysql.jdbc.Driver</property>

<property name="connection.url"><![CDATA[jdbc:mysql://127.0.0.1:3306/hibernate?useUnicode=true&characterEncoding=UTF-8]]></property>

<property name="dialect">org.hibernate.dialect.MySQLDialect</property>

<property name="show_sql">true</property>

<property name="format_sql">true</property>

<property name="hbm2ddl.auto">create</property>

<mapping resource="Students.hbm.xml" />

</session-factory>

</hibernate-configuration>