hibernate连接sqlserver2008的

异常信息如下：
Exception in thread "main" org.hibernate.exception.JDBCConnectionException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:97)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1354)
at jyu.hibernate.model.StudentTest.main(StudentTest.java:17)
Caused by: java.sql.SQLException: No suitable driver found for jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=用户管理
at java.sql.DriverManager.getConnection(DriverManager.java:604)
at java.sql.DriverManager.getConnection(DriverManager.java:190)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
... 5 more
hibernate的配置信息<?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>
    <!-- Database connection settings -->
    <!-- 
        <property name="connection.driver_class">
         com.mysql.jdbc.Driver
        </property>   
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
     -->
     
    <property name="hibernate.dialect">
org.hibernate.dialect.SQLServerDialect
    </property>
     <property name="hibernate.connection.driver_class">
     com.microsoft.sqlserver.jdbc.SQLServerDriver
     </property> 
        <property name="connection.url">
         jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=用户管理
        </property>
        <property name="connection.username">sa</property>
        <property name="connection.password">123</property>
        
        <!-- JDBC connection pool (use the built-in)
         <property name="connection.pool_size">1</property>
        -->
          
        <!-- Enable Hibernate's automatic session context management         
         <property name="current_session_context_class">thread</property>
            -->
                
        <!-- Disable the second-level cache  -->
        <!--
        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
        -->
        
        <!-- Echo all executed SQL to stdout -->
         <property name="show_sql">true</property> 
         <!-- Drop and re-create the database schema on startup
          <property name="hbm2ddl.auto">update</property>
         -->
         
         <mapping resource="Student.hbm.xml" />
    </session-factory>
 </hibernate-configuration>