hibernate 中的错误：Caused by: java.lang.ClassNotFoundException: net.sourceforge.jtds

Question

小弟初学hibernate遇到一棘手错误望高手指教。
1.这是错误：
Exception in thread "main" org.hibernate.HibernateException: JDBC Driver class not found: net.sourceforge.jtds.jdbc.Driver
at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:89)
at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:137)
at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:79)
at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:425)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:89)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2119)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2115)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1339)
at StudentTest.main(StudentTest.java:12)
Caused by: java.lang.ClassNotFoundException: net.sourceforge.jtds.jdbc.Driver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192)
at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:84)
... 8 more
2.这是hibernate.cfg.xml文件：
<?xml version='1.0' encoding='GBK'?>
<!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.microsoft.jdbc.sqlserver.SQLServerDriver</property>        
        <property name="connection.url">jdbc:microsoft:sqlserver://localhost:1433; DatabaseName=student</property>
       -->
         
         <property name="connection.driver_class">net.sourceforge.jtds.jdbc.Driver</property>
         <property name="connection.url">jdbc:jtds:sqlserver://127.0.0.1:1433;DatabaseName=student</property>
       
        <property name="connection.username">sa</property>
        <property name="connection.password">sa</property>        <!-- JDBC connection pool (use the built-in) -->
        <!-- 
         <property name="connection.pool_size">1</property>
         -->        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.SQLServerDialect</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.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="com/wsp/hibernate/model/Student.hbm.xml"/>    </session-factory></hibernate-configuration>3.这是Student.hbm.xml
<?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 package="com.wsp.hibernate.model">
<class name="com.wsp.hibernate.model.Student" table="student">
<id name="studentId"></id>
<property name="studentName"></property>
<property name="studentAge"></property>
</class></hibernate-mapping>4.这里是javaBeanpackage com.wsp.hibernate.model;public class Student {
private int studentId;
private String studentName;
private int studentAge;

public int getStudentId() {
return studentId;
}
public void setStudentId(int studentId) {
this.studentId = studentId;
}
public String getStudentName() {
return studentName;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public int getStudentAge() {
return studentAge;
}
public void setStudentAge(int studentAge) {
this.studentAge = studentAge;
}

}
5.这是StudentTest页面import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import com.wsp.hibernate.model.Student;
public class StudentTest {
public static void main(String [] args){
Student s=new Student();
s.setStudentId(1);
s.setStudentName("wsp");
s.setStudentAge(23);
Configuration cfg=new Configuration();
SessionFactory sf=cfg.configure().buildSessionFactory();
Session session=sf.openSession();
session.beginTransaction();
session.save(s);
session.getTransaction().commit();
session.close();
sf.close();
}
}

Answer 1

这错误这么大：
Exception in thread "main" org.hibernate.HibernateException: JDBC Driver class not found: net.sourceforge.jtds.jdbc.Driver   要学会看错误消息，因为初学不懂的话，可以把这错误消息粘贴到百度上，搜下！

Answer 2

JDBC Driver class not found   

Answer 3

没找到包  只要是 class not found 的 异常都是包没有

Answer 4

没有导入jdbc的jar包啊！！！！！两外，hibernate配置文件是不是没对应到表的字段？？？？？