求助，新手学hibernate4.1.4遇到问题
最近学习hibernate，第一个例子就出问题了，解决了几个，有出现一个新的，这个没找到方法解决，所以来求助各位前辈！
hibernate.cfg.xml的配置如下：
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost/hibernate</property>
<property name="connection.username">root</property>
<property name="connection.password">mysql</property>
<!-- JDBC connection pool (use the built-in) -->
<!--<property name="connection.pool_size">1</property>-->
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</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="com/dxd/hibernate/model/Student.hbm.xml"/>-->
<mapping class="com.dxd.hibernate.model.Student"/>
</session-factory>
</hibernate-configuration>
Student.java如下：
package com.dxd.hibernate.model;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Student {
private int id;
private String name;
private int age;
@Id
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
测试类StudentTest.java如下：
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistryBuilder;
import com.dxd.hibernate.model.Student;
public class StudentTest {
public static void main(String[] args) {
Student student=new Student();
student.setId(1);
student.setName("nihao");
student.setAge(20);
Configuration cfg=new Configuration();
SessionFactory sf=cfg.configure().buildSessionFactory(new ServiceRegistryBuilder().buildServiceRegistry()); //这是第16行
Session session=sf.openSession();
session.beginTransaction();
session.save(student);
session.getTransaction().commit();
session.close();
sf.close();
}
}
另外因为之前出现过问题，加了一个hibernate.properties文件，
hibernate.connection.driver_class=com.mysql.jdbc.Driver
hibernate.connection.password=mysql
hibernate.connection.url=jdbc:mysql://localhost/hibernate
hibernate.connection.username=root
hibernate.dialect=org.hibernate.dialect.MySQLDialect
出现的错误信息如下：
2012-6-18 15:19:03 org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final}
2012-6-18 15:19:03 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.1.4.Final}
2012-6-18 15:19:03 org.hibernate.cfg.Environment <clinit>
INFO: HHH000205: Loaded properties from resource hibernate.properties: {hibernate.connection.username=root, hibernate.connection.password=****, hibernate.dialect=org.hibernate.dialect.MySQLDialect, hibernate.connection.url=jdbc:mysql://localhost/hibernate, hibernate.bytecode.use_reflection_optimizer=false, hibernate.connection.driver_class=com.mysql.jdbc.Driver}
2012-6-18 15:19:03 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
2012-6-18 15:19:03 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
2012-6-18 15:19:03 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
2012-6-18 15:19:03 org.hibernate.cfg.Configuration doConfigure
INFO: HHH000041: Configured SessionFactory: null
2012-6-18 15:19:03 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000402: Using Hibernate built-in connection pool (not for production use!)
Exception in thread "main" [color=#333399]org.hibernate.service.classloading.spi.ClassLoadingException: Specified JDBC Driver com.mysql.jdbc.Driver class not found
at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:107)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:223)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:89)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2277)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2273)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1742)
at StudentTest.main(StudentTest.java:16)
Caused by: org.hibernate.service.classloading.spi.ClassLoadingException: Unable to load class [com.mysql.jdbc.Driver]
at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:141)
at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:104)
... 13 more
Caused by: java.lang.ClassNotFoundException: Could not load requested class : com.mysql.jdbc.Driver
at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl$1.findClass(ClassLoaderServiceImpl.java:99)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:138)
... 14 more[/color]
[解决办法]
少mysql驱动jar包，你找一下对应的驱动Jar包，build一下就可以了！
[解决办法]
Caused by: java.lang.ClassNotFoundException: Could not load requested class : com.mysql.jdbc.Driver
提示找不到驱动,说明你的项目中缺少mysql的JDBC驱动包,加进去就好了
[解决办法]
jar包你加在哪里了
[解决办法]
build path
