为什么我发帖总没人回复啊！！！
运行程序的结果是：Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not insert: [lee.News]；
Caused by: java.sql.SQLException: Table 'hibernates.news_table' doesn't exist
奇怪的是数据没有插入成功，反而自动把表给删除了。。。。
纠结了好长时间，请懂的朋友支援，谢谢！！

mysql:
 create table news_table (
 news_id int primary key auto_increment,
 news_title varchar(20) not null,
 content varchar(50) not null );

News.java :  
package lee;
public class News {
  private Integer id;
  private String title;
  private String content;
   
  public News() {}
  public News(Integer id, String title, String content) {
  this.setId(id);
  this.setTitle(title);
  this.setContent(content);
  }

  public Integer getId() {
  return id;
  }
  public void setId(Integer id) {
  this.id = id;
  }
  public String getTitle() {
  return title;
  }
  public void setTitle(String title) {
  this.title = title;
  }
  public String getContent() {
  return content;
  }
  public void setContent(String content) {
  this.content = content;
  }
}

Test.java :  
package lee;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class Test {
  public static void main(String[] args) throws Exception
  {
  //实例化Configuration
  Configuration conf = new Configuration().configure();
  //实例化SessionFactory
  SessionFactory sf = conf.buildSessionFactory();
  //实例化Session
  Session sess = sf.openSession();
  //开始事务
  Transaction tx = sess.beginTransaction();
  //创建消息实例
  News n = new News();
  //设置消息标题和消息内容
  n.setTitle("疯狂Java联盟成立了");
  n.setContent("疯狂Java联盟成立了，网址是www.crazyit.org");
  //保存消息
  sess.save(n);
  //提交事务
  tx.commit();
  //关闭Session
  sess.close();
  }
}

News.hbm.xml :  
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
  "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
  "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="lee">
  <!-- 每个class元素对应一个持久化对象 -->
  <class name="News" table="news_table">
  <!-- id元素定义持久化类的标识属性 -->
  <id name="id" column="news_id" unsaved-value="null">
  <generator class="identity"/>
  </id>
  <!-- property元素定义常规属性 -->
  <property name="title" column="news_title" type="string"/>
  <property name="content" type="string"/>
  </class>
</hibernate-mapping>

hibernate.cfg.xml :  
<?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>
  <!-- 指定连接数据库所用的驱动 -->
  <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
  <!-- 指定连接数据库的url，hibernate是连接的数据库名 -->
  <property name="connection.url">jdbc:mysql://localhost/hibernates</property>