Hibernate正向工程(实体类-->数据库)

1,新建实体类News.java

 package com.hanqi.dao;

 import java.util.Date;

 public class News {

     private Integer id;
     private String title;
     private String contant;
     private Date createdate;

     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 getContant() {
         return contant;
     }
     public void setContant(String contant) {
         this.contant = contant;
     }

     /**
      * @return the createdate
      */
     public Date getCreatedate() {
         return createdate;
     }
     /**
      * @param createdate the createdate to set
      */
     public void setCreatedate(Date createdate) {
         this.createdate = createdate;
     }
     @Override
     public String toString() {
         return "News [id=" + id + ", title=" + title + ", contant=" + contant + ", createdate=" + createdate + "]";
     }
 }

2,利用hibernate生成实体类对应的配置文件,(右键-新建-其他-hbm.xml)News.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">
 <!-- Generated 2016-1-12 23:36:52 by Hibernate Tools 3.4.0.CR1 -->
 <hibernate-mapping>
     <class name="com.hanqi.dao.News" table="NEWS">
         <id name="id" type="java.lang.Integer">
             <column name="ID" />
             <generator class="native" /><!-- 注意此处主键生成方法常用native -->
         </id>
         <property name="title" type="java.lang.String">
             <column name="TITLE" />
         </property>
         <property name="contant" type="java.lang.String">
             <column name="CONTANT" />
         </property>
         <property name="createdate" type="java.util.Date">
             <column name="CREATEDATE" />
         </property>
     </class>
 </hibernate-mapping>

3,将hbm.xml添加到hibernate配置文件hibernate.cfg.xml中

 <?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>

         <property name="hibernate.bytecode.use_reflection_optimizer">false</property>
         <!-- 数据库连接 -->
         <property name="hibernate.connection.driver_class">oracle.jdbc.OracleDriver</property>
         <property name="hibernate.connection.password">test</property>
         <property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>
         <property name="hibernate.connection.username">test</property>
         <!-- 用户方案 -->
         <property name="hibernate.default_schema">TEST</property>
         <!-- 数据库方言 -->
         <property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
         <!-- sql语句/调试 -->
         <property name="hibernate.show_sql">true</property>
         <property name="hibernate.format_sql">true</property>
          <!--  自动建表方式 -->
         <property name="hibernate.hbm2ddl.auto">update</property>

         <property name="hibernate.search.autoregister_listeners">false</property>
         <property name="hibernate.validator.apply_to_ddl">false</property>
         <!-- 映射文件 -->
         <mapping resource="com/hanqi/dao/News.hbm.xml" />

     </session-factory>
 </hibernate-configuration>

4,新建JUnit Test Case类TestNews.java进行测试

 package com.hanqi.dao;

 import static org.junit.Assert.*;

 import java.util.Date;

 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
 import org.hibernate.Transaction;
 import org.hibernate.boot.registry.StandardServiceRegistry;
 import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
 import org.hibernate.cfg.Configuration;
 import org.junit.Test;
 import org.hibernate.service.*;

 public class TestNews {

     @Test
     public void test() {
         System.out.println("测试");
         //1-构建配置类
         Configuration cfgrn = new Configuration().configure();

         //2-构建配置工厂类
         ServiceRegistry srg = new StandardServiceRegistryBuilder().
                 applySettings(cfgrn.getProperties()).build();

         //3-构建会话工厂对象,比较耗资源
         SessionFactory sf = cfgrn.buildSessionFactory(srg);

         //4-构建会话对象
         Session se = sf.openSession();

         //5-开始事务
         Transaction tr = se.beginTransaction();

         //6-执行操作
 /*        News news = new News();

         news.setTitle("标题");
         news.setContant("这是内容");
         news.setCreatedate(new Date());

         se.save(news);//插入
 */
         News news2 = (News)se.get(News.class, 1);

         System.out.println(news2);//查询输出

         //7-提交事务
         tr.commit();

         //8-关闭会话
         se.close();

         //9-关闭会话工厂
         sf.close();

     }

 }