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();
        
    }

}