创建Hibernate项目步骤

Myth丶恋晨 2022-04-22 06:32 293阅读 0赞

创建项目（java  project / dynamic web project）

添加需要的jar包

一、在项目上单击右键，选择New  ——》other

二、点击下面的Hibernation 创建hibernate.cfg.xml文件

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三、数据库加载的数据，在Session factory name  处可以为空，不必创建名称

数据库URL后面必须填写数据库项目名称

四、在eclipse页面上面显示hibernate视窗

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四、在eclipse页面上面显示hibernate视窗

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五、在项目上右键，创建reveng.xml文件  直接点击next

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六、不用点击，直接用默认的方式，点击next

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七、创建映射类对应的hbm.xml文件

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八、反向生成对应的类

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下图完成之后点击apply，然后选择上面的Exporters

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选择下图的Domain code  和   Hibemate XML Mappings

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配置文件

<?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 name="sessionFactory">
        <property name="hibernate.show_sql">true</property>
            <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
            <property name="hibernate.connection.password">tiger</property>
            <property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>
            <property name="hibernate.connection.username">scott</property>
            <property name="hibernate.default_schema">scott</property>
            <property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
            <mapping resource="com/db/entity/User.hbm.xml"/> 
        </session-factory>
    </hibernate-configuration>

user 类

package com.db.entity;
    public class User {
    	private Long id;
    	private String name;
    	private String password;
    	
    	public Long getId() {
    		return id;
    	}
    	public void setId(Long id) {
    		this.id = id;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    	public User(Long id, String name, String password) {
    		super();
    		this.id = id;
    		this.name = name;
    		this.password = password;
    	}
    	public User() {
    		super();
    	}
    	
    }

user的映射文件

<?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>
        <class name="com.db.entity.User" table="USERS">
            <id name="id" type="java.lang.Long">
                <column name="ID" />
                <generator class="assigned" />
            </id>
            <property name="name" type="java.lang.String">
                <column name="NAME" />
            </property>
            <property name="password" type="java.lang.String">
                <column name="PASSWORD" />
            </property>
        </class>
    </hibernate-mapping>

对数据库对应数据表进行增删改操作：

package com.db.test;
    
    import java.util.List;
    
    import javax.jws.soap.SOAPBinding.Use;
    
    import org.hibernate.Query;
    import org.hibernate.SessionFactory;
    import org.hibernate.Transaction;
    import org.hibernate.cfg.Configuration;
    import org.hibernate.classic.Session;
    
    import com.db.entity.User;
    
    public class HibernateTest1 {
    public static void main(String[] args) {
    	//add();
    	//delete();
    	//update();
    	//doQueryAll();
    	doQuery();
    	
    }
    //增加
    public static  void  add(){
    	Configuration con=new Configuration().configure();
    	//创建SessionFactory
    	SessionFactory sessionFactory=con.buildSessionFactory();
    	//打开一个会话  与数据库
    	Session session=sessionFactory.openSession();
    	User user=new User(98L,"gg","123456");
    	Transaction ts=session.beginTransaction();
    	session.save(user);
    	ts.commit();
    	session.close();
    	sessionFactory.close();
    }
    //删除
    public static void delete(){
    	Configuration con=new Configuration().configure();
    	//创建SessionFactory
    	SessionFactory sessionFactory=con.buildSessionFactory();
    	//打开一个会话  与数据库
    	Session session=sessionFactory.openSession();
    	User user=(User) session.get(User.class, 98L);
    	//事务开始
    	Transaction tx=session.beginTransaction();
    	session.delete(user);
    	//提交
    	tx.commit();
    	session.close();
    	sessionFactory.close();
    }
    //修改
    public static void update(){
    	Configuration conn=new Configuration().configure();
    	//单例模式   创建SessionFactory
    	Session session=conn.buildSessionFactory().openSession();
    	//事务开始
    	User user=(User) session.get(User.class, 14L);
    	//修改什么就重新设置属性值
    	user.setName("xiaoming");
    	Transaction tx=session.beginTransaction();
    	//提交
    	session.update(user);
    	tx.commit();
    	session.close();
    }
    //查询所有数据
       public static void doQueryAll(){
    	   Configuration conn=new Configuration().configure();
    	   //打开session连接
    	   Session session=conn.buildSessionFactory().openSession();
    	 //事务开始
    	   Transaction tx=session.beginTransaction();
    	   //创建查询
    	   Query query= session.createQuery("from User");  //from 后面跟映射的类名
    	   List<User> list=query.list(); 
    	   //提交
    	   tx.commit();
    	   //关闭session
    	   session.close();
    		for (int i = 0; i < list.size(); i++) {
    			System.out.println(list.get(i).getName()+" "+list.get(i).getPassword());	
    		}
       }
       public static void doQuery(){
    	   Configuration conn=new Configuration().configure();
    	   //打开session连接
    	   Session session=conn.buildSessionFactory().openSession();
    	 //事务开始
    	   Transaction tx=session.beginTransaction();
    	   //创建查询
    	   User user= (User) session.get(User.class,14L );
    	   //提交
    	   tx.commit();
    	   //关闭session
    	   session.close();
    	   System.out.println(user.getName()+" "+user.getPassword());
       }
    
    }

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