hibernate经典配置与测试

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>
           <property name="hibernate.connection.driver_class">
           com.mysql.jdbc.Driver
           </property>
           <property name="hibernate.connection.url">
           jdbc:mysql:///crud
           </property>
           <property name="hibernate.connection.username">
           root
           </property>
           <property name="hibernate.connection.password">
           root
           </property>
           <property name="hibernate.dialect">
           org.hibernate.dialect.MySQLDialect
           </property>
           <property name="hibernate.connection.pool_size">
           1
           </property>
           <property name="hibernate.show_sql">
           true
           </property>
           <property name="current_session_context_class">
           thread
           </property>
           
           <mapping resource="com/kaisheng/pojo/User.hbm.xml"/>
        </session-factory>
      
    </hibernate-configuration>

User.java

package com.kaisheng.pojo;
public class User {
    private int id;
    private String userName;
    private String userPwd;
    
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getUserPwd() {
        return userPwd;
    }
    public void setUserPwd(String userPwd) {
        this.userPwd = userPwd;
    }
    
    
}

User.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="com.kaisheng.pojo">
        <class name="User" table="t_user">
           <id name="id" column="id">
           </id>
           <property name="userName" column="username"></property>
           <property name="userPwd" column="userpwd"></property>
        </class>
   </hibernate-mapping>

HibernateUtil.java

package com.kaisheng.util;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
/**
 * 单态模式（只产生一个类的实例）
 * @author Administrator
 *
 */
public class HibernateUtil {
    private static final SessionFactory factory=buildSessionFactory();
    private static SessionFactory buildSessionFactory() {
        return new Configuration().configure().buildSessionFactory();
    }
    
    public static SessionFactory getSessionFactory(){
        return factory;
    }
    
}

Test.java

package com.kaisheng.test;
import java.util.List;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.classic.Session;
import com.kaisheng.pojo.User;
import com.kaisheng.util.HibernateUtil;
public class Test {
    @SuppressWarnings("unchecked")
    public static void main(String[] args){
        User user=new User();
        user.setUserName("阿杰");
        user.setUserPwd("123");
        
        SessionFactory factory=HibernateUtil.getSessionFactory();
        
        Session session=factory.getCurrentSession();
        Transaction tran=session.beginTransaction();
        
        //session.save(user);添加
        //User userGet=(User) session.load(User.class, 2);
        //System.out.println(userGet.getUserName());
        List<User> userList=session.createQuery("from User").list();
        
        for(User u:userList){
            System.out.println(u.getUserName());
        }
        
        tran.commit();
        
    }
}