hibernate CRUD模板

实验步骤：

1.设计domain对象User。

2.设计UserDao接口。

3.加入hibernate.jar和其依赖的包。

4.编写User.hbm.xml映射文件，可以基于hibernate/eg目录下的org/hibernate/auction/User.hbm.xml修改。

5.编写hibernate.cfg.xml配置文件，可以基于hibernate/etc/hibernate.cfg.xml修改；必须提供的几个参数：
 connection.driver_class、connection.url、connection.username、connection.password、dialect、hbm2ddl.auto。

6.编写HibernateUtils类，主要用来完成Hibnerate初始化和提供一个获得Session的方法；这步可选。

7.实现UserDao接口。

package com.eric.hibernate.Domain;

import java.util.Date;

public class User {
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Date getBirthday() {
		return birthday;
	}
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	private int id;
	private String name;
	private Date birthday;
	
}

 

 

package com.eric.hibernate.Dao;

import com.eric.hibernate.Domain.User;

public interface UserDAO {
	public void saveUser(User user);
	public User findUserByName(String name);
	public User findUserById(int id);
	public void updateUser(User user);
	public void removeUser(User user);
}

 

 

<?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 package="com.eric.hibernate.Domain">

	<class name="User" table="user">
		<id name="id">
			<generator class="native" />
		</id>
		<property name="name" unique="true"/>
		<property name="birthday"/>
	</class>
</hibernate-mapping>

 

 

<!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="connection.url">jdbc:mysql:///hibernate</property>
		<property name="connection.username">root</property>
		<property name="connection.password">789+</property>
		
		<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
		
		<!-- 自动建表 -->
		<property name="hbm2ddl.auto">create</property>
		<!-- 控制台打印出SQL语句 -->
		<property name="show_sql">true</property>

		<!--  
		<class-cache class="com.eric.hibernate.Domain.User" usage="read-only"/>
		-->
		<mapping resource="com/eric/hibernate/Domain/User.hbm.xml"/>
	</session-factory>
</hibernate-configuration>

 

 

package com.eric.Utils;

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

public final class hibernateUtil {
	private static SessionFactory sessionFactory;
	private hibernateUtil(){
		
	}

	static{
		// 寻找配置文件，进行初始化
		Configuration cfg = new Configuration();
		// 可以在此指定配置文件的位置
		cfg.configure();
		sessionFactory = cfg.buildSessionFactory();
	}
	
	// 获取sessionFactory的方法
	public static SessionFactory getSessionFactory() {
		return sessionFactory;
	}
	
	// 获取session的方法
	public static Session getSession(){
		return sessionFactory.openSession();
	}
}

 

 

package com.eric.hibernate.Dao.Impl;

import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.eric.Utils.hibernateUtil;
import com.eric.hibernate.Dao.UserDAO;
import com.eric.hibernate.Domain.User;

public class UserDAOImpl implements UserDAO {

	// 保存用户
	public void saveUser(User user) {
		Session s = null;
		Transaction tx = null;
		try{
			s = hibernateUtil.getSession();
			tx = s.beginTransaction();
			s.save(user);
			tx.commit();
		}catch (HibernateException e) {
			if(tx != null){
				tx.rollback();
			}
			throw e;
		}finally{
			if(s != null){
				s.close();
			}
		}
	}

	// 根据name查找用户
	public User findUserByName(String name) {
		Session s = null ;
		try{
			s = hibernateUtil.getSession();
			String hql = "from User as user where user.name=:name";
			Query query = s.createQuery(hql);
			query.setString("name", name);
			User user = (User) query.uniqueResult();
			return user;
		}finally{
			if(s != null){
				s.close();
			}
		}
	}

	// 根据id查找用户
	public User findUserById(int id) {
		Session s = null ;
		try{
			s = hibernateUtil.getSession();
			User user = (User) s.get(User.class, id);
			return user;
		}finally{
			if(s != null)
			{
				s.close();
			}
		}
	}

	// 更新用户
	public void updateUser(User user) {
		Session s = null;
		Transaction tx = null;
		try{
			s = hibernateUtil.getSession();
			tx = s.beginTransaction();
			s.update(user);
			tx.commit();
		}catch (HibernateException e) {
			if(tx != null){
				tx.rollback();
			}
			throw e;
		}finally{
			if(s != null){
				s.close();
			}
		}
	}
	
	// 删除用户
	public void removeUser(User user) {
		Session s = null;
		Transaction tx = null;
		try{
			s = hibernateUtil.getSession();
			tx = s.beginTransaction();
			s.delete(user);
			tx.commit();
		}catch (HibernateException e) {
			if(tx != null){
				tx.rollback();
			}
			throw e;
		}finally{
			if(s != null){
				s.close();
			}
		}
	}
}

 

 

 

 

附加：log4j.xml

 

<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">  
  
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">  
  
    <appender name="appender1"  
        class="org.apache.log4j.RollingFileAppender">  
        <param name="File" value="logfile08.html" />  
        <param name="MaxFileSize" value="1MB" />  
        <param name="MaxBackupIndex" value="5" />  
        <layout class="org.apache.log4j.HTMLLayout">  
        </layout>  
    </appender>  
  
    <root>  
        <level value="debug" />  
        <appender-ref ref="appender1" />  
    </root>  
</log4j:configuration>