Rhythmk 学习 Hibernate 01 - maven 创建Hibernate 项目之 增删改查入门

1、环境：

Maven ：3.1.1

开发工具：Spring Tool Suite

数据库 ： Mysql  5.6

2、项目文件结构

文件代码：

2.1 、pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>hibernate</groupId>
    <artifactId>hibernate</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>hibernate</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.3.5.Final</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.30</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

　2.2 、HibernateUtil.java

package com.rhythmk.hibernate01;

import javax.imageio.spi.ServiceRegistry;

import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistryBuilder;

/*
 *  参考 URL:
 *  http://docs.jboss.org/hibernate/orm/4.2/manual/en-US/html_single/
 * */
public class HibernateUtil {
	// By : rhythmk.cnblogs.com
	 private static final SessionFactory sessionFactory = buildSessionFactory();

	    private static   SessionFactory buildSessionFactory() {
	        try {

	        	Configuration configuration=new Configuration().configure();

	          return   configuration.buildSessionFactory(new ServiceRegistryBuilder().applySettings(configuration.getProperties()).build());

	        }
	        catch (Throwable ex) {

	            System.err.println("Initial SessionFactory creation failed." + ex);
	            throw new ExceptionInInitializerError(ex);
	        }

	    }

	    public static SessionFactory getSessionFactory() {
	        return sessionFactory;
	    }
}

　　

2.3、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">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

    <session-factory>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/shishuocms</property>
        <property name="connection.username">root</property>
        <property name="connection.password">wangkun</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="myeclipse.connection.profile">com.mysql.jdbc.Driver</property>
        <!--是否在后台显示Hibernate用到的SQL语句，开发时设置为true，便于差错，程序运行时可以在Eclipse的控制台显示Hibernate的执行Sql语句。项目部署后可以设置为false，提高运行效率 -->
        <property name="hibernate.show_sql">true </property>
        <mapping resource="com/rhythmk/model/user.hbm.xml" />
    </session-factory>

</hibernate-configuration>

2.4 User.java

package com.rhythmk.model;

import java.util.Date;

public class User {
	public Integer getUserId() {
		return userId;
	}

	public void setUserId(Integer userId) {
		this.userId = userId;
	}

	public Integer getOpenId() {
		return openId;
	}

	public void setOpenId(Integer openId) {
		this.openId = openId;
	}

	@Override
	public String toString() {

		return "User [userId=" + userId + ", openId=" + openId + ", type="
				+ type + ", name=" + name + ", createTime=" + createTime + "]";
	}

	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Date getCreateTime() {
		return createTime;
	}

	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}

	public Integer userId;
	public Integer openId;
	public String type;
	public String name;
	public Date createTime;
}

　　2.5  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>
    <class name="com.rhythmk.model.User" table="user">
        <id name="userId" type="int">
            <column name="userId" />
            <generator class="native" />
        </id>
        <property name="openId" type="int">
            <column name="openId" not-null="true" />
        </property>
        <property name="type" type="string">
            <column name="type" not-null="true" />
        </property>
        <property name="name" type="string">
            <column name="name" length="45" not-null="true" />
        </property>
        <property name="createTime" type="timestamp">
            <column name="createTime" not-null="true" />
        </property>

    </class>
</hibernate-mapping>

3、测试代码（hibernatedemo1.java）：

 插入：

@Test
	public void InsertUser() {

		SessionFactory sessionfac = HibernateUtil.getSessionFactory();

		Session session = null;
		org.hibernate.Transaction tran = null;
		try {
			sessionfac.openSession();
			User entity = new User();
			tran = session.beginTransaction();
			entity.setType("管理员");
			entity.setName("rhythmk");
			entity.setOpenId(1);
			entity.setCreateTime(new Date());
			session.save(entity);
			tran.commit();

			System.out.println("Insert into OK!");
		} catch (Exception e) {
			if (tran != null) {
				tran.rollback();
			}
			e.printStackTrace();
		} finally {
			if (session != null)
				session.close();

		}

	}

　　修改：

	@Test
	public void UpdateUser() {
		Session session = null;
		org.hibernate.Transaction tran = null;
		try {
			session = HibernateUtil.getSessionFactory().openSession();
			tran = session.beginTransaction();
			User entity = (User) session.load(User.class, 2);
			entity.setName("Update");
			session.save(entity);
			tran.commit();

			entity = (User) session.load(User.class, 2);

			System.out.println(entity.toString());

		} catch (Exception e) {
			if (tran != null) {
				tran.rollback();
			}
			// TODO: handle exception
			e.printStackTrace();

		} finally {
			if (session != null)
				session.close();

		}
	}

　　删除：

@Test
	public void DelUser() {

		Session session = null;
		org.hibernate.Transaction tran = null;
		try {
			session = HibernateUtil.getSessionFactory().openSession();
			tran = session.beginTransaction();
			Object obj = session.load(User.class, 4);
			User entity = null;
			if (obj != null) {
				entity = (User) obj;
			}

			if (entity != null) {
				session.delete(entity);
				System.out.println("删除成功！");
				tran.commit();
			}

		} catch (Exception e) {
			if (tran != null) {
				tran.rollback();
			}
			// TODO: handle exception
			e.printStackTrace();

		} finally {
			if (session != null)
				session.close();

		}

	}

　　单对象查询

@Test
	public void SelectUser() {
		Session session = null;
		try {
			session = HibernateUtil.getSessionFactory().openSession();
			User entity = (User) session.load(User.class, 2);
			System.out.println(entity.toString());

		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		} finally {
			if (session != null)
				session.close();

		}

	}

 List查询

　　

@Test
	public void SelectListUser() {
		Session session = null;
		try {
			session = HibernateUtil.getSessionFactory().openSession();
		Query query=	session.createQuery("from User ");
	   List<User> list=(List<User>)query.list();
	    for (User user : list) {
			System.out.println(user);
		}

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (session != null)
				session.close();

		}
	}

　　分页查询：

	@Test
	public void SelectPageListUser() {
	// 获取分页数据
		Session session = null;
		try {
			session = HibernateUtil.getSessionFactory().openSession();
		Query query=	session.createQuery("from User ");
	   List<User> list=(List<User>)query
			   .setFirstResult(0)  //从0项开始
			   .setMaxResults(3) //每页三条数据
			   .list();
	    for (User user : list) {
			System.out.println(user);
		}

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (session != null)
				session.close();

		}
	}

　　代码包：http://pan.baidu.com/s/1hq1esh2

备注：

添加 JBOOS TOOL路径
http://download.jboss.org/jbosstools/updates/stable/helios/