Java 测试Hibernate+Mysql简单的数据存储

想使用Hibernate框架，在网上看了一个Hibernate学习视频，试着做了一个小小的Java连接数据库的操作，Java初学者一个，大家多多包涵

开发环境：

　　1.安装MySql，

　　2.安装了Eclipse+插件hibernatetools-Update-4.1.2插件

　　3.java包导入1.hibernate-core　　2.Junit4.0　　3.mysql

思路：

　　1.配置Hibernate配置文件

　　

<?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="connection.username">root</property> <!-- 数据库用户名 -->
<property name="connection.password"></property>     <!-- 数据库密码 -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql:///hibernate?useUnicode=true&charactertEncoding=UTF-8</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>

<property name="show_sql">true</property> <!-- SQL输出到控制台 -->
<property name="format_sql" >true</property> <!-- 格式化SQL -->
<property name="hbm2ddl.auto">update</property>    <!-- create|update|create-drop|validate:检查数据表结构是否相同 -->

<mapping resource="Students.hbm.xml" />    <!-- 学生配置文件 -->
</session-factory>
</hibernate-configuration>

　　2.定义持久话学生类

//学生类
public class Students {
// 1.公有的类
// 2.提供公有的不带参数的默认的构造方法
// 3.属性私有
// 4.属性setter/getter封装

private int sid;

private String sname;

private String gender;

private String address;

public Students() {

}

public Students(int sid, String sname, String gender, String address) {
// super();
this.sid = sid;
this.sname = sname;
this.gender = gender;
this.address = address;
}

public int getSid() {
return sid;
}

public void setSid(int sid) {
this.sid = sid;
}

public String getSname() {
return sname;
}

public void setSname(String sname) {
this.sname = sname;
}

public String getGender() {
return gender;
}

public void setGender(String gender) {
this.gender = gender;
}

public String getAddress() {
return address;
}

public void setAddress(String address) {
this.address = address;
}

@Override
public String toString() {
return "Students [sid=" + sid + ", sname=" + sname + ", gender="
+ gender + ", address=" + address + "]";
}

}

3.配置Students.hbm.xml文件，这个是由Hibernate插件工具自动完成的，Src右键-Other-Hibernate-hbm.xml配置文件

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 2015-6-25 19:45:24 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="Students" table="STUDENTS">
<id name="sid" type="int">
<column name="SID" />
<generator class="assigned" />
</id>
<property name="sname" type="java.lang.String">
<column name="SNAME" />
</property>
<property name="gender" type="java.lang.String">
<column name="GENDER" />
</property>
<property name="address" type="java.lang.String">
<column name="ADDRESS" />
</property>
</class>
</hibernate-mapping>

4.定义一个StudentsTest测试类

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

//测试类
//@SuppressWarnings("deprecation")
public class StudentsTest {

private SessionFactory sessionFactory; //会话工厂
private Session session;               //会话
private Transaction transaction;

@Before        //之前
public void init()  //初始化
{
//创建配置对象
Configuration config=new Configuration().configure();
//创建服务注册对象
ServiceRegistry serviceRegistry=new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();
//创建会话工厂对象
sessionFactory=config.buildSessionFactory(serviceRegistry);
//会话对象
session=sessionFactory.openSession();
//开启事务
transaction=session.beginTransaction();
}

@After    //之后
public void destory()
{
transaction.commit();    //提交事务
session.close();        //关闭会话
sessionFactory.close(); //关闭会话工厂
}

@Test    //测试
public void testSaveStudents()
{
Students s=new Students(3,"张三丰","男","武当山");
session.save(s);
Students s1=new Students(4,"shexunyu","男","咸宁");
session.save(s1);    //保存对象进入数据库
}

}

5.到这就算完成了，在把工程的目录结构截图给大家





6.大家可以右键StudentsTest右键Runas-JUnit Test进行测试吧，好啦，代码我上传了，点这里下载
http://files.cnblogs.com/files/shexunyu/Java-Hibernate_002.zip
User:shexunyu Date:2015-06-26 Contact: