Hibernate初体验及简单错误排除代码详解

<property name="connection.username">root</property>
<property name="connection.password">mysql</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql:///hibernate?useUnicode=true&amp;characterEncoding=UTF-8</property>
<property name="connection.dialect">org.hibernate.dialect.MySQLDialect</property>

import java.util.Date;
/**
   * 学生类，设计原则要遵循javaBean的设计原则
   * 
   * 1、共有的类 2、属性私有 3、属性使用setter和getter封装 4、提供龚鸥的不带参数的默认的构造方法
   * 
   * @author Administrator
   *
   */
public class Students {
	private String sname;
	private int sid;
	private Date birthday;
	private String gender;
	private String adress;
	public Students() {
	}
	public String getSname() {
		return sname;
	}
	public void setSname(String sname) {
		this.sname = sname;
	}
	public int getSid() {
		return sid;
	}
	public void setSid(int sid) {
		this.sid = sid;
	}
	public Date getBirthday() {
		return birthday;
	}
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	public String getGender() {
		return gender;
	}
	public void setGender(String gender) {
		this.gender = gender;
	}
	public String getAdress() {
		return adress;
	}
	public void setAdress(String adress) {
		this.adress = adress;
	}
	public Students(String sname, int sid, Date birthday, String gender, String adress) {
		this.sname = sname;
		this.sid = sid;
		this.birthday = birthday;
		this.gender = gender;
		this.adress = adress;
	}
	@Override
	    public String toString() {
		return "Students [sname=" + sname + ", sid=" + sid + ", birthday=" + birthday + ", gender=" + gender
		          + ", adress=" + adress + "]";
	}
}

 <mapping resource="Students.hbm.xml" />

import java.util.Date;
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;
public class StudentsTest {
	private SessionFactory sessionFactory;
	private Session session;
	private Transaction transaction;
	@Before
	    public void init() {
		// 创建配置对象
		Configuration config = new Configuration().configure();
		// 创建服务注册对象
		ServiceRegistry serviceRegister = new ServiceRegistryBuilder().applySettings(config.getProperties())
		          .buildServiceRegistry();
		// 创建会化工厂对象
		sessionFactory = config.buildSessionFactory(serviceRegister);
		// 会话对象
		session = sessionFactory.openSession();
		// 开启事务
		transaction = session.beginTransaction();
	}
	@Test
	    public void testSaveStudents() {
		Students s = new Students(1, "张三", "男", new Date(), "DLUT");
		// 保存对象进入数据库
		session.save(s);
	}
	@After
	    public void destory() {
		// 先提交事务
		transaction.commit();
		session.close();
		sessionFactory.close();
	}
}