1、导hibernate包的核心jar包。。。
2、导hbm.xml文件
3、导hibernate.cfg.xml文件
以上三个文件为hibernate环境搭建的基础材料...其可以到hibernate的官网去
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4、编写pojo类(这里以Student类为例)
[java]
package com.njupt.pojo;
import java.io.Serializable;
public class Student implements Serializable{
private int id;
private String name;
private String pwd;
private int age;
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 String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
5、HibernateUtil类
[java]
package com.njupt.util;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
// 创建SessionFactory
private static SessionFactory sessionFactory;
// 使用静态代码块(只创建一次)来创建sessionFactory
static{
// 读取配置hibernate.cfg.xml
try {
Configuration configuration =
new Configuration().configure("hibernate.cfg.xml");
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
e.printStackTrace();
}
}
// 获得session
public static Session getSession(){
return sessionFactory.openSession();
}
// 关闭session,session总是默认保存数据(save(),get(),load()...)
// 很可能出现内存泄露
public static void close(Session session){
if(session!=null){
if(session.isOpen()){// null.isOpen
session.close();
}
}
}
}
6、进行测试
编写测试类SessionTest
[java]
package com.njupt.util;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.junit.Test;
import com.njupt.pojo.Student;
import com.njupt.util.HibernateUtil;
public class SessionTest {
// public void testSave(){
// // System.out.println("保存");
// String str =null;
// System.out.println(str.length());
// }
// 1 保存操作
@Test
public void testSave() {
Session session = null;
Transaction transaction = null;
try {
// 首先获得session
session = HibernateUtil.getSession();
// 获得Transaction
transaction = session.getTransaction();
// 开启事务
transaction.begin();
// 创建person对象
Student person = new Student();
person.setName("zzt_love_hjd");