hibernate入门搭建过程(附源码)
1.创建项目并导入所需jar包
2.创建实体类
package com.entity;
import java.util.Date;
public class User {
private String id;
private String name;
private String password;
private Date createTime;
private Date expireTime;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Date getCreateTime() {
return createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
public Date getExpireTime() {
return expireTime;
}
public void setExpireTime(Date expireTime) {
this.expireTime = expireTime;
}
}
3.在数据库创建实体类相对应的表
4.创建实体映射文件User.hbm.xml,与实体类放在同一个包中
<?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.entity.User">
<id name="id">
<generator class="uuid"/>
</id>
<property name="name"/>
<property name="password"/>
<property name="createTime"/>
<property name="expireTime"/>
</class>
</hibernate-mapping>
5.创建数据库连接配置文件(核心配置文件)hibernate.cfg.xml,放在src下
<!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="hibernate.connection.url">jdbc:mysql://localhost:3306/myhibernate</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.show_sql">true</property>
<mapping resource="com/entity/User.hbm.xml"/>
</session-factory>
</hibernate-configuration>
6.创建测试类Client.java
package test;
import java.util.Date;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import com.entity.User;
public class Client {
public static void main(String[] args){
//读取hibernate.cfg.xml文件
Configuration cfg = new Configuration().configure();
//建立SessionFactory
SessionFactory factory = cfg.buildSessionFactory();
//取得session
Session session = null;
try {
session = factory.openSession();
//开启事务
session.beginTransaction();
User user = new User();
user.setName("Tom");
user.setPassword("123");
user.setCreateTime(new Date());
user.setExpireTime(new Date());
//保存User对象
session.save(user);
//提交事务
session.getTransaction().commit();
} catch (Exception e) {
e.printStackTrace();
//回滚事务
session.getTransaction().rollback();
}finally{
if(session != null){
if(session.isOpen()){
//关闭session
session.close();
}
}
}
}
}