Hibernate（一）

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-configuration PUBLIC ???????"-//Hibernate/Hibernate Configuration DTD 3.0//EN" ???????"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration> ???<!--配置工厂信息，全局信息 --> ???<session-factory> ???????<!--数据库驱动类全称 ?--> ???????<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> ???????<!--数据库url地址 ?--> ???????<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/david2018_db?characterEncoding=UTF-8</property> ???????<!--用户名 ?--> ???????<property name="hibernate.connection.username">root</property> ???????<!--密码 ?--> ???????<property name="hibernate.connection.password">1234</property> ???????<!--方言 --> ???????<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property> ???????<!--执行DDL的类别： ???????create:每次都删除新建 ???????update:存在就修改，不存在就新建 ?--> ???????<property name="hibernate.hbm2ddl.auto">update</property> ???????<!--是否显示SQL语句 ?--> ???????<property name="hibernate.show_sql">true</property> ???????<!--是否格式化SQL语句 ?--> ???????<property name="hibernate.format_sql">true</property> ???????<!-- 启用getCurrentSession，默认未启用 --> ???????<property name="hibernate.current_session_context_class">thread</property> ???????<!--基于xml映射文件： 映射文件加载。路径 --> ???????<mapping resource="com/hibernate/domain/User.hbm.xml"></mapping> ???</session-factory></hibernate-configuration>

package com.hibernate.domain;public class User { ???private int UserId; ???private String UserName; ???private String PassWord; ???private int Age; ???private String Sex; ???public User(){ ???} ???public User(String userName,String password,int age,String sex){ ???????this.UserName = userName; ???????this.PassWord = password; ???????this.Age = age; ???????this.Sex = sex; ???} ???public int getUserId() { ???????return UserId; ???} ???public void setUserId(int UserId) { ???????this.UserId = UserId; ???} ???public String getUserName() { ???????return UserName; ???} ???public void setUserName(String UserName) { ???????this.UserName = UserName; ???} ???public String getPassWord() { ???????return PassWord; ???} ???public void setPassWord(String PassWord) { ???????this.PassWord = PassWord; ???} ???public int getAge() { ???????return Age; ???} ???public void setAge(int Age) { ???????this.Age = Age; ???} ???public String getSex() { ???????return Sex; ???} ???public void setSex(String Sex) { ???????this.Sex = Sex; ???}}

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping ???????SYSTEM ???????"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" ><!--映射标签 package：内部类的所在的包名 --><hibernate-mapping package="com.hibernate.dao"> ???<!--需要设置的映射类：设置该类对应的表 ?--> ???<!--属性： ???name:类名 ???table:表名 ?--> ???<class name="com.hibernate.domain.User" table="User"> ???????<!--id:主键，name:属性名称，column：字段名称 ?--> ???????<id name="UserId" column="UserId"> ???????????<!--generator:主键生成策略 ???????????class:标记主键如何生成 ???????????取值： ???????????1、native：自动增长，会根据当前的数据库自动切换 ???????????2、identity：mySQL的自增策略 ???????????3、sequence：Oracle的自增标记 ???????????4、uuid:32位字符串 ???????????5、assigned:自定义字符串 ???????????6、foreign：外键 ???????????7、increment：自己维护自增关系 ?????????????--> ???????????<generator class="native"/> ???????</id> ???????<!--配置属性对应的字段 ?--> ???????<property name="UserName" column="UserName"/> ???????<property name="PassWord" column="PassWord"/> ???????<property name="Age" column="Age"/> ???????<property name="Sex" column="Sex"/> ???</class></hibernate-mapping>

import com.hibernate.domain.User;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;public class Main { ???public static void main(String[] args) { ???????// 加载配置文件 ???????Configuration configuration = new Configuration().configure(); ???????// 创建Session工厂 ???????SessionFactory sessionFactory = configuration.buildSessionFactory(); ???????// 创建Session对象 ???????Session session = sessionFactory.openSession(); ???????// 开启事务 ???????Transaction tx = session.beginTransaction(); ???????User user = new User("测试", "666666",18,"男"); ???????//执行保存 ???????session.save(user); ???????//提交事务 ???????tx.commit(); ???????session.close(); ???????sessionFactory.close(); ???}}