Java Web 中使用Hibernate开发的步骤

如何使用hibernate开始开发?(三个准备+七个步骤)
准备1: 添加hibernate依赖的jar文件（lib/requried下所有的jar文件）
准备2: 编写实体类和hibernate的映射文件(将实体和表建立关联映射): *.hbm.xml

package cn.zzsxt.entity;public class Userinfo {    private int userId;    private String userName;    private String userPass;    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 getUserPass() {        return userPass;    }    public void setUserPass(String userPass) {        this.userPass = userPass;    }}

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC     "-//Hibernate/Hibernate Mapping DTD 3.0//EN"    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping>    <!--       class节点        name="实体类全限定类名"        table="映射的表名"     -->    <class name="cn.zzsxt.entity.Userinfo" table="userinfo">        <!--            id节点                 name="实体中映射表中主键的属性名 "                type="属性的类型(全限定类名)"                column="映射的字段名称"         -->        <id name="userId" type="java.lang.Integer" column="userId">            <!-- assigned:手工指定 -->            <generator class="assigned"></generator>        </id>        <property name="userName" type="java.lang.String" column="userName"></property>        <property name="userPass"></property>    </class></hibernate-mapping>    

准备3: 配置hibernate配置文件: hibernate.cfg.xml

<?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>    <session-factory>        <!-- 驱动名称 -->        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>        <!-- url -->        <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property>        <!-- 用户名 -->        <property name="connection.username">root</property>        <!-- 密码 -->        <property name="connection.password">root</property>        <!-- 方言:dialect -->        <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>        <!-- 打印生成的sql语句 -->        <property name="show_sql">true</property>        <!-- 格式化输出sql语句 -->        <property name="format_sql">true</property>        <!-- 引入映射文件 -->        <mapping resource="cn/zzsxt/entity/Userinfo.hbm.xml"/>    </session-factory></hibernate-configuration>

七个步骤

    public static void main(String[] args) {        //1.创建Configuration对象,调用configure()解析配置文件hibernate.cfg.xml        Configuration cfg = new Configuration().configure();        //2.创建SessionFactory对象,解析映射文件*.hbm.xml        SessionFactory sessionFactory = cfg.buildSessionFactory();        //3.获取Session,类似于jdbc中Connection        Session session = sessionFactory.openSession();        //4. 开启事务        Transaction tx = session.beginTransaction();        //5.执行持久化操作        Userinfo user = new Userinfo();        user.setUserId(4);        user.setUserName("test3");        user.setUserPass("test3");        session.save(user);        //6.提交事务        tx.commit();        //7.关闭session        session.close();    }