Hibernate用注解生成表

User.java实体来package com.tao.pojo;import javax.persistence.Column;//用注解的方式生成表import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;import org.hibernate.annotations.GenericGenerator;@Entity ???????//标明当前类是受Hibernate管理的，相当于映射了一个.XML文件 ???@Table(name="User") ???// ???表名和类名不一致的时候用，table是表名，当前类对应表的名字public class User { ???//主键 ???@Id// ???自动增长 ???@GeneratedValue(strategy=GenerationType.IDENTITY) ???private int id; ???//column指数据库表中的普通列（不是主键或外键的列）, ?name里面写列名,当列名和属性名相同的时候，column可以不写,nullable=false 不为空 ???@Column(name="name1",length=200,nullable=false) ???private String name; ???private Double money; ???????public User() { ???????super(); ???} ???public User(int id, String name, Double money) { ???????super(); ???????this.id = id; ???????this.name = name; ???????this.money = money; ???} ???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 Double getMoney() { ???????return money; ???} ???public void setMoney(Double money) { ???????this.money = money; ???} ???@Override ???public String toString() { ???????return "User [id=" + id + ", name=" + name + ", money=" + money + "]"; ???}}hibernate.cfg.xml配置文件<?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> ???????<!-- Database connection settings --> ???????<property name="connection.driver_class">com.mysql.jdbc.Driver</property> ???????<property name="connection.url">jdbc:mysql://localhost:3306/test1123?characterEncoding=utf-8</property> ???????<property name="connection.username">root</property> ???????<property name="connection.password">root</property> ???????<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property> ???????????????<property name="show_sql">true</property> ???????<property name="format_sql">true</property> ???????<!-- 如果没有就创建，有就更新 --> ???????<property name="hibernate.hbm2ddl.auto">update</property> ????????<mapping class="com.tao.pojo.User"/> ???????????</session-factory></hibernate-configuration>Test001.java测试类package com.tao.test;import java.util.List;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;import com.tao.pojo.User;public class Test001 { ???public static void main(String[] args) { ???????Configuration config = new Configuration().configure(); ???????SessionFactory factory = config.buildSessionFactory(); ???????Session session = factory.openSession(); ???????session.beginTransaction();// ???????设置了自动增长之后，这里的Id不起作用，可以不写，按照1,2,3,4,5，的顺序走，如果把,5删了，下一个是6， ???????//在创建表的时候先把save屏蔽掉，// ???????User us = new User(32, "啊哈", 32.0);// ???????session.save(us); ???????????????session.getTransaction().commit(); ???????session.close(); ???????factory.close(); ???????????}}