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();
}
}