我现在准备做正向工程，User客户和Order订单的一对多关系

下面是他们的实体类

package com.cw.entity;

import java.util.Set;

public class User implements java.io.Serializable {
    private Integer id;
    private String username;
    private String password;
    private Set order;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    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 Set getOrder() {
        return order;
    }
    public void setOrder(Set order) {
        this.order = order;
    }
    public User(String username, String password, Set order) {
        super();
        this.username = username;
        this.password = password;
        this.order = order;
    }
    
    
}

package com.cw.entity;

public class Order implements java.io.Serializable {
    private Integer id;
    private User user;
    private String shop;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public User getUser() {
        return user;
    }
    public void setUser(User user) {
        this.user = user;
    }
    public String getShop() {
        return shop;
    }
    public void setShop(String shop) {
        this.shop = shop;
    }
    public Order(User user, String shop) {
        super();
        this.user = user;
        this.shop = shop;
    }
    
}

下面是hbm.xml配置文件

其他配置我都检查了没问题，hibernate.cfg.xml也没问题（已经加了两个实体模型的配置项以及hbm2ddl配置），但是执行

package com.cw.entity;

import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.classic.Session;
import org.hibernate.id.Configurable;

public class Test {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Configuration configure = new Configuration().configure();
        SessionFactory buildSessionFactory = configure.buildSessionFactory();
        Session session = buildSessionFactory.openSession();
        Transaction tx = session.beginTransaction();
        tx.commit();
    }

}

之后只有user表生成了，order表没有生成，请问一下现在问题是出在哪？