I am now going to do forward engineering, the one-to-many relationship between User customers and Order orders

The following are their entity classes

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; } }

The following is the hbm.xml configuration file

I have checked other configurations and there is no problem, hibernate.cfg.xml is also fine (two entity model configuration items and hbm2ddl configuration have been added), but execution

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(); } }

After that, only the user table was generated, but the order table was not generated. What is the problem now?