package edu.xaut.hibernate;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;

import javax.persistence.Table;

@Entity

@Table(name="t_group")

public class Group {

    private int id;

    private String name;

    @Id

    @GeneratedValue

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    @Column(length = 20)

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

}

package edu.xaut.hibernate;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;

import javax.persistence.JoinColumn;

import javax.persistence.ManyToOne;

import javax.persistence.Table;

@Entity

@Table(name="t_user")

public class User {

    private int id;

    private String name;

    private String title;

    private Group group;

    @Id

    @GeneratedValue

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    @Column(length = 20)

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    @Column(length = 10)

    public String getTitle() {

        return title;

    }

    public void setTitle(String title) {

        this.title = title;

    }

    @ManyToOne

    @JoinColumn(name = "groupId")

    public Group getGroup() {

        return group;

    }

    public void setGroup(Group group) {

        this.group = group;

    }

}

生成的SQL语句如下：

create table t_group (

        id integer not null auto_increment,

        name varchar(20),

        primary key (id)

    )

    create table t_user (

        id integer not null auto_increment,

        name varchar(20),

        title varchar(10),

        groupId integer,