Hibernate映射文件表之间关系配置模板

1.Hibernate关联映射-一对一(主外键,单双方向):

    

一, 单向外键一对一(many-to-one) 
1,主表:Account : (省略get,set方法) 
private Integer id; 
private String name; 
private Address address; //引用从表, 
从表:Address(省略get,set方法) 
private int id; 
private String address; 
2,配置文件 
在Account.hbm.xml中

    
        <many-to-one name="address" column="address_id" unique="true">
    many-to-one>
  • 1
  • 2
  • 3

二, 单向主键一对一(one-to-one) 
1,主表:IDCard(省略get,set方法) 
private Integer id; 
private String no; 
private Citizen citizen;//引用从表对象 
从表:Citizen(省略get,set方法) 
private int id; 
private String name; 
2,配置文件 
在IDCard.hbm.xml中,

<id name="id">
            <generator class="foreign">
                <param name="property">citizenparam>
            generator>
        id>
    
    <one-to-one name="citizen" constrained="true">one-to-one>
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7

三,双向外键一对一 
1,主表:Account : (省略get,set方法) 
private Integer id; 
private String name; 
private Address address; //引用从表, 
从表:Address(省略get,set方法) 
private int id; 
private String address; 
private Account account;//引用主表 
2,配置文件(在单向的基础上添加)

(1)在Account.hbm.xml中(主)
            
        <many-to-one name="address" column="address_id" unique="true">many-to-one>
  • 1
  • 2
  • 3

(2)在Address.hbm.xml中(从) 

四, 双向主键一对一 
1,主表:IDCard(省略get,set方法) 
private Integer id; 
private String no; 
private Citizen citizen;//引用从表对象 
从表:Citizen(省略get,set方法) 
private int id; 
private String name 
private IDCard idCard;//引用主表对象 
2,配置文件(在单向的基础上添加) 
(1)在IDCard.hbm.xml中

        <id name="id">
            <generator class="foreign">
                <param name="property">citizenparam>
            generator>
        id>
    
    <one-to-one name="citizen" constrained="true">one-to-one>
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
(2)在Citizen.hbm.xml中

        <one-to-one name="idCard" />

2.hibernate 关联映射 双向多对一(一对多):

1,实体类 
(1)Address(多端)(get,set方法省略)

private int addressid;
    private String addressinfo;
    private User user;//引用关联实体
  • 1
  • 2
  • 3
(2)User(一端)(get,set方法省略)
    private  int userid;
    private String name;
    private String password;
    private Set
address;//引用集合属性
  • 1
  • 2
  • 3
  • 4

2,配置文件 
Address.hbm.xml文件中

    <hibernate-mapping>
    <class name="com.john.hibernate.entity.Address" table="t_address_tab">
        
        <id name="addressid" type="int">
            <column name="address_id" />
            <generator class="identity" />
        id>
        <property name="addressinfo" type="java.lang.String">
            <column name="address_info" />
        property>
        <many-to-one name="user" class="com.john.hibernate.entity.User" fetch="join">
            <column name="user_id" />
        many-to-one>
    class>
hibernate-mapping>

在User配置文件中:

<hibernate-mapping>
    <class name="com.john.hibernate.entity.User" table="t_user_tab">
         
        <id name="userid" type="int">
            <column name="user_id" />
            <generator class="identity" />
        id>
        <property name="name" type="java.lang.String">
            <column name="name" />
        property>
        
        <set name="address" table="address" inverse="true" lazy="true">
            <key>
                <column name="user_id" />
            key>
            <one-to-many class="com.john.hibernate.entity.Address" />
        set>
    class>
hibernate-mapping>
3.HIbernate多对多简单总结:

多对多(Set):





你可能感兴趣的:(hibernate映射文件)