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hibernate關系映射(多對多)

Posted on 2008-08-21 12:04 H2O 閱讀(481) 評論(0) 編輯收藏所屬分類: hibernate

用戶與角色---多對多

用戶

package com.yz.pojos;

import java.util.HashSet;
import java.util.Set;

/** *//**
* Users generated by MyEclipse Persistence Tools
*/

public class Users implements java.io.Serializable {

    // Fields

    private Integer uid;

    private String name;
    //告訴用戶所有的角色集合，一個用戶可以屬于多個角色
    private Set roles = new HashSet(0);

    // Constructors

    /** *//** default constructor */
    public Users() {
    }

    /** *//** minimal constructor */
    public Users(String name) {
        this.name = name;
    }

    /** *//** full constructor */
    public Users(String name, Set roles) {
        this.name = name;
        this.roles = roles;
    }

    // Property accessors

    public Integer getUid() {
        return this.uid;
    }

    public void setUid(Integer uid) {
        this.uid = uid;
    }

    public String getName() {
        return this.name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Set getRoles() {
        return roles;
    }

    public void setRoles(Set roles) {
        this.roles = roles;
    }

}

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
    <class name="com.yz.pojos.Users" table="users" catalog="ssh">
        <id name="uid" type="java.lang.Integer">
            <column name="uid" />
            <generator class="native" />
        </id>
        <property name="name" type="java.lang.String">
            <column name="name" length="32" not-null="true" />
        </property>
        
        <set name="roles" inverse="false" table="userroles">
            <key>
            
                <column name="uid" />
            </key>
            
            <many-to-many class="com.yz.pojos.Roles" column="rid"></many-to-many>
        </set>
    </class>
</hibernate-mapping>

角色

package com.yz.pojos;

import java.util.HashSet;
import java.util.Set;

/** *//**
* Roles generated by MyEclipse Persistence Tools
*/

public class Roles implements java.io.Serializable {

    // Fields

    private Integer rid;

    private String rname;
//一個角色可以被多個用戶所關聯，所以應該放用戶對象
    private Set users = new HashSet(0);

    // Constructors

    /** *//** default constructor */
    public Roles() {
    }

    /** *//** minimal constructor */
    public Roles(String rname) {
        this.rname = rname;
    }

    /** *//** full constructor */
    public Roles(String rname, Set users) {
        this.rname = rname;
        this.users = users;
    }

    // Property accessors

    public Integer getRid() {
        return this.rid;
    }

    public void setRid(Integer rid) {
        this.rid = rid;
    }

    public String getRname() {
        return this.rname;
    }

    public void setRname(String rname) {
        this.rname = rname;
    }

    public Set getUsers() {
        return users;
    }

    public void setUsers(Set users) {
        this.users = users;
    }



}

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
    <class name="com.yz.pojos.Roles" table="roles" catalog="ssh">
        <id name="rid" type="java.lang.Integer">
            <column name="rid" />
            <generator class="native" />
        </id>
        <property name="rname" type="java.lang.String">
            <column name="rname" length="32" not-null="true" />
        </property>
        <set name="users" inverse="true" table="userroles">
            <key>
                
                <column name="rid" />
            </key>
            
            <many-to-many class="com.yz.pojos.Users" column="uid"></many-to-many>
        </set>
    </class>
</hibernate-mapping>

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