hibernate3学习笔记(二十)｜关系映射：多对多 - 编程入门网

User.hbm.xml

1.<?xml version="1.0" encoding="UTF-8"?>2.
3.<!DOCTYPE hibernate-mapping PUBLIC4.    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"5.    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
6.
7.<hibernate-mapping>8.
9.    <class name="com.hb3.pack_19.model.User" table="user">
10.11.        <id name="id" column="id" type="java.lang.Integer">12.            <generator class="native"/>13.        </id>14.
15.        <property name="name" column="name" type="java.lang.String"/>16.
17.        <set name="servers"18.             table="user_server"19.             cascade="save-update">20.21.            <key column="user_id"/>22.            <many-to-many class="com.hb3.pack_19.model.Server"23.                          column="server_id"/>24.        </set>25.    </class>26.
27.</hibernate-mapping>

测试代码：

1.package com.hb3.pack_19;2.3.import java.io.IOException;4.import java.sql.SQLException;5.import java.util.HashSet;6.
7.import org.hibernate.Session;8.import org.hibernate.SessionFactory;9.import org.hibernate.Transaction;10.import org.hibernate.cfg.Configuration;11.
12.import com.hb3.pack_19.model.Server;13.import com.hb3.pack_19.model.User;14.
15.public class BusinessService {16.
17.    public static void main(String[] args) throws IOException, SQLException {18.19.        Configuration config = new Configuration().configure();20.        SessionFactory sessionFactory = config.buildSessionFactory();21.        Session session = sessionFactory.openSession();22.
23.24.        Server server1 = new Server();25.        server1.setAddress("PC-219");26.        server1.setUsers(new HashSet<User>());27.
28.        Server server2 = new Server();29.        server2.setAddress("PC-220");30.        server2.setUsers(new HashSet<User>());31.32.        Server server3 = new Server();33.        server3.setAddress("PC-221");34.        server3.setUsers(new HashSet<User>());35.36.        User user1 = new User();37.        user1.setName("shenbin");38.        user1.setServers(new HashSet<Server>());39.40.        User user2 = new User();41.        user2.setName("chenyan");42.        user2.setServers(new HashSet<Server>());43.
44.        user1.getServers().add(server1);45.        user1.getServers().add(server2);46.        user1.getServers().add(server3);47.        server1.getUsers().add(user1);48.        server2.getUsers().add(user1);49.        server3.getUsers().add(user1);50.
51.        user2.getServers().add(server1);52.        user2.getServers().add(server3);53.        server1.getUsers().add(user2);54.        server3.getUsers().add(user2)

凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务，公司网站：http://www.lingzhong.cn 为了给广大客户了解更多的技术信息，本技术文章收集来源于网络,凌众科技尊重文章作者的版权，如果有涉及你的版权有必要删除你的文章，请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息，谢谢!