hibernate3学习笔记(十六)｜容器映射 - 编程入门网

hibernate3学习笔记(十六)｜容器映射

1.Set映射

DDL:

1.CREATE TABLE user (2.    id INT(11) NOT NULL auto_increment PRIMARY KEY,3.    name VARCHAR(100) NOT NULL default ''''4. );5.6.CREATE TABLE email (7.    id INT(11) NOT NULL,8.    address VARCHAR(100) NOT NULL9.);

User.java

1.package com.hb3.pack_11.model;2.3.import java.util.Set;4.
5.public class User {6.
7.    private Integer id;8.    private String name;9.    private Set<String> emails;10.
11.    public User() {12.    }13.
14.    public Integer getId() {15.        return id;16.    }17.    public void setId(Integer id) {18.        this.id = id;19.    }20.    public String getName() {21.        return name;22.    }23.    public void setName(String name) {24.        this.name = name;25.    }26.    public Set<String> getEmails() {27.        return emails;28.    }29.    public void setEmails(Set<String> emails) {30.        this.emails = emails;31.    }32.    public void addEmail(String email) {33.        this.emails.add(email);34.    }35.    public void removeEmail(String email) {36.        this.emails.remove(email);37.    }38.}

hibernate3学习笔记(十六)｜容器映射(2)

User.hbm.xml：

1.<?xml version="1.0" encoding="utf-8"?>2.<!DOCTYPE hibernate-mapping3.    PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"4.    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
5.
6.<hibernate-mapping>
7.
8.    <class name="com.hb3.pack_11.model.User" table="user">
9.10.        <id name="id" column="id" type="java.lang.Integer">
11.            <generator class="native" />
12.        </id>
13.
14.        <property name="name" column="name" type="java.lang.String" />
15.16.        <set name="emails" table="email">
17.            <key column="id" />
18.            <element type="java.lang.String" column="address" />
19.        </set>
20.    </class>
21.</hibernate-mapping>

测试代码：

1.package com.hb3.pack_11;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_11.model.User;13.
14.public class BusinessService {15.
16.    public static void main(String[] args) throws IOException, SQLException {17.18.        Configuration config = new Configuration().configure();19.        SessionFactory sessionFactory = config.buildSessionFactory();20.        Session session = sessionFactory.openSession();21.
22.23.        User user1 = new User();24.        user1.setEmails(new HashSet<String>());25.        user1.setName("shenbin");26.   

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