hibernate_exercise-many- to-one(1)

 1 package com.eneity; 2 ?3 public class User { 4 ?????5 ????private int id; 6 ????private String name; 7 ????private Group group;//注意这里不是gid 而是group对象 8 ?????9 ????public User() {10 ????????super();11 ????????// TODO Auto-generated constructor stub12 ????}13 ????public int getId() {14 ????????return id;15 ????}16 ????public void setId(int id) {17 ????????this.id = id;18 ????}19 ????public String getName() {20 ????????return name;21 ????}22 ????public void setName(String name) {23 ????????this.name = name;24 ????}25 ????public Group getGroup() {26 ????????return group;27 ????}28 ????public void setGroup(Group group) {29 ????????this.group = group;30 ????}31 ????32 33 }

 1 package com.eneity; 2 ?3 public class Group { 4 ?????5 ????private int id ; 6 ????private String name; 7 ?????8 ????public Group() { 9 ????????super();10 ????????// TODO Auto-generated constructor stub11 ????}12 ????public int getId() {13 ????????return id;14 ????}15 ????public void setId(int id) {16 ????????this.id = id;17 ????}18 ????public String getName() {19 ????????return name;20 ????}21 ????public void setName(String name) {22 ????????this.name = name;23 ????}24 25 }

 1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 3 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 4 <!-- Generated 2018-4-8 16:35:46 by Hibernate Tools 3.4.0.CR1 --> 5 <hibernate-mapping> 6 ????<class name="com.eneity.User" table="t_user"> 7 ????????<id name="id" type="int"> 8 ????????????<column name="ID" /> 9 ????????????<generator class="native" />10 ????????</id>11 ????????<property name="name" type="java.lang.String">12 ????????????<column name="NAME" />13 ????????</property>14 ????????<many-to-one name="group" class="com.eneity.Group" fetch="join">15 ????????????<column name="gid" />16 ????????</many-to-one>17 ????</class>18 </hibernate-mapping>

 1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 3 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 4 <!-- Generated 2018-4-8 16:35:46 by Hibernate Tools 3.4.0.CR1 --> 5 <hibernate-mapping> 6 ????<class name="com.eneity.Group" table="t_group"> 7 ????????<id name="id" type="int"> 8 ????????????<column name="ID" /> 9 ????????????<generator class="native" />10 ????????</id>11 ????????<property name="name" type="java.lang.String">12 ????????????<column name="NAME" />13 ????????</property>14 ????</class>15 </hibernate-mapping>

 1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE hibernate-configuration PUBLIC 3 ????????"-//Hibernate/Hibernate Configuration DTD 3.0//EN" 4 ????????"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 5 <hibernate-configuration> 6 ????<session-factory> 7 ????????<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 8 ????????<property name="hibernate.connection.password">xzt521</property> 9 ????????<property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:3306/myweb</property>10 ????????<property name="hibernate.connection.username">xzt</property>11 ????????????<!-- 配置显示sql语句 -->12 ????????<property name="show_sql">true</property>13 ????????<!-- 以一定的格式输出语句 -->14 ????????<property name="format_sql">true</property>15 ????????<mapping resource="com/eneity/Group.hbm.xml"/>16 ????????<mapping resource="com/eneity/User.hbm.xml"/>17 ????</session-factory>18 </hibernate-configuration>

 1 package com.test; 2 ?3 import org.hibernate.Session; 4 import org.hibernate.SessionFactory; 5 import org.hibernate.Transaction; 6 import org.hibernate.cfg.Configuration; 7 import org.junit.After; 8 import org.junit.Before; 9 import org.junit.Test;10 11 import com.eneity.Customers;12 import com.eneity.Group;13 import com.eneity.Order;14 import com.eneity.User;15 16 17 public class Test1 {18 ????private SessionFactory buildSessionFactory;19 ????private Session Session;20 ????private Transaction Transaction;21 22 ????@Before23 ????public void before() {24 ????????Configuration cfg = new Configuration().configure();25 ????????buildSessionFactory = cfg.buildSessionFactory();26 ????????Session = buildSessionFactory.openSession();27 ????????Transaction = Session.beginTransaction();28 ????????System.out.println(Session);29 ????????30 ????????31 ????}32 ????33 ????@Test34 ????public void test1() {35 ????????// TODO Auto-generated method stub36 ????????37 ????????Group group = new Group();38 ????????group.setName("duhao");39 ????????User user = new User();40 ????????user.setName("jiunan");41 ????????user.setGroup(group);42 ????????Session.save(group);43 ????????Session.save(user);44 ????????45 46 ????}47 ????48 ????@After49 ????public void after() {50 ????????Transaction.commit();51 ????????Session.close();52 ????????53 ????}54 }