1.
1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping 3 PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 4 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 5 <hibernate-mapping > 6 7 <class name="mypack.Monkey" table="MONKEYS"> 8 9 <id name="id" type="long" column="ID"> 10 <generator class="increment"/> 11 </id> 12 13 <property name="name" type="string" column="NAME" /> 14 15 <!-- 16 <many-to-one 17 name="team" 18 column="TEAM_ID" 19 class="mypack.Team" 20 lazy="false" 21 /> 22 --> 23 24 <!-- mapping with cascade --> 25 <!----> 26 <many-to-one 27 name="team" 28 column="TEAM_ID" 29 class="mypack.Team" 30 cascade="save-update" 31 lazy="false" 32 /> 33 34 35 </class> 36 37 </hibernate-mapping>
2.
1 package mypack;
2 public class Monkey{
3 private long id;
4 private String name;
5 private Team team;
6
7 public Monkey() {}
8 public Monkey(String name, Team team) {
9 this.name = name;
10 this.team = team;
11 }
12
13 public long getId() {
14 return this.id;
15 }
16
17 public void setId(long id) {
18 this.id = id;
19 }
20 public String getName() {
21 return this.name;
22 }
23
24 public void setName(String name) {
25 this.name = name;
26 }
27 public Team getTeam() {
28 return this.team;
29 }
30
31 public void setTeam(Team team) {
32 this.team = team;
33 }
34
35
36
37
38 }
3.
1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping 3 PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 4 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 5 <hibernate-mapping > 6 7 <class name="mypack.Team" table="TEAMS" > 8 <id name="id" type="long" column="ID"> 9 <generator class="increment"/> 10 </id> 11 12 <property name="name" type="string" column="NAME" /> 13 14 </class> 15 16 </hibernate-mapping>
4.
1 package mypack;
2 public class Team {
3 private long id;
4 private String name;
5
6 public Team() {
7 }
8
9 public Team(String name) {
10 this.name = name;
11 }
12
13 public long getId() {
14 return this.id;
15 }
16
17 public void setId(long id) {
18 this.id = id;
19 }
20 public String getName() {
21 return this.name;
22 }
23
24 public void setName(String name) {
25 this.name = name;
26 }
27
28
29
30
31 }
5.
1 package mypack;
2
3 import org.hibernate.*;
4 import org.hibernate.cfg.Configuration;
5 import java.util.*;
6
7 public class BusinessService{
8 public static SessionFactory sessionFactory;
9 static{
10 try{
11 // Create a configuration based on the properties file we‘ve put
12 Configuration config = new Configuration();
13 config.configure();
14 sessionFactory = config.buildSessionFactory();
15 }catch(RuntimeException e){e.printStackTrace();throw e;}
16 }
17
18 public List findMonkeysByTeam(Team team){
19 Session session = sessionFactory.openSession();
20 Transaction tx = null;
21 try {
22 tx = session.beginTransaction();
23
24 List monkeys=session.createQuery("from Monkey as m where m.team.id="+team.getId())
25 .list();
26 tx.commit();
27 return monkeys;
28 }catch (RuntimeException e) {
29 if (tx != null) {
30 tx.rollback();
31 }
32 throw e;
33 } finally {
34 session.close();
35 }
36 }
37
38 public Team findTeam(long team_id){
39 Session session = sessionFactory.openSession();
40 Transaction tx = null;
41 try {
42 tx = session.beginTransaction();
43 Team team=(Team)session.get(Team.class,new Long(team_id));
44 tx.commit();
45 return team;
46 }catch (RuntimeException e) {
47 if (tx != null) {
48 tx.rollback();
49 }
50 throw e;
51 } finally {
52 session.close();
53 }
54 }
55
56 public void saveTeamAndMonkeyWithCascade(){
57 Session session = sessionFactory.openSession();
58 Transaction tx = null;
59 try {
60 tx = session.beginTransaction();
61
62 Team team=new Team("BULL");
63 Monkey monkey1=new Monkey("Tom",team);
64 Monkey monkey2=new Monkey("Mike",team);
65
66 session.save(monkey1);
67 session.save(monkey2);
68
69 tx.commit();
70
71 }catch (RuntimeException e) {
72 if (tx != null) {
73 tx.rollback();
74 }
75 e.printStackTrace();
76 } finally {
77 session.close();
78 }
79 }
80
81 public void saveTeamAndMonkey(){
82 Session session = sessionFactory.openSession();
83 Transaction tx = null;
84 try {
85 tx = session.beginTransaction();
86
87 Team team=new Team("DREAM");
88 session.save(team);
89
90 Monkey monkey1=new Monkey("Jack",team);
91 Monkey monkey2=new Monkey("Bill",team);
92 session.save(monkey1);
93 session.save(monkey2);
94 tx.commit();
95
96 }catch (RuntimeException e) {
97 if (tx != null) {
98 tx.rollback();
99 }
100 throw e;
101 } finally {
102 session.close();
103 }
104 }
105
106 public void printMonkeys(List monkeys){
107 for (Iterator it = monkeys.iterator(); it.hasNext();) {
108 Monkey monkey=(Monkey)it.next();
109 System.out.println("Monkeys in "+monkey.getTeam().getName()+ " :"+monkey.getName());
110 }
111 }
112
113 public void test(){
114 saveTeamAndMonkey();
115 saveTeamAndMonkeyWithCascade();
116 Team team=findTeam(1);
117 List monkeys=findMonkeysByTeam(team);
118 printMonkeys(monkeys);
119 }
120
121 public static void main(String args[]){
122 new BusinessService().test();
123 sessionFactory.close();
124 }
125 }
6.
1 <?xml version="1.0" encoding="utf-8" ?> 2 <!DOCTYPE hibernate-configuration 3 PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" 4 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 5 <hibernate-configuration> 6 <session-factory> 7 <property name="dialect"> 8 org.hibernate.dialect.MySQLDialect 9 </property> 10 <property name="connection.driver_class"> 11 com.mysql.jdbc.Driver 12 </property> 13 <property name="connection.url"> 14 jdbc:mysql://localhost:3306/sampledb 15 </property> 16 <property name="connection.username"> 17 root 18 </property> 19 <property name="connection.password"> 20 1234 21 </property> 22 <property name="show_sql">true</property> 23 <mapping resource="mypack/Team.hbm.xml" /> 24 <mapping resource="mypack/Monkey.hbm.xml" /> 25 </session-factory> 26 </hibernate-configuration>
7.
1 drop database if exists SAMPLEDB; 2 create database SAMPLEDB; 3 use SAMPLEDB; 4 5 create table TEAMS ( 6 ID bigint not null, 7 NAME varchar(15), 8 primary key (ID)); 9 10 create table MONKEYS ( 11 ID bigint not null, 12 NAME varchar(15), 13 TEAM_ID bigint, 14 primary key (ID)); 15 16 alter table MONKEYS add index IDX_TEAM(TEAM_ID), 17 add constraint FK_TEAM foreign key (TEAM_ID) references TEAMS (ID);
8.
1 <?xml version="1.0"?>
2 <project name="Learning Hibernate" default="prepare" basedir=".">
3
4 <!-- Set up properties containing important project directories -->
5 <property name="source.root" value="5.1/src"/>
6 <property name="class.root" value="5.1/classes"/>
7 <property name="lib.dir" value="lib"/>
8 <property name="schema.dir" value="5.1/schema"/>
9
10 <!-- Set up the class path for compilation and execution -->
11 <path id="project.class.path">
12 <!-- Include our own classes, of course -->
13 <pathelement location="${class.root}" />
14 <!-- Include jars in the project library directory -->
15 <fileset dir="${lib.dir}">
16 <include name="*.jar"/>
17 </fileset>
18 </path>
19
20 <!-- Create our runtime subdirectories and copy resources into them -->
21 <target name="prepare" description="Sets up build structures">
22 <delete dir="${class.root}"/>
23 <mkdir dir="${class.root}"/>
24
25 <!-- Copy our property files and O/R mappings for use at runtime -->
26 <copy todir="${class.root}" >
27 <fileset dir="${source.root}" >
28 <include name="**/*.properties"/>
29 <include name="**/*.hbm.xml"/>
30 <include name="**/*.cfg.xml"/>
31 </fileset>
32 </copy>
33 </target>
34
35
36
37 <!-- Compile the java source of the project -->
38 <target name="compile" depends="prepare"
39 description="Compiles all Java classes">
40 <javac srcdir="${source.root}"
41 destdir="${class.root}"
42 debug="on"
43 optimize="off"
44 deprecation="on">
45 <classpath refid="project.class.path"/>
46 </javac>
47 </target>
48
49
50 <target name="run" description="Run a Hibernate sample"
51 depends="compile">
52 <java classname="mypack.BusinessService" fork="true">
53 <classpath refid="project.class.path"/>
54 </java>
55 </target>
56
57 </project>
时间： 2024-10-10 09:33:43