HIBERNATE接続MySQLデータベースの簡単な例
Personオブジェクト
Addressオブジェクト
Personプロファイル
Addressプロファイル
Hibernateプロファイル
log 4 jプロパティファイル
Testテスト対象
1、Hibernateのプロファイルは、srcのルートディレクトリの下に置く
2、*.hbm.xmlは永続化オブジェクトと一緒に配置されます
3、文字セットの問題:hibernateはJDBCを使って設定し、データベースと同期する
public class Person implements Serializable {
private static final long serialVersionUID = 1882657656924078522L;
private Integer personId;
private String name;
private Set<Address> adds = new HashSet<Address>();
public Person() {
super();
}
public Person(String name) {
super();
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<Address> getAdds() {
return adds;
}
public void setAdds(Set<Address> adds) {
this.adds = adds;
}
public Integer getPersonId() {
return personId;
}
public void setPersonId(Integer personId) {
this.personId = personId;
}
}
Addressオブジェクト
public class Address implements Serializable {
private static final long serialVersionUID = 6132530253376016245L;
private Integer addId;
private String decription;
private Person person;
public Address() {
super();
}
public Address(String decription) {
super();
this.decription = decription;
}
public Integer getAddId() {
return addId;
}
public void setAddId(Integer addId) {
this.addId = addId;
}
public String getDecription() {
return decription;
}
public void setDecription(String decription) {
this.decription = decription;
}
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}
}
Personプロファイル
<?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="vivi.test.hibernate.Person" table="person">
<id name="personId">
<generator class="identity"></generator>
</id>
<property name="name" />
<set name="adds" lazy="true" inverse="true" cascade="all-delete-orphan">
<key column="person_id"></key>
<one-to-many class="vivi.test.hibernate.Address" />
</set>
</class>
</hibernate-mapping>
Addressプロファイル
<?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="vivi.test.hibernate.Address" table="address">
<id name="addId">
<generator class="identity"></generator>
</id>
<property name="decription" />
<many-to-one name="person" column="person_id" not-null="true" cascade="none"
class="vivi.test.hibernate.Person" />
</class>
</hibernate-mapping>
Hibernateプロファイル
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">489702</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="connection.useUnicode">true</property>
<property name="connection.characterEncoding">utf8</property>
<property name="hbm2ddl.auto">update</property>
<!--<property name="show_sql">true</property>-->
<mapping resource="./vivi/test/hibernate/Address.hbm.xml"/>
<mapping resource="./vivi/test/hibernate/Person.hbm.xml"/>
</session-factory>
</hibernate-configuration>
log 4 jプロパティファイル
log4j.rootLogger = DEBUG, stdout
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L - %m%n
Testテスト対象
public class Test {
private final static Log logger = LogFactory.getLog(Test.class);
private static final SessionFactory sessionFactory;
static{
try{
// SessionFactory hibernate.cfg.xml , Src
sessionFactory = new Configuration().configure().buildSessionFactory();
logger.debug("============:) SessionFactory !:) ============");
}catch(Throwable ex){
logger.debug("============:( SessionFactory !:( ============");
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory(){
return sessionFactory;
}
public static void main(String[] args) {
Test test = new Test();
// Person ,
Person person = new Person();
person.setName(" ");
Set<Address> addrs = new HashSet<Address>();
Address addr1 = new Address();
addr1.setDecription(" - ");
addr1.setPerson(person);
addrs.add(addr1);
Address addr2 = new Address();
addr2.setDecription(" - ");
addr2.setPerson(person);
addrs.add(addr2);
person.setAdds(addrs);
test.Save(person);
//test.update(1);
//test.delete(2);
test.select();
}
/**
*
* @param person
*/
public void Save(Person person){
try{
// Hibernate Session
Session session = Test.getSessionFactory().getCurrentSession();
session.beginTransaction();
//
session.save(person);
session.getTransaction().commit();
logger.debug("============:) Person --- !:) ============");
}catch(HibernateException e){
e.printStackTrace();
logger.debug("============:( Person --- !:( ============");
}
}
/**
*
*/
public void select(){
try{
// Hibernate Session
Session session = Test.getSessionFactory().getCurrentSession();
session.beginTransaction();
// !!! hql , ( table)
String hql = "from Person";
List<Person> persons = session.createQuery(hql).list();
//
for(Person person : persons){
System.out.println();
System.out.println("***********" + person.getName() +"*****************");
Set<Address> adds = person.getAdds();
for(Iterator<Address> iter= adds.iterator(); iter.hasNext(); ){
Address address = iter.next();
System.out.println("*** : " + address.getDecription() + " ***");
}
System.out.println();
}
session.getTransaction().commit();
logger.debug("============:) --- !:) ============");
}catch(HibernateException e){
e.printStackTrace();
logger.debug("============:( --- !:( ============");
}
}
/**
*
* @param id
*/
public void update(Integer id){
try{
// Hibernate Session
Session session = Test.getSessionFactory().getCurrentSession();
session.beginTransaction();
// ID
Person person = (Person)session.load(Person.class, id);
//
person.setName("vivi_ ");
session.update(person);
session.getTransaction().commit();
logger.debug("============:) --- !:) ============");
}catch(HibernateException e){
e.printStackTrace();
logger.debug("============:( --- !:( ============");
}
}
public void delete(Integer id){
try{
// Hibernate Session
Session session = Test.getSessionFactory().getCurrentSession();
session.beginTransaction();
// ID
Person person = (Person)session.load(Person.class, id);
//
session.delete(person);
session.getTransaction().commit();
logger.debug("============:) --- !:) ============");
}catch(HibernateException e){
e.printStackTrace();
logger.debug("============:( --- !:( ============");
}
}
}
1、Hibernateのプロファイルは、srcのルートディレクトリの下に置く
2、*.hbm.xmlは永続化オブジェクトと一緒に配置されます
3、文字セットの問題:hibernateはJDBCを使って設定し、データベースと同期する
<property name="connection.useUnicode">true</property>
<property name="connection.characterEncoding">utf8</property>
mysql>Create DATABASE IF NOT EXISTS my_db default charset utf8 COLLATE utf8_general_ci;