学习笔记---------------Hibernian3.3.2入门(配置和annotation两种方式)

一.

 

---

 

1.Student.java   实体bean

package com.bjsxt.hibernate;public class Student {private int id;private String name;private int age;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}

 

---

 

2.hibernate.cfg.xml   默认src目录下，需要把下面的映射文件加到这个里面

 

<?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> <!-- Database connection settings --> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="connection.url">jdbc:mysql://localhost/hibernate</property> <property name="connection.username">root</property> <property name="connection.password">bjsxt</property> <!-- JDBC connection pool (use the built-in) --> <property name="connection.pool_size">1</property> <!-- SQL dialect --> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <!-- Enable Hibernate's automatic session context management --> <property name="current_session_context_class">thread</property> <!-- Disable the second-level cache --> <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> <!-- Echo all executed SQL to stdout --> <property name="show_sql">true</property> <!-- Drop and re-create the database schema on startup --> <property name="hbm2ddl.auto">update</property> <mapping resource="com/bjsxt/hibernate/Student.hbm.xml"/><mapping class="com.bjsxt.hibernate.Teacher"/> </session-factory></hibernate-configuration>

 

---

 

3.Student.hbm.xml  映射文件

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping><class name="com.bjsxt.hibernate.Student"><id name="id" /><property name="name" /><property name="age" /> </class></hibernate-mapping>

---

 

4.测试//Configuration configuration=new AnnotationConfiguration();注解时使用

Configuration configuration=new Configuration();配置文件使用

package com.bjsxt.hibernate;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.AnnotationConfiguration;public class TeacherTest {public static void main(String[] args) {Teacher t = new Teacher();t.setId(1);t.setName("t1");t.setTitle("middle");SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();Session session = sessionFactory.getCurrentSession();session.beginTransaction();session.save(t);session.getTransaction().commit(); session.close();//我自己后加的 sessionFactory.close();//我自己后加的 }}

 

---

 

二.annotation

1.需要加入新的包，这个包在另一个中存在     这里不再需要映射文件了，用注解代替

 

---

 

2.Teacher.java

package com.bjsxt.hibernate;import javax.persistence.Entity;import javax.persistence.Id;@Entitypublic class Teacher {private int id;private String name;private String title;@Idpublic int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}} 

 

---

 

3.hibernate.cfg.xml中只需加入<mapping class="com.bjsxt.hibernate.Teacher"/>

<?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> <!-- Database connection settings --> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="connection.url">jdbc:mysql://localhost/hibernate</property> <property name="connection.username">root</property> <property name="connection.password">bjsxt</property> <!-- JDBC connection pool (use the built-in) --> <property name="connection.pool_size">1</property> <!-- SQL dialect --> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <!-- Enable Hibernate's automatic session context management --> <property name="current_session_context_class">thread</property> <!-- Disable the second-level cache --> <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> <!-- Echo all executed SQL to stdout --> <property name="show_sql">true</property> <!-- Drop and re-create the database schema on startup --> <property name="hbm2ddl.auto">update</property> <mapping resource="com/bjsxt/hibernate/Student.hbm.xml"/><mapping class="com.bjsxt.hibernate.Teacher"/> </session-factory></hibernate-configuration> 

 

---

 

4.测试

TeacherTest.java

package com.bjsxt.hibernate;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.AnnotationConfiguration;public class TeacherTest {public static void main(String[] args) {Teacher t = new Teacher();t.setId(1);t.setName("t1");t.setTitle("middle");SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();Session session = sessionFactory.getCurrentSession();session.beginTransaction();session.save(t);session.getTransaction().commit();}}