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Hibernate作为JPA的一种实现,jpa的注解已经是hibernate的核心，hibernate只提供了一些补充，而不是两套注解。hibernate对jpa的支持够足量，在使用hibernate注解建议使用jpa
XML版本过程:
新建工程, 导入hibernate包, 数据库包, 建立数据库表, 新建model类, 测试类, 新建src下hibernate.cfg.xml, model 类下 Student.hbm.xml
annotation版本过程:
新建工程, 导入hibernate包, 数据库包, 建立数据库表, 新建model类 (里面加入@Entity(javax), 和@Id (主键)), 测试类, 新建src下hibernate.cfg.xml(加入映射)
所以annotation比较简单.
XML版本具体过程:
1. new->java project : hibernate_0100_HelloWorld
2. 引入所有Hibernate的jar包:
1. preferrence->java->build path->user library-> new("hibernate")-> Add JARs (hibernate3, antlr, commons-collections, dom4j, javassist, jta,slf4j-api, slf4j-nop)
2. 右键项目 build-> add libraries->user library->"hibernate"
3. 引入数据库包 build-> add external archieves-> mysql-connector....
4. 建立数据库的表
create database hibernate; use hibernate; create table student(id int primary key, name varchar(20), age int);
5. new class: Student package: com.bjsxt.hibernate.model
package com.bjsxt.hibernate.model;
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;
}
}
6. new class: StudentTest.java package: default
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import com.bjsxt.hibernate.model.Student;
public class StudentTest {
public static void main(String[] args) throws Exception{
Student s =new Student();
s.setId(2);
s.setName("lisi");
s.setAge(30);
Configuration cfg=new Configuration();
SessionFactory sf=cfg.configure().buildSessionFactory(); //默认找hibernate.cfg.xml,然后产生一个connection工厂
Session session = sf.openSession();
session.beginTransaction();
session.save(s);
session.getTransaction().commit();
session.close();
sf.close();
}
}
7. 在src下放hibernate.cfg.xml:
<?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="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">linda0213</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</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>
<!--<property name="format_sql">true</property> -->
<!-- Drop and re-create the database schema on startup
<property name="hbm2ddl.auto">update</property>
-->
<!--<mapping class="com.bjsxt.hibernate.model.Student"/> -->
<mapping resource ="com/bjsxt/hibernate/model/Student.hbm.xml"/>
</session-factory>
</hibernate-configuration>
8. 在model下new Student.hbm.xml:
<?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 package="com.bjsxt.hibernate.model">
<class name="Student" table="student">
<id name="id"></id>
<property name="name"/>
<property name="age"/>
</class>
</hibernate-mapping>
9. run -> java application.
运行出错的话一般还需要加入两个包: cglib-nodep-2.1_3.jar, commons-logging.jar
annotation版本具体过程:
1. 加入annotation相关的jar包(hibernate-annotations, ejb3-persistence, hibernate-commons-annotations )
2. 创建teacher表:
use hibernate; create table teacher(id int primary key, name varchar(20), title varchar(10));
3. 创建一个新的model 类, Teacher.java:
里面加入@Entity(javax), 和@Id (主键)
package com.bjsxt.hibernate.model;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Teacher {
private int id;
private String name;
private String title;
@Id
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 String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
3. 建立一个新的测试类TeacherTest.java;
import javax.persistence.Entity;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import com.bjsxt.hibernate.model.Teacher;
@Entity
public class TeacherTest {
public static void main(String[] args) throws Exception{
Teacher t =new Teacher();
t.setId(3);
t.setName("ww");
t.setTitle("high");
Configuration cfg=new AnnotationConfiguration();
SessionFactory sf=cfg.configure().buildSessionFactory(); //默认找hibernate.cfg.xml,然后产生一个connection工厂
Session session = sf.openSession();
session.beginTransaction();
session.save(t);
session.getTransaction().commit();
session.close();
sf.close();
}
}
4. hibernate-cfg.xml里加入这句话:
<mapping class="com.bjsxt.hibernate.model.Teacher"/>
Hibernate---第一个helloworld程序 (XML版本, annotation版本)
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原文地址：http://www.cnblogs.com/wujixing/p/5403943.html
