第一个使用annotation的小程序

1 导入必要的jar包： hibernate-annotations.jar，ejb3-persistence.jar，hibernate-commons-annotations.jar ,还有hibernate-jpa-2.0-api-1.0.0.Final found at hibernate-distribution-3.5.3-Final\lib\jpa.
2 创建表  create table teacher(id int primary key, name varchar(20),title varchar(20））；
3 创建Teacher类：
package com.archer.model;
import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class Teacher {
int id;
String name;
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;
}
}
4  在hibernate.cfg.xml 里加入 <mapping class="com.archer.model.Teacher">
5  写测试类TeacherTest.java
 
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;

import com.archer.model.*;
public class TeacherTest {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Teacher t = new Teacher();
t.setId(1);
t.setName("teac");
t.setTitle("mid");
Configuration cfg = new AnnotationConfiguration();
SessionFactory sf = cfg.configure().buildSessionFactory();
Session session = sf.openSession();
session.beginTransaction();
session.save(t);
session.getTransaction().commit();
session.close();
sf.close();
}

}

6 运行之后检查后台和数据库。

ps:
Eclipse中Annotation@不能正确提示的解决办法

  解决方法： windows -> Preferences -> java -> editor -> Content Assist

设置 Auto-Activation 如下 :


     Auto-Activation
    1.) 勾选Enable auto activation选项
    2.) Auto activation delay ->  (100)
    3.) Auto activation triggers for Java ->  (.@)
    4.) Auto activation triggers for Javadoc ->  (#)