hibernate自动创建表的2中方式

1.创建学生类

package com.day02;


public class Student {
private int id;//定义成整形，但也可定义成字符串，但字符串有时不行，好奇怪。还是定义成整形。
private String name;
private  int age;
private String address;
public Student(){}
public Student(int id, String name, int age, String address) {
super();
this.id = id;
this.name = name;
this.age = age;
this.address = address;
}
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;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}


2.写配置文件

<?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 package="com.day02">
   <class name="Student" table="Student">
   <id name="id" column="oid">
   <generator class="native">
    </generator>
   </id>
   <property name="name" column="t_name"></property>
   <property name="age" column="t_age"></property>
   <property name="address" column="t_address"></property>
   </class>
</hibernate-mapping>

3.配置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">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

    <session-factory>
        <property name="connection.username">root</property>
        <property name="connection.url">jdbc:mysql://127.0.0.1/xiaogu</property>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="myeclipse.connection.profile">com.mysql.jdbc.Driver</property>
        <property name="connection.password">root</property>
        <property name="hbm2ddl.auto">create</property>//它就是创建表时，需添加的代码，但是有时不行，不知道怎么回事这时你需要改为<property name="hibernate.hbm2ddl.auto">create</property>。如果还不行，使用第二种方法。        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
    <mapping
   resource="com/day02/Student.hbm.xml" />
   <mapping
   resource="com/day02/Account.hbm.xml" />
    </session-factory>

</hibernate-configuration>

4.定义工具类

package com.day02;


import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HbnUtil {
private static SessionFactory sf;
static{
sf=new Configuration()
.configure("hibernate.cfg.xml")
.buildSessionFactory();
}
public  static Session getSession(){
  return sf.openSession();
}
public static void closeSessionFactory(){
  if(!sf.isClosed()){
  sf.close();
  }
}
}
5.写测试类

package com.day02;
import org.hibernate.Session;
public class Test {
public static void main(String[] args) {
Student stu=new Student();
stu.setAddress("hebei");
stu.setAge(23);
stu.setName("xiaogu");
  Session session=HbnUtil.getSession();
  session.beginTransaction();
     session.save(stu);
  session.getTransaction().commit();
  session.close();
 
}
} 

评论

2 楼 高级java工程师 2011-12-12  

晚上回家在换

1 楼 JAVA小丑 2011-12-12  

小龙哥你的头像换了，我像看原来那个。。。