第一个Hibernate项目

一、构建Hibernate项目

1.新建Java项目HibernateDemo1

2.导入Hibernate下的jar包（lib->required下的所有jar包）+jdbc驱动包

3.导入hibernate.cfg.xml文件到src目录下（在Hibernate文件目录中搜索*.cfg.xml）

配置该文件如下：

          <!DOCTYPE hibernate-configuration PUBLIC 
         "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
         "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> 
         <hibernate-configuration> 
         <session-factory> 
             <property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property> 
             <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
             <property name="hibernate.connection.url">jdbc:mysql:///hibernate_db</property> 
             <property name="hibernate.connection.username">root</property> 
         <property name="hibernate.connection.password">root</property> 
         <property name="hibernate.hbm2ddl.auto">update</property> 
         <property name="hibernate.show_sql">true</property> 
         <property name="hibernate.format_sql">true</property> 
         <mapping resource="com\eduask\pojo\Person.hbm.xml" /> 
         </session-factory> 
         </hibernate-configuration> 

4.建立mysql数据库hibernate_db

5.在src目录下建两个包com.eduask.pojo、com.eduask.test

pojo包下建一个Person类(Person.java)，内容如下：

  package com.eduask.pojo; 
 import java.util.Date; 
 public class Person { 
     private Integer id; 
     private String name; 
     private int password; 
     private Date birthday; 
      
     public Person() {} 
     public Person(String name, int password, Date birthday) { 
         super(); 
         this.name = name; 
         this.password = password; 
         this.birthday = birthday; 
     } 
     @Override 
     public String toString() { 
         return "Person [id=" + id + ", name=" + name + ", password=" + password + ", birthday=" + birthday + "]"; 
     } 
     public Integer getId() { 
         return id; 
     } 
     public void setId(Integer id) { 
         this.id = id; 
     } 
     public String getName() { 
         return name; 
     } 
     public void setName(String name) { 
         this.name = name; 
     } 
     public int getPassword() { 
         return password; 
     } 
     public void setPassword(int password) { 
         this.password = password; 
     } 
     public Date getBirthday() { 
         return birthday; 
     } 
     public void setBirthday(Date birthday) { 
         this.birthday = birthday; 
     } 
      
      
}

pojo包下引入xml文件Person.hbm.xml,（Hibernate包中搜索），修改内容如下：

  <?xml version="1.0"?> 
<!DOCTYPE hibernate-mapping SYSTEM "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" >
 <hibernate-mapping> 
     <class name="com.eduask.pojo.Person" table="t_person"> 
         <id name="id"> 
             <generator class="native"/> 
         </id> 
         <property name="name" column="t_name"></property> 
         <property name="password" length="6"></property> 
         <property name="birthday"></property> 
     </class> 
 </hibernate-mapping> 

test包中新建测试类HibernateTest.java,内容如下：

  package com.eduask.test; 
 import java.util.List; 
 import org.hibernate.Criteria; 
 import org.hibernate.Session; 
 import org.hibernate.SessionFactory; 
 import org.hibernate.Transaction; 
 import org.hibernate.cfg.Configuration; 
 import com.eduask.pojo.Person; 
 public class HibernateTest { 
     public static void main(String[] args) { 
         Configuration config = new Configuration().configure(); 
         SessionFactory factory = config.buildSessionFactory(); 
         Session session = factory.openSession(); 
         Transaction tx = session.beginTransaction(); 
         Person p = new Person("admin",123456,new java.util.Date());  
         Criteria c = session.createCriteria(Person.class); 
         List<Person> lists = c.list(); 
         System.out.println(lists.get(0).getName()); 
         tx.commit(); 
         session.close(); 
         factory.close(); 
     } 
}