Hibernate之SchemaExport+配置文件生成表结构

首先要生成表,得先有实体类,以Person.java为例:

/**
 * 
 * @author Administrator
 * @hibernate.class table="T_Person"
 */
public class Person {
    
    /**
     * @hibernate.id
     * generator-class="native"
     */
    private int id;
    
    /**
     * @hibernate.property
     */
    private String name;
    
    /**
     * @hibernate.property
     */
    private String sex;
    
    /**
     * @hibernate.property
     */
    private String address;
    
    /**
     * @hibernate.property
     */
    private String duty;
    
    /**
     * @hibernate.property
     */
    private String phone;
    
    /**
     * @hibernate.property
     */
    private String description;
    
    /**
     * @hibernate.many-to-one
     */
    private Orgnization org;
    
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
    public String getDuty() {
        return duty;
    }
    public void setDuty(String duty) {
        this.duty = duty;
    }
    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 getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public Orgnization getOrg() {
        return org;
    }
    public void setOrg(Orgnization org) {
        this.org = org;
    }
}

接下来就是Person类对应的配置文件Person.hbm.xml,配置如下:

<hibernate-mapping>
  <class table="T_Person" name="com.tgb.model.Person">
    <id name="id">
      <generator class="native"/>
    </id>
    <property name="name"/>
    <property name="sex"/>
    <property name="address"/>
    <property name="duty"/>
    <property name="phone"/>
    <property name="description"/>
    <many-to-one name="org"></many-to-one>
  </class>
</hibernate-mapping>

还有包含Person.hbm.xml相关信息的Hibernate默认配置文件,hibernate.cfg.xml:

<hibernate-configuration>
  <session-factory>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://127.0.0.1/test</property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password">123456</property>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.hbm2ddl.auto">update</property>
    <property name="hibernate.current_session_context_class">thread</property>
    <mapping resource="com/tgb/model/Person.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

最后我们还需要一个根据上述内容生成数据表的小工具,即ExportDB.Java:

import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class ExportDB {
      
    /** 
     * @param args 
     */  
    public static void main(String[] args) {  
          
        // 默认读取hibernate.cfg.xml文件  
        Configuration cfg = new Configuration().configure();  
          
        // 生成并输出sql到文件(当前目录)和数据库  
        SchemaExport export = new SchemaExport(cfg);  
          
        // 创建表结构,第一个true 表示在控制台打印sql语句,第二个true 表示导入sql语句到数据库
        export.create(true, true);  
    }  
}

完成以上步骤以后,只需要执行ExportDB类即可,当然前提是已经在mysql中创建了对应的数据库,我们这里创建了一个名为test的测试数据库。执行成功之后我们就可以看到数据库里已经有了我们的t_person表了

 

 

 

//ssh下配置

配置好person类和hbm.xml文件后,在spring配置文件中<sessionfactory>中加上

<prop key="hibernate.hbm2ddl.auto">
update
</prop>

posted on 2014-08-25 09:56  暮光之眼  阅读(292)  评论(0编辑  收藏  举报