Hibernate之SchemaExport+配置文件生成表结构

今天说点基础的东西，说说如何通过SchemaExport跟Hibernate的配置文件生成表结构。其实方法非常简单，只需要两个配置文件，两个Java类就可以完成。

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>  

万事俱备只欠东风，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：