tips--*.hbm.xml 的生成:Component

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第一部分：我们主要讨论hbm.xml文件的生成。
现在的生成工具很多，有hibernte tools,xdoclet,middlegen,hibernatesync...
个人比较偏好xdoclet 和 hibernatesync :)

一:xdoclet
http://xdoclet.sourceforge.net/

二:hibernatesync 是Eclipse的一个plugin

Eclipse 2.1: http://www.binamics.com/hibernatesync/eclipse2.1

Eclipse 3M*: http://www.binamics.com/hibernatesync

------------------------------------------------------------------------------------

先来贴一个Component

那我们就直接看代码吧.
[code]

package cn.ya.model;

import java.io.Serializable;

/**
* @author <a href="Martin'>mailto:xpxxj@yahoo.com.cn">Martin Xu</a> Date: 2005-6-2
* @hibernate.class
* table="tb_user"
*/
public class TUser2 implements Serializable {

private static final long serialVersionUID = 1L;

private Integer id;

private Contact contact;

private Name name;

/**
* @hibernate.component
*/
public Contact getContact() {
return contact;
}

/**
* @param contact
* The contact to set.
*/
public void setContact(Contact contact) {
this.contact = contact;
}

/**
* @hibernate.id
* generator-class="native"
*/
public Integer getId() {
return id;
}

/**
* @param id
* The id to set.
*/
public void setId(Integer id) {
this.id = id;
}

/**
* @hibernate.component
*/
public Name getName() {
return name;
}

/**
* @param name
* The name to set.
*/
public void setName(Name name) {
this.name = name;
}

}

[/code]

我们将用户资料分为　姓名 Name 和联系方式 Contact．
(hibernate.component 只有两个属性prefix 和 class ) class 属性xdoclet会自动去取的.所以很简单,我们只需要@hibernate.component就可以了.

[code]
/**
*
*/
package cn.ya.model;

import java.io.Serializable;

/**
* @author <a href="Martin'>mailto:xpxxj@yahoo.com.cn">Martin Xu</a> Date: 2005-6-2
*
*/
public class Name implements Serializable {

private static final long serialVersionUID = 1L;

private String firstname;

private String lastname;

/**
* @hibernate.property
*/
public final String getFirstname() {
return firstname;
}

/**
* @param firstname
* The firstname to set.
*/
public final void setFirstname(String firstname) {
this.firstname = firstname;
}

/**
* @hibernate.property
*/
public final String getLastname() {
return lastname;
}

/**
* @param lastname
* The lastname to set.
*/
public final void setLastname(String lastname) {
this.lastname = lastname;
}

}

[/code]

[code]

package cn.ya.model;

import java.io.Serializable;

/**
* @author <a href="Martin'>mailto:xpxxj@yahoo.com.cn">Martin Xu</a> Date: 2005-6-2
*
*/
public class Contact implements Serializable {

private static final long serialVersionUID = 1L;

private String address;
private String tel;
private String zipcode;

/**
* @hibernate.property
*/
public String getAddress() {
  return address;
}
/**
* @param address The address to set.
*/
public void setAddress(String address) {
  this.address = address;
}
/**
* @hibernate.property
*/
public String getTel() {
  return tel;
}
/**
* @param tel The tel to set.
*/
public void setTel(String tel) {
  this.tel = tel;
}
/**
* @hibernate.property
*/
public String getZipcode() {
  return zipcode;
}
/**
* @param zipcode The zipcode to set.
*/
public void setZipcode(String zipcode) {
  this.zipcode = zipcode;
}

}
[/code]

我们只需在Contact 和 Name 写上hibernate.property就可以了,并不需要其他任何东西,xdoclet会自动把属性添加到component里面.

下面是最终产生的xml

[code]
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping
>
    <class
        name="cn.ya.model.TUser2"
        table="t_user2"
    >

</component>

</component>

</class>

</hibernate-mapping>

[/code]