//User.java
在企业中model类的属性可能有几百个而且还可能继承了很多属性，这样的model如果手写映射文件岂不是很大的工程！
这里介绍Ant+XDoclet配合来自动生成映射文件。
必备：Ant和XDocle的jar包。
操作很简单，自己写一个model类例如People.java,但是要自动生成映射文件这个类需要有注释，写一个build.xml文件，下载Xdoclet，网址：http://xdoclet.sourceforge.net/
新建包com.test.model，存放实体类Group，User
package dbdemo;
import java.util.Date;
import java.util.Set;
/**
* @hibernate.class table="Users"
*
* @author Ethan
*
* Represents a User
*/
public class User {
private String userID;
private String userName;
private String password;
private String emailAddress;
private Date lastLogon;
private Set contacts;
private Set books;
private Address address;
/**
* @hibernate.property column="EmailAddress" type="string"
* @return String
*/
public String getEmailAddress() {
return emailAddress;
}
/**
* @hibernate.property column="LastLogon" type="date"
* @return Date
*/
public Date getLastLogon() {
return lastLogon;
}
/**
* @hibernate.property column="Password" type="string"
* @return String
*/
public String getPassword() {
return password;
}
/**
* @hibernate.id generator-class="assigned" type="string"
*column="LogonID"
* @return String
*/
public String getUserID() {
return userID;
}
/**
* @hibernate.property column="Name" type="string"
* @return String
*/
public String getUserName() {
return userName;
}
/**
* @param string
*/
public void setEmailAddress(String string) {
emailAddress = string;
}
/**
* @param string
*/
public void setLastLogon(Date date) {
lastLogon = date;
}
/**
* @param string
*/
public void setPassword(String string) {
password = string;
}
/**
* @param string
*/
public void setUserID(String string) {
userID = string;
}
/**
* @param string
*/
public void setUserName(String string) {
userName = string;
}
/**
* @hibernate.set role="contacts" table="Contacts"
*cascade="all" readonly="true"
* @hibernate.collection-key column="User_ID"
* @hibernate.collection-one-to-many class="dbdemo.Contact"
* @return java.util.Set
*/
public Set getContacts() {
return contacts;
}
/**
* @param set
*/
public void setContacts(Set set) {
contacts = set;
}
/**
* @hibernate.set role="books" table="Book_User_Link"
*cascade="all" eadonly="true"
* @hibernate.collection-key column="UserID"
* @hibernate.collection-many-to-many
*class="dbdemo.Book" column="BookID"
* @return java.util.Set
*/
public Set getBooks() {
return books;
}
/**
* @param set
*/
public void setBooks(Set set) {
books = set;
}
/**
* @hibernate.one-to-one class="dbdemo.Address"
* @return dbdemo.Address
*/
public Address getAddress() {
return address;
}
/**
* @param address
*/
public void setAddress(Address address) {
this.address = address;
}
}
//在test目录下建立build.xml，其中<property name="xdoclet.home" value="C:/xdoclet-plugins-dist-1.0.4">为你所解压的xdoclet目录。 Ant build File build.xml
<project name="Hibernate Example" default="about" basedir=".">
<!-- The location where your xdoclet jar files reside -->
<property name="xdoclet.lib.home" value="c:/java_api/xdoclet-1.2b3/lib"/>
<target name="clean" depends="init" description="removes all directories
related to this build">
<delete dir="${dist}"/>
</target>
<target name="init" description="Initializes properties that are used by
other targets.">
<property name="dist" value="dist"/>
</target>
<target name="prepare" depends="init,clean" description="creates dist dir
ectory">
<echo message="Creating required directories..."/>
<mkdir dir="${dist}"/>
</target>
<target name="hibernate" depends="prepare"
description="Generates Hibernate class descriptor files.">
<taskdef name="hibernatedoclet" classname="xdoclet.
modules.hibernate.HibernateDocletTask"><classpath>
<fileset dir="${xdoclet.lib.home}">
<include name="*.jar"/>
</fileset>
</classpath>
</taskdef>
<!-- Execute the hibernatedoclet task -->
<hibernatedoclet
destdir="."
excludedtags="@version,@author,@todo"
force="true"
verbose="true"
mergedir="${dist}">
<fileset dir=".">
<include name="**/dbdemo/*.java"/>
</fileset>
<hibernate version="2.0"/>
</hibernatedoclet>
</target>
<target name="about" description="about this build file" depends="init">
<echo message="Use this format for the arguments:"/>
<echo message="ant hibernate"/>
<echo message=""/>
</target>
</project>
执行过程: Windows-->ShowView-->Other-->Ant文件里面(Ant)-->在Ant空白处右键 -->Add Buildfiles-->选择你要生成配置文件的bulild.xml文件点击OK,让后分别执行,所要生成的文件即可.赶快试试吧...
责任编辑：小草
