使用XDoclet
XDoclet项目给Java带来了面向属性的编程概念。XDoclet利用Javadoc标签格式（@attribute）来指定类、字段，或者方法级的元数据属性。XDoclet被实现为生成Hibernate XML元数据（或者其他东西，取决于插件）的一个Ant目标，作为构建过程的一部分。用XDoclet创建Hibernate XML映射文档很简单；不用手工编写，而是用定制的Javadoc标签给持久化类的Java源代码做上标记。
XDoclet下载地址：XDoclet2下载地址
/**
* 用户实体类
*
* @hibernate.mapping default-cascade="true"
* @hibernate.class table="TBL_USER"
*
*/
public class User {
private Integer id;// 用户编号
private String username;// 用户名
private String password;// 密码
public User() {
super();
}
public User(String username, String password) {
super();
this.username = username;
this.password = password;
}
/**
* @hibernate.id generator-class="native" column="USER_ID" type="integer"
* @return
*/
public Integer getId() {
return id;
}
@SuppressWarnings("unused")
private void setId(Integer id) {
this.id = id;
}
/**
* @hibernate.property column="UNAME" type="string" length="50" not-null="false"
* @return
*/
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
/**
* @hibernate.property column="UPWD" type="string" length="50" not-null="false"
* @return
*/
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}build.xml文件<?xml version="1.0" encoding="UTF-8"?>
<project name="XDoclet-Hibernate" basedir=".">
<!--后面的构建任务中可能会用到的一些基本属性-->
<property name="project.lib.dir" value="${basedir}/lib" />
<property name="project.src.dir" value="${basedir}/src" />
<property name="xdoclet.home" value="E:/Jar/xdoclet-plugins-dist-1.0.4" />
<property file="hibernate.properties" />
<!-- =================================================================== -->
<!-- Define the class path -->
<!-- =================================================================== -->
<path id="xdoclet.task.classpath">
<fileset dir="${xdoclet.home}/lib">
<include name="**/*.jar" />
</fileset>
</path>
<!-- 引用引入的jar包-->
<taskdef
name="xdoclet"
classname="org.xdoclet.ant.XDocletTask"
classpathref="xdoclet.task.classpath"
/>
<!-- =================================================================== -->
<!-- 生成Hibernate映射文件 -->
<!-- =================================================================== -->
<target name="gen-mapping">
<xdoclet>
<fileset dir="${project.src.dir}">
<include name="**/*.java" />
</fileset>
<component
classname="org.xdoclet.plugin.hibernate.HibernateMappingPlugin"
version="3.0"
destdir="${project.src.dir}" />
</xdoclet>
</target>
<!-- =================================================================== -->
<!-- 生成Hibernate配置文件 -->
<!-- =================================================================== -->
<target name="gen-configuration">
<xdoclet>
<fileset dir="${project.src.dir}">
<include name="**/*.java"/>
</fileset>
<component
classname="org.xdoclet.plugin.hibernate.HibernateConfigPlugin"
destdir="${project.src.dir}"
version="3.0"
hbm2ddlauto="create"
jdbcurl="${hibernare.connection.url}"
jdbcdriver="${hibernate.driver_class}"
jdbcusername="${hibernate.connection.username}"
jdbcpassword="${hibernate.connection.password}"
dialect="${hibernate.dialect}"
showsql="true"
/>
</xdoclet>
</target>
</project>