组件映射
xml配置方式：
tb_user
字段名主键类型描述idpkint编号first_name?varchar(50)姓last_name?varchar(50)名birthday?Date出生年月?
package com.zchen.hibernate;import org.hibernate.cfg.AnnotationConfiguration;import org.hibernate.tool.hbm2ddl.SchemaExport;import org.junit.Test;public class Snippet {@Testpublic void testSchemaExport(){new SchemaExport(new AnnotationConfiguration().configure()).create(true, true);}}?
