Hibernate映射关系的详细介绍
Hibernate映射关系的详细介绍
本次测试的条件：eclipse3.2+MyEclipse5.0+Sql server 2K
第一、在sql中建立两个表student，与course
student:：字段为stuId,stuName,courseId
course：字段为courseId,courseName
两个表的DDL如下很简单：
createtable"tytc"."dbo"."student"("stuId"intnotnull,"stuName"char(10)null,"courseId"intnotnull,constraint"PK_student"primarykey("stuId"))createtable"tytc"."dbo"."course"("courseId"intnotnull,"courseName"char(10)null,constraint"PK_course"primarykey("courseId"))第二、利用MyEclipse中的工具自动生成映射文件，如下
Student.hbm.xml为：
<?xmlversion="1.0"?><!DOCTYPEhibernate-mappingPUBLIC"-//Hibernate/HibernateMappingDTD3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><!--MappingfileautogeneratedbyMyEclipse-HibernateTools--><hibernate-mapping><classname="lcy.bo.Student"table="student"schema="dbo"catalog="tytc"><idname="stuId"type="java.lang.Integer"><columnname="stuId"/><generatorclass="assigned"/></id><many-to-onename="course"class="lcy.bo.Course"fetch="select"><columnname="courseId"not-null="true"/></many-to-one><propertyname="stuName"type="java.lang.String"><columnname="stuName"length="10"/></property></class></hibernate-mapping>Course.hbm.xml为：
<?xmlversion="1.0"?><!DOCTYPEhibernate-mappingPUBLIC"-//Hibernate/HibernateMappingDTD3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><!--MappingfileautogeneratedbyMyEclipse-HibernateTools--><hibernate-mapping><classname="lcy.bo.Course"table="course"schema="dbo"catalog="tytc"><idname="courseId"type="java.lang.Integer"><columnname="courseId"/><generatorclass="assigned"/></id><propertyname="courseName"type="java.lang.String"><columnname="courseName"length="10"/></property><setname="students"inverse="true"><key><columnname="courseId"not-null="true"/></key><one-to-manyclass="lcy.bo.Student"/></set></class></hibernate-mapping>