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hibernate多对多例子
hibernate多对多例子 1.建表 create ? table ?student (sid? varchar ( 32 )? not ? null ? primary ? key , ?sname? varchar ( 16 ), ?sage? varchar ( 16 ), ) create ? table ?course (cid? varchar ( 32 )? not ? null ? primary ? key , cname? varchar ( 16 ) ) create ? table ?student_course_link (sid? varchar ( 32 )? not ? null , cid? varchar ( 32 )? not ? null , primary ? key (sid,cid) ) 2.写VOStudentVO package?com.test; import?java.util.Set; public?class?Student { ????private?String?sid; ????private?String?sname; ????private?String?sage; ????private?Set?course; ????public?Student() ????{ ????} ???//写上get?set Course vo package?com.test; import?java.util.Set; public?class?Course { ????private?String?cid; ????private?String?cname; ????private?Set?student; ???//写上get?set 写配置文件Student.hbm.xml ?xml?version=1.0? !DOCTYPE?hibernate-mapping ????PUBLIC?-//Hibernate/Hibernate?Mapping?DTD//EN ????/hibernate-mapping-2.0.dtd hibernate-mapping ????class?name=com.test.Student?table=student? ????????id?name=sid?type=string?unsaved-value=null? ????????????column?name=sid?sql-type=char(32)?not-null=true/ ????????????generator?class=uuid.hex/ ????????/id property?name=sname ????????????column?name=sname?sql-type=varchar(16)?not-null=true/ ????????/property ????????property?name=sage ????????????column?name=sage?sql-type=varchar(16)?not-null=true/ ????????/property ????????set?name=course?table=student_course_link?cascade=all?outer-join=false ????????????key?column=sid/ ????????????many-to-many?class=com.test.Course?column=cid/ ????????/set ??? ????/class /hibernate-mapping property name=cname column name=cname sql-type=varchar(16) not-null=true/ /property set name=student table=student_course_link lazy=false cascade=all key column=cid/ many-to-many class=com.test.Student column=sid/ /set /class /hibernate-mapping 写测试类 package?com.test; impo
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