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hibernate基础教程liu.xls

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hibernate用类描述数据库的表personpidpnameageJDBCHibernatepublicclassPersonVo{publicclassPersonPO{privateintpid;privateIntegerpidprivateStringpname;privateStringpname;privateintage;privateintage;//gettersetter//gettersetter}}表和表之间的关系一对多deptemployeediddnameleadereidenamedid1java1liu12c2li1主键外键主表从表JDBC需要关联查询publicclassDeptVo{publicclassEmployeeVo{publicclassDeptEmpVo{privateintdid;privateinteid;privateintdid;privateStringdname;privateStringename;privateStringdname;privateStringleader;privateintdid;privateStringleader;//gettersetterprivateinteid;}}privateStringename;//gettersetterHibernate}publicclassDeptPO{publicclassEmployeePO{privateintdid;privateinteid;privateStringdname;privateStringename;privateStringleader;privateDeptPOdept;privateSetemployees;//gettersetter//gettersetter}}EmployeePoliu=session.get(EmployeePo.class,1);DeptPOdept=liu.getDept();使用接口类型privateHashSetemployees错误CollectionList<TestVo>list=newArrayList<TestVo>();listListSetListmylist=newArrayList(set);mylistvo2vo1ArrayListHashSetPersistentSetArrayList(Collectionc)list1list2set1set2vo1vo2vo2vo3vo1vo2vo2vo3vo4vo5并集交集单向一对多publicclassDeptPO{publicclassEmployeePO{privateintdid;privateinteid;privateStringdname;privateStringename;privateStringleader;privateSetemployees;//gettersetter//gettersetter}}单向多对一publicclassDeptPO{publicclassEmployeePO{privateintdid;privateinteid;privateStringdname;privateStringename;privateStringleader;privateDeptPOdept;//gettersetter//gettersetter}}双向jdbcsqlpublicclassDeptPO{publicclassEmployeePO{selectd.dname,e.enamefromdeptd,employeeeprivateintdid;privateinteid;whered.did=e.didprivateStringdname;privateStringename;privateStringleader;privateDeptPOdept;privateSetemployees;//gettersetter//gettersetter}}EmployeePoemp=session.get();select*fromemployeewhereid=?DeptPOdept=(DeptPO)session.get(DeptPO.class,1)DeptPodept=emp.getDept();Setemps=dept.getEmployees();System.out.println(dept.getDname());select*fromdeptwheredeptid=?一对一useruserinfouseridusernamepasswordroleidusernamesexageaddressuserid多对多stud