18基于主键双向多对多的关联映射.docVIP

基于主键的双向多对多的关联映射 角色Role 和功能 Function Role表 role_func Function表 Id name 1 admin 2 vip rid fid 1 1 1 2 1 3 1 4 2 1 2 2 Id Name Code Url 1 用户管理 User_Mag userAction 2 角色管理 Role_mag roleAction 3 系统管理 Sys_mag sysAction 4 权限管理 Priv_mag privAction 2、类Role 和Function类 Fole: public class Role { private int id; private String name; private SetFunction functions = new HashSetFunction(0); //get…set } Function: public class Function { private int id; private String name; private String code; private String url; private SetRole roles = new HashSetRole(0); public Function() { // TODO Auto-generated constructor stub } public Function(String name, String code, String url) { super(); = name; this.code = code; this.url = url; } //get…set } 映射文件 Role.hbm.xml hibernate-mapping package=cn.siggy.pojo class name=Role id name=id generator class=native/generator /id property name=name/ !-- 多对多 -- set name=functions table=role_func cascade=save-update !-- 表示当前类 映射到关系表中的列-- key column=rid/ !-- 所对应的另一方在关系表中的列 -- many-to-many column=fid class=Function/ /set /class /hibernate-mapping hibernate-mapping package=cn.siggy.pojo class name=Function id name=id !-- foreign表示引用外键 -- generator class=native/ /id property name=name/ property name=code/ property name=url/set name=roles table=role_func inverse=true key column=fid/ many-to-many column=rid class=Role/ /set /class /hibernate-mapping 测试代码 @Test public void testSave() throws HibernateException, SerialException, SQLException{ Session session = null; Transaction tx = null; try{ session = HibernateUtil.getSession(); tx = session.beginTransaction(); Function f1 = new Function(用户管理,user_mag,userAction); Function f2 = new Function(角色管理,role_mag,roleAction); Function f3 = new Function(系统管理,sys_mag,sysAction); Function f4 = new Function(权限管理,prev_mag,prevAction); Role r1 = new Role