通過進一步學習Nhibernate基礎知識，掌握用Nhiberate實現對級聯的支持，通過一個簡單的用戶角色權限系統來體驗nhibernate對級聯的強大支持。
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2）開發環境和必要準備?
? 開發環境為:windows 2003,Visual studio .Net 2005,Sql server 2005 developer edition
? 必要準備：學習前三篇nhibernate學習系列Nhibernate學習之起步篇-1? ,Nhibernate學習起步之many-to-one篇 ,Nhibernate學習之many-to-many篇
3)示例
? 業務需求：實現一個用戶角色權限系統，一個用戶只有一個角色，一個角色下有多個用戶，一個角色下有多個權限，一個權限也對應多個角色
????????????????????? 要求: (1).創建一個角色 (2)在該角色上創建兩個個用戶3)創建兩個權限4)指定該角色上的權限列表5)獲得一個用戶的權限列表
? 首先看關系數據庫關系圖:
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4)實現步驟:
? 1.User.cs
using?System;using?System.Collections.Generic;using?System.Text;namespace?NhibernateSample1
{
????public?class?User
????{????????private?int?_id;????????private?string?_name;????????private?string?_pwd;????????private?Role?_role;????????/**////?<summary>????????///?編號
????????///?</summary>????????public?virtual?int?Id????????{????????????get????????????{????????????????return?_id;????????????}????????????set????????????{????????????????_id?=?value;????????????}????????}????????/**////?<summary>????????///?名稱????????///?</summary>????????public?virtual?string?Name????????{????????????get????????????{????????????????return?_name;????????????}????????????set????????????{????????????????_name?=?value;????????????}????????}????????/**////?<summary>????????///?密碼????????///?</summary>????????public?virtual?string?Pwd????????{????????????get????????????{????????????????return?_pwd;????????????}????????????set????????????{????????????????_pwd?=?value;????????????}????????}????????public?virtual?Role?Role????????{????????????get????????????{????????????????return?_role;????????????}????????????set????????????{????????????????_role?=?value;????????????}????????}????}
}<?xml?version="1.0"?encoding="utf-8"??><hibernate-mapping?xmlns="urn:nhibernate-mapping-2.2">??<class?name="NhibernateSample1.User,NhibernateSample1"?table="Users"?lazy="false">????<id?name="Id"?column="Id"?unsaved-value="0">??????<generator?class="native"?/>????</id>????<property?name="Name"?column="Name"?type="string"?length="64"?not-null="true"?unique="true"></property>????<property?name="Pwd"??column="Pwd"??type="string"?length="64"?not-null="true"></property>????<many-to-one?name="Role"??class="NhibernateSample1.Role,NhibernateSample1"?column="RoleID"></many-to-one>???</class></hibernate-mapping>using?System;using?System.Collections.Generic;using?System.Text;using?System.Collections;namespace?NhibernateSample1{????public?class?Role????{????????int?_roleID;????????string?_roleName;????????IList?_list?=?new??ArrayList();????????IList?_permissionList?=?new?ArrayList();????????public?virtual?IList?PermissionList????????{????????????get????????????{????????????????return?_permissionList;????????????}????????????set????????????{????????????????_permissionList?=?value;????????????}????????}????????public?virtual?int?RoleID????????{????????????get????????????{????????????????return?_roleID;????????????}????????????set????????????{????????????????_roleID?=?value;????????????}????????}????????public?virtual?IList?UserList????????{????????????get????????????{????????????????return?_list;????????????}????????????set????????????{????????????????_list?=?value;????????????}????????}????????public?virtual?string?RoleName????????{????????????get????????????{????????????????return?_roleName;????????????}????????????set????????????{????????????????_roleName?=?value;????????????}????????}????}}<?xml?version="1.0"?encoding="utf-8"??><hibernate-mapping?xmlns="urn:nhibernate-mapping-2.2">??<class?name="NhibernateSample1.Role,NhibernateSample1"?table="Roles"?lazy="false">????<id?name="RoleID"?column="RoleID"?unsaved-value="0">??????<generator?class="native"?/>????</id>????<property?name="RoleName"??column="RoleName"??type="string"?length="64"?not-null="true"></property>????<bag?name="PermissionList"?table="Role_Permissions"?inverse="true"?lazy="false"?cascade="all">??????<key?column="RoleID"/>??????<many-to-many?class="NhibernateSample1.Permission,NhibernateSample1"?column="PermissionID"></many-to-many>????</bag>????<bag?name="UserList"?table="Users"?inverse="true"?lazy="false"?cascade="all">??????<key?column="RoleID"/>??????<one-to-many?class="NhibernateSample1.User,NhibernateSample1"></one-to-many>????</bag>??</class></hibernate-mapping>using?System;using?System.Collections.Generic;using?System.Text;using?System.Collections;namespace?NhibernateSample1{????public?class?Permission????{????????int?_permissionID;????????string?_permissionName;????????IList?_roleList?=?new?ArrayList();????????public?virtual?int?PermissionID????????{????????????get????????????{????????????????return?_permissionID;????????????}????????????set????????????{????????????????_permissionID?=?value;????????????}????????}????????public?virtual?string?PermissionName????????{????????????get????????????{????????????????return?_permissionName;????????????}????????????set????????????{????????????????_permissionName=value;????????????}????????}????????public?virtual?IList?RoleList????????{????????????get????????????{????????????????return?_roleList;????????????}????????????set????????????{????????????????_roleList?=?value;????????????}????????}????}}<?xml?version="1.0"?encoding="utf-8"??><hibernate-mapping?xmlns="urn:nhibernate-mapping-2.2">??<class?name="NhibernateSample1.Permission,NhibernateSample1"?table="Permissions"?lazy="false">????<id?name="PermissionID"?column="PermissionID"?unsaved-value="0">??????<generator?class="native"?/>????</id>????<property?name="PermissionName"?column="PermissionName"?type="string"?length="64"?not-null="true"?unique="true"></property>????<bag?name="RoleList"?table="Role_Permissions"??lazy="true">??????<key?column="PermissionID"/>??????<many-to-many?class="NhibernateSample1.Role,NhibernateSample1"?column="RoleID"></many-to-many>????</bag>??</class></hibernate-mapping>UserRolePermissionFixureusing?System;using?System.Collections.Generic;using?System.Text;using?System.Collections;using?NHibernate;using?NHibernate.Cfg;using?NHibernate.Tool.hbm2ddl;namespace?NhibernateSample1{????public??class?UserRolePermissionFixure????{????????private?ISessionFactory?_sessions;?????????public?void?Configure()????????{????????????Configuration?cfg?=?GetConfiguration();??????????????????_sessions?=?cfg.BuildSessionFactory();????????}????????Configuration?GetConfiguration()????????{????????????string?cfgPath?=?@"E:\my?project\nhibernate?study\simle?1\NHibernateStudy1\NhibernateSample1\hibernate.cfg.xml";????????????Configuration?cfg?=?new?Configuration().Configure(cfgPath);????????????return?cfg;????????}????????public?void?ExportTables()????????{????????????Configuration?cfg?=?GetConfiguration();???????????????????????new?SchemaExport(cfg).Create(true,?true);????????}????????public?Role?CreateRole(string?roleName)????????{????????????Role?r?=?new?Role();????????????r.RoleName?=?roleName;????????????ISession?session?=?_sessions.OpenSession();????????????????????????ITransaction?tx?=?null;????????????try????????????{????????????????tx?=?session.BeginTransaction();????????????????session.Save(r);????????????????tx.Commit();????????????}????????????catch(Exception?e)????????????{????????????????if?(tx?!=?null)?tx.Rollback();????????????????throw?e;????????????}????????????finally????????????{????????????????session.Close();????????????}????????????return?r;????????}????????public?User?CreateUser(String?name,string?pwd,Role?r)????????{????????????User?u?=?new?User();????????????u.Name?=?name;????????????u.Pwd?=?pwd;????????????u.Role?=?r;????????????//r.UserList.Add(u);????????????ISession?session?=?_sessions.OpenSession();????????????ITransaction?tx?=?null;????????????try????????????{????????????????tx?=?session.BeginTransaction();????????????????session.Save(u);????????????????tx.Commit();????????????}????????????catch?(HibernateException?e)????????????{????????????????if?(tx?!=?null)?tx.Rollback();????????????????throw?e;????????????}????????????finally????????????{????????????????session.Close();????????????}????????????return?u;????????}????????public?Permission?CreatePermission(Role?r,string?name)????????{????????????Permission?p?=?new?Permission();????????????p.PermissionName?=?name;????????????r.PermissionList.Add(p);????????????p.RoleList.Add(r);????????????ISession?session?=?_sessions.OpenSession();????????????ITransaction?tx?=?null;????????????try????????????{????????????????tx?=?session.BeginTransaction();????????????????session.Save(p);????????????????tx.Commit();????????????}????????????catch?(HibernateException?e)????????????{????????????????if?(tx?!=?null)?tx.Rollback();????????????????throw?e;????????????}????????????finally????????????{????????????????session.Close();????????????}????????????return?p;????????}????????public?void?DeleteRole(int?rid)????????{????????????ISession?session?=?_sessions.OpenSession();????????????ITransaction?tx?=?null;????????????try????????????{????????????????tx?=?session.BeginTransaction();????????????????Role?item?=?session.Load(typeof(Role),?rid)?as?Role;????????????????session.Delete(item);????????????????tx.Commit();????????????}????????????catch?(HibernateException?e)????????????{????????????????if?(tx?!=?null)?tx.Rollback();????????????????throw?e;????????????}????????????finally????????????{????????????????session.Close();????????????}????????}????}}UnitTest1.csusing?System;using?System.Text;using?System.Collections.Generic;using?Microsoft.VisualStudio.TestTools.UnitTesting;using?NhibernateSample1;namespace?TestProject1{????/**////?<summary>????///?UnitTest1?的摘要說明????///?</summary>????[TestClass]????public?class?UnitTest1????{????????public?UnitTest1()????????{????????????//????????????//?TODO:?在此處添加構造函數邏輯????????????//????????}????????NhibernateSample1.UserRolePermissionFixure?usf?=?new?UserRolePermissionFixure();????????其他測試屬性#region?其他測試屬性????????//????????//?您可以在編寫測試時使用下列其他屬性:????????//????????//?在運行類中的第一個測試之前使用?ClassInitialize?運行代碼????????//?[ClassInitialize()]????????//?public?static?void?MyClassInitialize(TestContext?testContext)?{?}????????//????????//?在類中的所有測試都已運行之后使用?ClassCleanup?運行代碼????????//?[ClassCleanup()]????????//?public?static?void?MyClassCleanup()?{?}????????//????????//?在運行每個測試之前使用?TestInitialize?運行代碼?????????//?[TestInitialize()]????????//?public?void?MyTestInitialize()?{?}????????//????????//?在運行每個測試之后使用?TestCleanup?運行代碼????????//?[TestCleanup()]????????//?public?void?MyTestCleanup()?{?}????????//????????#endregion????????[TestMethod]????????public?void?Test1()????????{????????????usf.Configure();????????????usf.ExportTables();????????????Role?r?=?usf.CreateRole("test");????????????Assert.IsTrue(r.RoleID?>?0);????????????User?u?=?usf.CreateUser(Guid.NewGuid().ToString(),?"ds",?r);????????????????????????Assert.IsTrue(u.Id?>?0);????????????Permission?p?=?usf.CreatePermission(r,?"查詢");????????????Assert.IsTrue(p.PermissionID?>?0);?????????????????}????}} 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