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園子里面的兄弟們好，由于工作和身體的原因，幾天來(lái)都沒(méi)有寫(xiě)有關(guān)nhibernate學(xué)習(xí)系列了。看了看前幾篇大家的回復(fù)，首先想要多謝兄弟們對(duì)小弟的關(guān)注和支持，可小弟水平有限，寫(xiě)出來(lái)的也只是入門(mén)級(jí)的心得。只是有一個(gè)心愿，那就是拋磚引玉，希望能和大家更多更好的互動(dòng)。技術(shù)無(wú)極限，而我更想要得是能在園子里面認(rèn)識(shí)更多的兄弟，更多的朋友。對(duì)了，忘記了一點(diǎn)事情，那就是，兄弟們，節(jié)日快樂(lè)，哈哈哈。。。唧唧歪歪這么多，大家不要見(jiàn)笑，下面進(jìn)入正題
1) 學(xué)習(xí)目標(biāo)
通過(guò)進(jìn)一步學(xué)習(xí)Nhibernate基礎(chǔ)知識(shí)，掌握用Nhiberate實(shí)現(xiàn)對(duì)級(jí)聯(lián)的支持，通過(guò)一個(gè)簡(jiǎn)單的用戶角色權(quán)限系統(tǒng)來(lái)體驗(yàn)nhibernate對(duì)級(jí)聯(lián)的強(qiáng)大支持。

2）開(kāi)發(fā)環(huán)境和必要準(zhǔn)備
開(kāi)發(fā)環(huán)境為:windows 2003,Visual studio .Net 2005,Sql server 2005 developer edition
必要準(zhǔn)備：學(xué)習(xí)前三篇nhibernate學(xué)習(xí)系列 Nhibernate學(xué)習(xí)之起步篇-1 , Nhibernate學(xué)習(xí)起步之many-to-one篇 , Nhibernate學(xué)習(xí)之many-to-many篇

3)示例
業(yè)務(wù)需求：實(shí)現(xiàn)一個(gè)用戶角色權(quán)限系統(tǒng)，一個(gè)用戶只有一個(gè)角色，一個(gè)角色下有多個(gè)用戶，一個(gè)角色下有多個(gè)權(quán)限，一個(gè)權(quán)限也對(duì)應(yīng)多個(gè)角色
要求: (1).創(chuàng)建一個(gè)角色 (2)在該角色上創(chuàng)建兩個(gè)個(gè)用戶3)創(chuàng)建兩個(gè)權(quán)限4)指定該角色上的權(quán)限列表5)獲得一個(gè)用戶的權(quán)限列表
首先看關(guān)系數(shù)據(jù)庫(kù)關(guān)系圖:

nhibernate學(xué)習(xí)之三級(jí)聯(lián)(Ternary Associations)篇

4)實(shí)現(xiàn)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(hào)

/// </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 RoleRole

{

get

{

return _role;

}

set

{

_role = value;

}

User.hbm.xml

<? xmlversion = " 1.0 " encoding = " utf-8 " ?>

< hibernate - mappingxmlns = " urn:nhibernate-mapping-2.2 " >

< class name = " NhibernateSample1.User,NhibernateSample1 " table = " Users " lazy = " false " >

< idname = " Id " column = " Id " unsaved - value = " 0 " >

< generator class = " native " />

</ id >

< propertyname = " Name " column = " Name " type = " string " length = " 64 " not - null = " true " unique = " true " ></ property >

< propertyname = " Pwd " column = " Pwd " type = " string " length = " 64 " not - null = " true " ></ property >

< many - to - onename = " Role " class = " NhibernateSample1.Role,NhibernateSample1 " column = " RoleID " ></ many - to - one >

</ class >

</ hibernate - mapping >

2.Role.cs

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 IListPermissionList

{

get

{

return _permissionList;

}

set

{

_permissionList = value;

}

public virtual int RoleID

{

get

{

return _roleID;

}

set

{

_roleID = value;

}

public virtual IListUserList

{

get

{

return _list;

}

set

{

_list = value;

}

public virtual string RoleName

{

get

{

return _roleName;

}

set

{

_roleName = value;

}

Role.hbm.xml

<? xmlversion = " 1.0 " encoding = " utf-8 " ?>

< hibernate - mappingxmlns = " urn:nhibernate-mapping-2.2 " >

< class name = " NhibernateSample1.Role,NhibernateSample1 " table = " Roles " lazy = " false " >

< idname = " RoleID " column = " RoleID " unsaved - value = " 0 " >

< generator class = " native " />

</ id >

< propertyname = " RoleName " column = " RoleName " type = " string " length = " 64 " not - null = " true " ></ property >

< bagname = " PermissionList " table = " Role_Permissions " inverse = " true " lazy = " false " cascade = " all " >

< keycolumn = " RoleID " />

< many - to - many class = " NhibernateSample1.Permission,NhibernateSample1 " column = " PermissionID " ></ many - to - many >

</ bag >

< bagname = " UserList " table = " Users " inverse = " true " lazy = " false " cascade = " all " >

< keycolumn = " RoleID " />

< one - to - many class = " NhibernateSample1.User,NhibernateSample1 " ></ one - to - many >

</ bag >

</ class >

</ hibernate - mapping >

3.Permission.cs

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 IListRoleList

{

get

{

return _roleList;

}

set

{

_roleList = value;

}

Permission.hbm.xml

<? xmlversion = " 1.0 " encoding = " utf-8 " ?>

< hibernate - mappingxmlns = " urn:nhibernate-mapping-2.2 " >

< class name = " NhibernateSample1.Permission,NhibernateSample1 " table = " Permissions " lazy = " false " >

< idname = " PermissionID " column = " PermissionID " unsaved - value = " 0 " >

< generator class = " native " />

</ id >

< propertyname = " PermissionName " column = " PermissionName " type = " string " length = " 64 " not - null = " true " unique = " true " ></ property >

< bagname = " RoleList " table = " Role_Permissions " lazy = " true " >

< keycolumn = " PermissionID " />

< many - to - many class = " NhibernateSample1.Role,NhibernateSample1 " column = " RoleID " ></ many - to - many >

</ bag >

</ class >

</ hibernate - mapping >

4。數(shù)據(jù)操作類

UserRolePermissionFixure

using 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()

{

Configurationcfg = GetConfiguration();

_sessions = cfg.BuildSessionFactory();

}

ConfigurationGetConfiguration()

{

string cfgPath = @" E:/myproject/nhibernatestudy/simle1/NHibernateStudy1/NhibernateSample1/hibernate.cfg.xml " ;

Configurationcfg = new Configuration().Configure(cfgPath);

return cfg;

}

public void ExportTables()

{

Configurationcfg = GetConfiguration();

new SchemaExport(cfg).Create( true , true );

}

public RoleCreateRole( string roleName)

{

Roler = new Role();

r.RoleName = roleName;

ISessionsession = _sessions.OpenSession();

ITransactiontx = null ;

try

{

tx = session.BeginTransaction();

session.Save(r);

tx.Commit();

}

catch (Exceptione)

{

if (tx != null )tx.Rollback();

throw e;

}

finally

{

session.Close();

}

return r;

}

public UserCreateUser(Stringname, string pwd,Roler)

{

Useru = new User();

u.Name = name;

u.Pwd = pwd;

u.Role = r;

// r.UserList.Add(u);

ISessionsession = _sessions.OpenSession();

ITransactiontx = null ;

try

{

tx = session.BeginTransaction();

session.Save(u);

tx.Commit();

}

catch (HibernateExceptione)

{

if (tx != null )tx.Rollback();

throw e;

}

finally

{

session.Close();

}

return u;

}

public PermissionCreatePermission(Roler, string name)

{

Permissionp = new Permission();

p.PermissionName = name;

r.PermissionList.Add(p);

p.RoleList.Add(r);

ISessionsession = _sessions.OpenSession();

ITransactiontx = null ;

try

{

tx = session.BeginTransaction();

session.Save(p);

tx.Commit();

}

catch (HibernateExceptione)

{

if (tx != null )tx.Rollback();

throw e;

}

finally

{

session.Close();

}

return p;

}

public void DeleteRole( int rid)

{

ISessionsession = _sessions.OpenSession();

ITransactiontx = null ;

try

{

tx = session.BeginTransaction();

Roleitem = session.Load( typeof (Role),rid) as Role;

session.Delete(item);

tx.Commit();

}

catch (HibernateExceptione)

{

if (tx != null )tx.Rollback();

throw e;

}

finally

{

session.Close();

}

5。單元測(cè)試類

UnitTest1.cs

using System;

using System.Text;

using System.Collections.Generic;

using Microsoft.VisualStudio.TestTools.UnitTesting;

using NhibernateSample1;

namespace TestProject1

{

/// <summary>

/// UnitTest1的摘要說(shuō)明

/// </summary>

[TestClass]

public class UnitTest1

{

public UnitTest1()

{

// TODO:在此處添加構(gòu)造函數(shù)邏輯

}

NhibernateSample1.UserRolePermissionFixureusf = new UserRolePermissionFixure();

其他測(cè)試屬性

[TestMethod]

public void Test1()

{

usf.Configure();

usf.ExportTables();

Roler = usf.CreateRole( " test " );

Assert.IsTrue(r.RoleID > 0 );

Useru = usf.CreateUser(Guid.NewGuid().ToString(), " ds " ,r);

Assert.IsTrue(u.Id > 0 );

Permissionp = usf.CreatePermission(r, " 查詢 " );

Assert.IsTrue(p.PermissionID > 0 );

}

通過(guò)本篇的學(xué)習(xí)，將充分理解到nhibernate對(duì)級(jí)聯(lián)支持的強(qiáng)大。另外除了支持三級(jí)聯(lián)之外，他還支持異類關(guān)聯(lián)(Heterogeneous Associations) .給開(kāi)發(fā)帶來(lái)了更多的靈活性和實(shí)用性。而且考慮到性能的問(wèn)題，還添加了lazy這樣的延遲加載的功能，加載父親不必要一定要加載他的兒子集合。通過(guò)集合類映射，nhinernate輕松實(shí)現(xiàn)級(jí)聯(lián)，這相比較代碼生成來(lái)說(shuō)，無(wú)疑是一個(gè)優(yōu)點(diǎn)。

nhibernate學(xué)習(xí)之三級(jí)聯(lián)(Ternary Associations)篇

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