MySql（二）_NHibernateHelper管理会话工厂

1.定义接口的好处：

（1） 清楚的看到里面有哪些方法；

　( 2 )  可以更换实现类；Nhibernate实现件可以更换；

Manger文件夹（另外两个是Model、Mappings文件夹）

首先Model文件内，（对象）类名，对应着数据库中的表名；在类中定义属性（即对应表中的列名）

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace NBOWeb.Model
 {
     class Unity
     {
         public virtual int Id { get; set; }

         public virtual string Name { get; set; }

         public virtual int Age { get; set; }

         public virtual int WorkAge { get; set; }

     }
 }

在Mappings文件夹内，存放的是Model中所建立的类（对应的是数据库中的表）的配置文件，将所有的类中的属性与数据库中的表中的列名真正对应起来。注意Model中的类名与Mapping中的解析文件名一一对应。 “unity.cs”与表名一致，“unity.cs”与“unity.hbm.xml”一致。

 <?xml version="1.0" encoding="utf-8" ?>
 <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
                    assembly="NBOWeb"
                    namespace="NBOWeb.Model">
   <!--assembly= Sikiedu 这是程序集的名称  namespace 是指User在哪个命名空间下的   -->

   <class name="Unity" table="unity">
     <id name="Id" column="id" type="Int32">
       <generator class="native"></generator>
       <!--自动增涨-->
       <!--nativ 是本地 使用数据库自带的生成器-->
     </id>
     <property name="Name" column ="name" type="String" ></property>
     <property name="Age" column ="age" type="Int32" ></property>
     <property name="WorkAge" column ="workage" type="Int32" ></property>

   </class>

 </hibernate-mapping>

Manager文件夹中，存放的是接口与接口的实现，“IUnityManger.cs”和“UnityManager.cs”           "IUnityManager.cs"存放的是各种要实现的方法或功能； “UnityManager”存放的是这些方法怎么具体实现的。

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using NBOWeb.Model;

 namespace NBOWeb.Manger
 {
     interface IUnityManager
     {
         void Add(Unity unity);
         void Update(Unity unity);
         void Remove(Unity unity);
         Unity GetById(int id);
         Unity GetByName(string name);                 //先定义出来有哪些操作

         ICollection<Unity> GetAllUnityCollection();

         bool VerifyUnity(string name, int age);
     }
 }

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Xml;
 using NBOWeb.Model;
 using NHibernate;
 using NHibernate.Criterion;

 namespace NBOWeb.Manger
 {
     class UnityManger : IUnityManager
     {

         public void Add(Unity unity)
         {
             //ISession session = NHibernateHelper.OpenSession();
             //session.Save(unity);
             //session.Close();

             //ISession session = NHibernateHelper.OpenSession()                     //当使用OpenSession方法的时候，将SessionFactory属性  中字段可读get创建           “属性”的加强
             using (ISession session = NHibernateHelper.OpenSession()) //需要释放的资源   using的用法
             {
                 using (ITransaction transaction = session.BeginTransaction())
                 {
                     session.Save(unity);
                     transaction.Commit();
                 }
             } //自动实现资源的释放
         }

         public ICollection<Unity> GetAllUnityCollection()
         {
             using (ISession session = NHibernateHelper.OpenSession()) //需要释放的资源   using的用法
             {
                 //ICriteria criteria = session.CreateCriteria(typeof(Unity));                      // criteria标准
                 //criteria.Add(Restrictions.Eq("Name",name));                                      //更新，根据主键来操作  Restrictions限制约束，严格相等
                 //                                                                                 //将查询条件封装成了对象
                 //Unity unity = criteria.UniqueResult<Unity>();                                    //调用唯一的结果,  //只会取到查询结果的第一行记录

                 IList<Unity> unity = session.CreateCriteria(typeof(Unity)).List<Unity>();
                 return unity;
             }
         }

         public Unity GetById(int id)
         {
             using (ISession session = NHibernateHelper.OpenSession()) //需要释放的资源   using的用法
             {
                 using (ITransaction transaction = session.BeginTransaction())
                 {
                     Unity unity = session.Get<Unity>(id); //更新，根据主键来操作
                     transaction.Commit();
                     return unity;
                 }
             }
         }

         public Unity GetByName(string name)
         {
             using (ISession session = NHibernateHelper.OpenSession()) //需要释放的资源   using的用法
             {
                 //ICriteria criteria = session.CreateCriteria(typeof(Unity));                      // criteria标准
                 //criteria.Add(Restrictions.Eq("Name",name));                                      //更新，根据主键来操作  Restrictions限制约束，严格相等
                 //                                                                                 //将查询条件封装成了对象
                 //Unity unity = criteria.UniqueResult<Unity>();                                    //调用唯一的结果

                 Unity unity = session.CreateCriteria(typeof(Unity)).Add(Restrictions.Eq("Name", name))
                     .UniqueResult<Unity>();
                 return unity;
             }
         }

         public void Remove(Unity unity)
         {
             using (ISession session = NHibernateHelper.OpenSession()) //需要释放的资源   using的用法
             {
                 using (ITransaction transaction = session.BeginTransaction())
                 {
                     session.Delete(unity); //更新，根据主键来操作
                     transaction.Commit();
                 }
             }
         }

         public void Update(Unity unity)
         {
             using (ISession session = NHibernateHelper.OpenSession()) //需要释放的资源   using的用法
             {
                 using (ITransaction transaction = session.BeginTransaction())
                 {
                     session.Update(unity); //更新，根据主键来操作
                     transaction.Commit();
                 }
             }
         }

         public bool VerifyUnity(string name, int age)
         {
             using (ISession session = NHibernateHelper.OpenSession()) //需要释放的资源   using的用法
             {

                 Unity unity = session
                     .CreateCriteria(typeof(Unity))                                     //建立unity标准格式
                     .Add(Restrictions.Eq("Name", name))                                //添加条件约束
                     .Add(Restrictions.Eq("Age", age))
                     .UniqueResult<Unity>();                                           //主键            加深对“主键”的理解
                 if (unity==null)
                 {
                     return false;
                 }
                 else
                 {
                     return true;
                 }

             }
         }
     }
 }

NHibernateHelper.cs

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using NHibernate;
 using NHibernate.Cfg;

 namespace NBOWeb
 {
     class NHibernateHelper
     {

             private static ISessionFactory _sessionFactory;

         private static ISessionFactory SessionFactory
         {
             get
             {
                 if (_sessionFactory==null)
                 {
                     var configuration=new Configuration();
                     configuration.Configure();
                     configuration.AddAssembly("NBOWeb");

                     _sessionFactory = configuration.BuildSessionFactory();
                 }
                 return _sessionFactory;
             }
         }

         public static ISession OpenSession()
         {
             return SessionFactory.OpenSession();
         }

     }
 }

接口，具体在进行学习。

总的运行

 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using NHibernate;
 using NHibernate.Cfg;
 using NBOWeb.Model;
 using NBOWeb.Manger;

 namespace MySql_StudyTest
 {
     class Program
     {
         static void Main(string[] args)
         {
             //var configuration=new Configuration();
             //configuration.Configure();
             //configuration.AddAssembly("NBOWeb");
             //ISessionFactory sessionFactory = null;
             //ITransaction transaction = null;
             //ISession session = null;
             //try
             //{
             //    sessionFactory = configuration.BuildSessionFactory();
             //    session = sessionFactory.OpenSession();

             //    //Unity unity = new Unity() {Name = "L.Juhnko", Age = 29, WorkAge = 10  };
             //    //session.Save(unity);

             //    //事务，对数据库更改
             //    transaction= session.BeginTransaction();//开启事务
             //    Unity unity1 = new Unity() { Name = "ko01", Age = 29, WorkAge = 10 };
             //    Unity unity2 = new Unity() { Name = "ko02", Age = 29, WorkAge = 10 };

             //    session.Save(unity1);
             //    session.Save(unity2);
             //    transaction.Commit();//事务提交
             //}
             //catch (Exception e)
             //{
             //    Console.WriteLine(e);

             //}
             //finally

             //{
             //    if (transaction!=null)
             //    {
             //        transaction.Dispose();
             //    }

             //    if (session!=null)
             //    {
             //        session.Close();
             //    }
             //    if (sessionFactory!=null)
             //    {
             //        sessionFactory.Close();
             //    }
             //}

             //Unity unity=new Unity()  { Id=0};        //创建一个Unity的对象
             //IUnityManager unityManager=new UnityManger();        //接口的应用            “接口” //此时与数据库未发生链接
             ////unityManager.Add(unity);

             ////unityManager.Update(unity);
             //unityManager.Remove(unity);

             //IUnityManager unityManager = new UnityManger();
             //Unity unity = unityManager.GetById(23);

             //Console.WriteLine("");
             //Console.WriteLine(unity.Id);
             //Console.WriteLine(unity.Name);
             //Console.WriteLine(unity.Age);
             //Console.WriteLine(unity.WorkAge);
             //Console.ReadKey();

             //IUnityManager unityManager=new UnityManger();
             //Unity unity = unityManager.GetByName("juhnko");

             //Console.WriteLine("");
             //Console.WriteLine(unity.Id);
             //Console.WriteLine(unity.Name);
             //Console.WriteLine(unity.Age);
             //Console.WriteLine(unity.WorkAge);
             //Console.ReadKey();

             //IUnityManager unityManager = new UnityManger();
             //ICollection<Unity> unity= unityManager.GetAllUnityCollection();
             //foreach (var u in unity)
             //{
             //    Console.WriteLine("用户名：{0}" + "\t" + "Id:{1}" + "\t" + "年龄：{2}" + "\t" + "工作年龄：{3}"+ "\n", u.Name, u.Id, u.Age, u.WorkAge);
             //}
             //Console.ReadKey();

             IUnityManager unityManager = new UnityManger();
             Console.WriteLine(unityManager.VerifyUnity("juhnko",));

             Console.ReadKey();

         }
     }
 }