MyBatis.Net 配置_.NET_编程开发_程序员俱乐部

假设我们现在有这样的需求，要对学生信息进行管理

学生表有要以下要求

字段名称

数据类型

说明

stuNo

字符

学号，该列必填，为主键递增

stuName

字符

学生姓名，该列必填，要考虑姓氏可能是两个字的，如欧阳俊雄

stuSex

字符

学生性别，该列必填，且只能是“男”或“女”。因为男生较多，默认为“男”

stuAge

数字

学生年龄，该列必填，必须在15～50岁之间

stuSeat

数字

学生的座位号

stuAddress

字符

学生地址，该列可不填，如没有填写，默认为“地址不详”

1. – 创建表[student_tb]

create table student_tb (
      StuNo int identity(1,1) primary key,
      StuName varchar(10) not null,
      StuSex varchar(5)  check(StuSex in('男','女')) default('男'),
      StuAge int check (StuAge between 15 and 50) not null,
      StuSeat int not null,
      StuAddress varchar (20) default('地址不详'),
    );

2. –创建实体

public class StudentInfo
    {
        public int StuNo { get; set; }

        public string StuName { get; set; }

        public string StuSex { get; set; }

        public int StuAge { get; set; }

        public int StuSeat { get; set; }

        public string StuAddress { get; set; }
    }

3. – 创建SqlMapper Provider

创建SqlMapper的方式有以下几种

a. 第一种方式

ISqlMapper _sqlMapper=IBatisNet.DataMapper.Mapper.Instance()

注:此种方式要求SqlMap.config文件位于应用程序根目录下，且文件名是且仅是”SqlMap.config”。

b. 第二种方式

ISqlMapper _sqlMapper=new DomSqlMapBuilder().Configure()

注：同上

c. 第三种方式——指定SqlMap.config的路径(使用EmbededResource查找config资源时，要求SqlMap.config生成操作属性为嵌入的资源)

XmlDocument sqlMapConfig = Resources.GetEmbeddedResourceAsXmlDocument("Config.SqlMap.config, Persistence");

ISqlMapper _sqlMapper = new DomSqlMapBuilder().Configure(sqlMapConfig); //---第三种

MyBatisProvider代码如下:

public class MyBatisProvider
    {
        private static ISqlMapper _sqlMapper;
        private static object sysncObj = new object();
        public static ISqlMapper GetInstanse()
        {
            if (_sqlMapper == null)
            {
                lock (sysncObj)
                {
                    if (_sqlMapper == null)
                    {
                        //_sqlMapper = IBatisNet.DataMapper.Mapper.Instance();//---第一种

                        //_sqlMapper = new DomSqlMapBuilder().Configure(); //---第二种

                        XmlDocument sqlMapConfig = Resources.GetEmbeddedResourceAsXmlDocument("MyBatis.SqlMap.config, MyBatis");

                        _sqlMapper = new DomSqlMapBuilder().Configure(sqlMapConfig);  //---第三种

                    }
                }
            }
            return _sqlMapper;
        }
    }

4. –在项目中

添加配置文件

a. provider.config

在网上一搜一大把。

<?xml version="1.0" encoding="utf-8"?>
<providers
xmlns="http://ibatis.apache.org/providers"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

  <clear/>
  <provider
   name="sqlServer4.0"
   enabled="true"
   description="Microsoft SQL Server, provider V4.0.0.0 in framework .NET V4.0"
   assemblyName="System.Data, Version=4.0.0.0, Culture=Neutral, PublicKeyToken=b77a5c561934e089"
   connectionClass="System.Data.SqlClient.SqlConnection"
   commandClass="System.Data.SqlClient.SqlCommand"
   parameterClass="System.Data.SqlClient.SqlParameter"
   parameterDbTypeClass="System.Data.SqlDbType"
   parameterDbTypeProperty="SqlDbType"
   dataAdapterClass="System.Data.SqlClient.SqlDataAdapter"
   commandBuilderClass=" System.Data.SqlClient.SqlCommandBuilder"
   usePositionalParameters = "false"
   useParameterPrefixInSql = "true"
   useParameterPrefixInParameter = "true"
   parameterPrefix="@"
   allowMARS="false"
    />
</providers>

b. SqlMap.config

<?xml version="1.0" encoding="utf-8"?>
<sqlMapConfig xmlns="http://ibatis.apache.org/dataMapper" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <settings>
    <setting useStatementNamespaces="true"/>
    <setting cacheModelsEnabled="true"/>
  </settings>

  <providers embedded="MyBatis.providers.config,MyBatis"/>

  <database>
    <provider name="sqlServer4.0"/>
    <dataSource name="dataSourceName" connectionString="连接语句"/>
  </database>
  <sqlMaps>
    <sqlMap embedded="MyBatis.SqlMaps.StudentInfo.xml,MyBatis"/>
  </sqlMaps>
</sqlMapConfig>

按照代码中的创建实例方式选择不同的位置及名称

注: <setting useStatementNamespaces="true"/>  true表示statementName要使用Namespace ，即实体映射XML中的namespace属性

sqlMaps节点下为实体映射XML文件路径

embedded表示文件的属性生成操作为嵌入的资源

5. –创建实体映射文件

<?xml version="1.0" encoding="utf-8" ?>

<sqlMap namespace="StudentInfo" xmlns="http://ibatis.apache.org/mapping"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <alias>
    <typeAlias alias="StudentInfo" type="Model.StudentInfo,Model" />
  </alias>
  <resultMaps>
    <resultMap id="StudentResult" class="StudentInfo">
      <result property="StuNo" column="stuNo"/>
      <result property="StuName" column="stuName"/>
      <result property="StuSex" column="stuSex"/>
      <result property="StuAge" column="stuAge"/>
      <result property="StuSeat" column="stuSeat"/>
      <result property="StuAddress" column="stuAddress"/>
    </resultMap>
  </resultMaps>
  <statements>
    <insert id="Insert" parameterClass="StudentInfo" resultClass="int">
      INSERT INTO [student_tb]([stuName],[stuSex],[stuAge],[stuSeat],[stuAddress])
      VALUES(#StuName#,#StuSex#,#StuAge#,#StuSeat#,#StuAddress#)
      <selectKey property="StuNo" resultClass="int" type="post" >
        SELECT @@identity AS StuNo
      </selectKey>
    </insert>
    <delete id="Delete" parameterClass="Int32">
      UPDATE [student_tb]
      SET [stuName] = #StuName#,[stuSex] = #StuSex#,[stuAge] = #StuAge#,[stuSeat] = #StuSeat#,[stuAddress] = #StuAddress#
      WHERE [stuNo]=#StuNo#
    </delete>
    <update id="Update" parameterClass="StudentInfo">
      UPDATE [student_tb]
      SET [stuName] = #StuName#,[stuSex] = #StuSex#,[stuAge] = #StuAge#,[stuSeat] = #StuSeat#,[stuAddress] = #StuAddress#
      WHERE [stuNo]=#StuNo#
    </update>    
    <select id="Get" parameterClass="Int32" resultMap="StudentResult">
      select * from [student_tb] where stuNo=#StuNo#
    </select>    
    <select id="List" parameterClass="map" resultMap="StudentResult">
      select * from [student_tb]
    </select>
  </statements>
</sqlMap>

如上，为一个简单的XML实体映射文件。

通过resultMaps节点，将实体属性与数据库字段对应起来。statements中再写增删改查等相关的操作节点及SQL

6. –DAL操作数据库

public class StudentDAL
    {
        public int Insert(StudentInfo info)
        {
            string stmtName = "StudentInfo.Insert";

            return Convert.ToInt32(MyBatisProvider.GetInstanse().Insert(stmtName, info) ?? "0");
        }

        public int Update(StudentInfo info)
        {
            string stmtName = "StudentInfo.Update";

            return MyBatisProvider.GetInstanse().Update(stmtName, info);
        }

        public StudentInfo Get(int id)
        {
            string stmtName = "StudentInfo.Get";

            return MyBatisProvider.GetInstanse().QueryForObject<StudentInfo>(stmtName, id);
        }

        public IList<StudentInfo> List()
        {
            string stmtName = "StudentInfo.List";

            return MyBatisProvider.GetInstanse().QueryForList<StudentInfo>(stmtName, null);
        }
    }

示例代码: