【SSI开发总结.2】spring整合ibatis

 
1.Spring
配置文件：



<!-- 1.配置数据源 -->

<bean id="myDataSource"

   class="org.springframework.jdbc.datasource.DriverManagerDataSource">

   <property name="driverClassName"

    value="com.microsoft.jdbc.sqlserver.SQLServerDriver" />

   <property name="url"

    value="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=game" />

   <property name="username" value="sa" />

   <property name="password" value="123456" />

</bean>

<!-- 2.配置数据工厂(ibatis) -->

<bean id="myIbatis"

   class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">

   <property name="configLocation"

    value="/WEB-INF/ibatis-sql-map-config.xml" />

   <property name="dataSource" ref="myDataSource" />

</bean>

<!-- 3.DAO组件注入ibatis -->

 
<bean id="testDao" class="dao.TestDao">

   <property name="sqlMapClient" ref="myIbatis" />

</bean>

 
 
 
 
 
2.ibatis映射
文件



 

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

<!DOCTYPE sqlMap

   PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"

   "http://ibatis.apache.org/dtd/sql-map-2.dtd">

 
 
<sqlMap>

   
<typeAlias type=”
返回类型的类的路径” alias=”
类别名”>//
创建一个类型别名

 
   
<resultMap class=”
类别名” id=”result”>

       
<result property=”
属性名称” column=”
对应表的字段名”>

   
</resultMap>

//如果字段和POJO属性完全相同，resultClass="类别名"就可以了,并不需要定义resultMap节点

//不过，如果要定义表的关系特性，后面的介绍可以看出，还是需要定义resultMap节点的。

//如果包含参数，用parameterClass="java.lang.String"(基本类型)

//或者parameterClass="类别名"(类)就可以了

   
<select id =”getAll” resultMap=”result">

     
Select * from test

   
</select>

</sqlMap>

3.
所有持久化类都必须继承SqlMapClientDaoSupport
类



public class TestDao extends SqlMapClientDaoSupport

{

//
getSqlMapClientTemplate()
获得ibatis
的调用.它提供一系列方法方便调用SQL返回结果，或者更新数据

Public List getAll()

{

return getSqlMapClientTemplate().queryForList(“getAll”,null);

}

}

 

 
项目关系简单，并没有用到IBATIS的关系特性，以下为使用介绍：

 
4.
一对一关联



Eg
：

表结构

CustomerDetails

{

CustomerDetailId int not null,//
主建

Data varchar(255) not null

};

Customers

{

CustomerId int not null,//
主建

FirstName varchar(50) not null,

ListName varchar(50) not null,

CustomerDetailId int not null,//
为表CustomerDetails
的主建值

CustomerGossip int not null //
为表CustomerDetails
的主建值

}

 
属性javabean

Customer

{

Private int customerId;

Private String firstName;

Private String lastName;

Private CustomerDetail customerDetail;

Private CustomerDetail customerGossip;

}

 
CustomerDetail

{

Private int customerDetailId;

Private String data;

}

 
 
Ibatis
配置文件

<sqlMap>

<typeAlias type=”Customer” alias=”customer”>//
创建一个类型别名

<typeAlias type=”CustomerDetail” alias=”customerDetail”>

<resultMap class=”customer” id=”result”>

     
<result property=” customerId” column=” CustomerId”>

<result property=” firstName” column=” FirstName”>

<result property=” lastName” column=” LastName”>

</resultMap>

 
<resultMap class=”customerDetail” id=”gossipResult”>

     
<result property=” customerDetailId” column=” CustomerDetailId”>

<result property=” data” column=” Data”>

</resultMap>

 
<resultMap class=”customer” id=”resultDetail” extends=”result”>

//
设置CustomerDetail
对象的customerDetailId
属性

     
<result property=” customerDetail . customerDetailId” column=” CustomerDetailId”>

//
设置CustomerDetail
对象的data
属性

<result property=” customerDetail .data” column=” Data”>

//
获得的数据可能为空

<result property=” customerGossip” select=”getCustomerGossipById” column=” CustomerGossip” >

</resultMap>

 
<select id =” getCustomerById” resultMap=” resultDetail” ParameterClass=”int”>

Select c.CustomerId as CustomerId,c.FirstName as FirstName,c.LastName as LastName ,c.customerDetail
as
CustomerDetail ,c.customerGossip as CustomerGossip, cd.CustomerDetailId
as CustomerDetailId , cd.Data as Data from Customer c,CustomerDetails
cd, wherec. CustomerDetailId =cd. CustomerDetailId and
CustomerDetailId=##

</select>

 
<select id =” getCustomerGossipById” resultMap=” gossipResult” ParameterClass=”int”>

     
Select * from CustomerDetails where CustomerDetailId=##

</select>

</sqlMap>

 
Dao
类调用

Return(Customer)getSqlMapClientTemplate().queryForObject(“getCustomerById”,new integer(1));

 
5.
一对多关联



Eg:
一个Order
对应多个Lines

Order

{

   
OrderId int not null

   
Customer int not null

}

 
Lines

{

   
OrderLineId int not null,

   
OrderId int not null,

   
Product varchar(255) not null,

   
Price decimal(10,2) not null

}

 
属性javabean

Order

{

   
Private int orderId
；

   
Private int customer
；

   
Private List orderLines

}

 
OrderLine

{

   
Private int orderLineId
；

   
Private int orderId
；

   
Private String produce
；

   
Private BigDecimal price
；

}

 
配置文件

<resultMap class=”Order” id=”resultOrder”>

   
<result property name=”orderId” column=”OrderId”>

   
<result property name=”customer” column=”Customer”>

   
<result property name=”orderLines” select=”getOrderLineByOrder” column=”OrderId”>

</resultmap>

 
<resultMap class=”OrderLine” id=”resultOrderLine”>

   
<result property name=”orderLineId” column=”OrderLineId”>

   
<result property name=”orderId” column=”OrderId”>

<result property name=”product” column=”Product”>

<result property name=”price” column=”Price”>

</resultmap>

 
<select id=”getOrder” resultmap=”resultOrder” parameterClass=”int”>

   
Select * from Orders where OrderId=##

</select>

 
<select id=” getOrderLineByOrder” resultmap=”resultOrder” parameterClass=”int”>

   
Select * from OrderLines where OrderId=##

</select>

 
Dao
调用



Return (Order)getSqlMapClientTemplate().queryForObject(“getOrder”,new Integer(1));