【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));