Spring+Ibatis处理1对多数据表的例子

数据库脚本（MYsqL）

 

create   table  Orders (OrderId  varchar ( 10 )  primary   key ,Customer  varchar ( 10 ));
create   table  OrderLines(OrderLineId  varchar ( 10 )  primary   key ,Product  varchar ( 10 ),OrderId  varchar ( 10 ),
                         foreign   key (OrderId)  references  Orders(OrderId));

insert   into  Orders  values (" 1 ","john");
insert   into  Orders  values (" 2 ","marry");

insert   into  OrderLines  values (" 1 ","computer"," 1 ");
insert   into  OrderLines  values (" 2 ","bike"," 1 ");
insert   into  OrderLines  values (" 3 ","cat"," 2 ");
insert   into  OrderLines  values (" 4 ","dog"," 2 ");
insert   into  OrderLines  values (" 5 ","basketball"," 2 ");

domain对象

 

package  ch10.SpringAndIbatisOneToMany;

import  java.io.Serializable;
import  java.util.ArrayList;
import  java.util.List;

public   class  Order  implements  Serializable ... {
   private String orderid;
   private String customer;

   private List orderLines;
public String getCustomer() ...{
    return customer;
}
public void setCustomer(String customer) ...{
    this.customer = customer;
}
public String getOrderid() ...{
    return orderid;
}
public void setOrderid(String orderid) ...{
    this.orderid = orderid;
}
public List getOrderLines() ...{
    return orderLines;
}
public void setOrderLines(List orderLines) ...{
    this.orderLines = orderLines;
}

}

 

package  ch10.SpringAndIbatisOneToMany;

import  java.io.Serializable;

public   class  OrderLine  implements  Serializable  ... {
   private String orderLineId;
   private String product;
   public OrderLine()...{
       
   }
public OrderLine(String orderLineId, String product) ...{
    super();
    this.orderLineId = orderLineId;
    this.product = product;
}
public String getOrderLineId() ...{
    return orderLineId;
}
public void setOrderLineId(String orderLineId) ...{
    this.orderLineId = orderLineId;
}
public String getProduct() ...{
    return product;
}
public void setProduct(String product) ...{
    this.product = product;
}
}

 

dao接口

 

package  ch10.SpringAndIbatisOneToMany;

import  java.util.List;

public   interface  IDAO  ... {
   public Object getOrderById(String id);
}

 

dao实现

 

package  ch10.SpringAndIbatisOneToMany;

import  java.util.List;

import  org.springframework.orm.ibatis.support.SqlMapClientDaoSupport;

public   class  TestDAO  extends  SqlMapClientDaoSupport  implements  IDAO  ... {

    public Object getOrderById(String id) ...{
        
        return this.getSqlMapClientTemplate().queryForObject("getOrderById",id);
    }

    
    

}

 

ibatis配置文件：

 

<? xml version="1.0" encoding="UTF-8" ?>  
<! DOCTYPE sqlMapConfig 
PUBLIC "-//iBATIS.com//DTD SQL Map Config 2.0//EN" 
"http://www.ibatis.com/dtd/sql-map-config-2.dtd" >  
< sqlMapConfig >  
< sqlMap  resource ="ch10/SpringAndIbatisOneToMany/Ibatis.xml"   />
</ sqlMapConfig >

 

ibatis sql map配置文件：

 

<? 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 >
     <!--  定义类的别名，以下配置中使用别名  -->
     < typeAlias  type ="ch10.SpringAndIbatisOneToMany.Order"  alias ="order" />
     < typeAlias  type ="ch10.SpringAndIbatisOneToMany.OrderLine"  alias ="order_line" />
    
      < resultMap  class ="order"  id ="result" >
        < result  property ="orderid"  column ="OrderId" />
        < result  property ="customer"  column ="Customer" />
        < result  property ="orderLines"  select ="getOrderLinesByOrder"  column ="OrderId" />
      </ resultMap >
     
      < resultMap  class ="order_line"  id ="resultLine" >
       < result  property ="orderLineId"  column ="orderLineId" />
        < result  property ="product"  column ="Product" />
      </ resultMap >
     
      < select  id ="getOrderLinesByOrder"  resultMap ="resultLine"  parameterClass ="string" > select orderLineId,Product from orderlines where orderid=#value# </ select >
     
      < select  id ="getOrderById"  resultMap ="result"  parameterClass ="string" > select OrderId,Customer,OrderId from Orders where OrderId=#value# </ select >
</ sqlMap >

 

Spring配置文件：

如果要使用1对1，1对多这样牵扯两个表的情况，一定要为SqlMapClientFactoryBean设置dataSource属性

 

<? xml version="1.0" encoding="UTF-8" ?>
< beans
     xmlns ="http://www.springframework.org/schema/beans"
    xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation ="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd" >


< bean  id ="dataSource"  class ="org.apache.commons.dbcp.BasicDataSource" >
   < property  name ="driverClassName" >
     < value > com.mysql.jdbc.Driver </ value >
   </ property >
   < property  name ="username" >
     < value > root </ value >
   </ property >
   < property  name ="password" >
     < value > 1234 </ value >
   </ property >
   < property  name ="url" >
     < value > jdbc:mysql://localhost:3306/spring </ value >
   </ property >
</ bean >

< bean  id ="sqlMapClient"  class ="org.springframework.orm.ibatis.SqlMapClientFactoryBean" >
   <!--  此处应注入ibatis配置文件，而非sqlMap文件，否则会出现“there is no statement.....异常”  -->
   < property  name ="configLocation" >
      < value > ch10/SpringAndIbatisOneToMany/sqlMapConfig.xml </ value >
   </ property >
   < property  name ="dataSource" >
    < ref  bean ="dataSource" />
  </ property >

</ bean >

< bean  id ="testDAO"  class ="ch10.SpringAndIbatisOneToMany.TestDAO" >
   < property  name ="dataSource" >
    < ref  bean ="dataSource" />
    </ property >
   < property  name ="sqlMapClient" >
     < ref  bean ="sqlMapClient" />
   </ property >
</ bean >

</ beans >

 

测试代码：

 

package  ch10.SpringAndIbatisOneToMany;

import  java.util.ArrayList;
import  java.util.Iterator;
import  java.util.List;

import  org.omg.PortableInterceptor.SYSTEM_EXCEPTION;
import  org.springframework.context.ApplicationContext;
import  org.springframework.context.support.ClassPathXmlApplicationContext;

import  ch10.SpringAndIbatis.Ibatis;

public   class  Test  ... {

    /** *//**
     * @param args
     */
    public static void main(String[] args) ...{
        ApplicationContext context=new ClassPathXmlApplicationContext("ch10/SpringAndIbatisOneToMany/applicationContext.xml");
        TestDAO testDAOImpl=(TestDAO)context.getBean("testDAO");

        Order order=(Order)testDAOImpl.getOrderById("1");
        
        System.out.println("Order info:");
        System.out.println(order.getCustomer());
        System.out.println("OrderLine info:");
        
        List result=order.getOrderLines();
    
        for (Iterator iter = result.iterator(); iter.hasNext();) ...{
            OrderLine element = (OrderLine) iter.next();
            System.out.println(element.getProduct());
            
        }
        
        
    }

}

 

结果：

Order info:
marry
OrderLine info:
cat
dog
basketball