Spring+Ibatis处理1对1数据表的例子

数据库结构（mysql）

 

create   table  customerDetail(CustomerDetailId  varchar ( 10 )  primary   key ,DataDetail  varchar ( 10 ));
create   table  customers(id  varchar ( 10 )  primary   key ,
                      firstname  varchar ( 10 ),
                      lastname  varchar ( 10 ),
                      customerDetail  varchar ( 10 ),
                      customerGross  varchar ( 10 ),
                       foreign   key  (customerDetail)  references   customerDetail(CustomerDetailId),
                       foreign   key  (customerGross)  references   customerDetail(CustomerDetailId));
insert   into  customerdetail  values (" 1 ","detail1");
insert   into  customerdetail  values (" 2 ","detail2");
insert   into  customerdetail  values (" 3 ","detail3");
insert   into  customers  values (" 1 ","firstname1","lastname1"," 1 ", null );
insert   into  customers  values (" 2 ","firstname2","lastname2"," 2 "," 3 ");

customer和customerDetail是1对1的关系
customer和customerGossIp是1对1的关系

 domain对象：

 

package  ch10.SpringAndIbatisOneToOne;

import  java.util.List;

public   class  Customers  ... {
   private String customerId;
   private String firstName;
   private String lastName;
   private CustomerDetail customerDetail;
   private CustomerDetail customerGossIp;
public CustomerDetail getCustomerDetail() ...{
    return customerDetail;
}
public void setCustomerDetail(CustomerDetail customerDetail) ...{
    this.customerDetail = customerDetail;
}
public CustomerDetail getCustomerGossIp() ...{
    return customerGossIp;
}
public void setCustomerGossIp(CustomerDetail customerGossIp) ...{
    this.customerGossIp = customerGossIp;
}
public String getCustomerId() ...{
    return customerId;
}
public void setCustomerId(String customerId) ...{
    this.customerId = customerId;
}
public String getFirstName() ...{
    return firstName;
}
public void setFirstName(String firstName) ...{
    this.firstName = firstName;
}
public String getLastName() ...{
    return lastName;
}
public void setLastName(String lastName) ...{
    this.lastName = lastName;
}


}


package  ch10.SpringAndIbatisOneToOne;

public   class  CustomerDetail  ... {
   private String customerDetailId;
   private String dataDetail;
public String getCustomerDetailId() ...{
    return customerDetailId;
}
public void setCustomerDetailId(String customerDetailId) ...{
    this.customerDetailId = customerDetailId;
}
public String getDataDetail() ...{
    return dataDetail;
}
public void setDataDetail(String dataDetail) ...{
    this.dataDetail = dataDetail;
}

}

 

DAO接口：

 

package  ch10.SpringAndIbatisOneToOne;

import  java.util.List;

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

 

DAO实现类：

 

package  ch10.SpringAndIbatisOneToOne;

import  java.util.List;

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

public   class  TestDAO  extends  SqlMapClientDaoSupport  implements  IDAO  ... {

    public Object getCustomersById(String id) ...{
    
        return this.getSqlMapClientTemplate().queryForObject("getCustomerById",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/SpringAndIbatisOneToOne/Ibatis.xml "   />  

</ sqlMapConfig >

 

ibatis sql map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.SpringAndIbatisOneToOne.Customers"  alias ="customer" />
     < typeAlias  type ="ch10.SpringAndIbatisOneToOne.CustomerDetail"  alias ="customerDetail" />
    
     <!--  定义基本的resultMap  -->
     < 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 ="gossipDetail" >
       < result  property ="customerDetailId"  column ="CustomerDetailId" />
       < result  property ="dataDetail"  column ="DataDetail" />
     </ resultMap >
    
    
     <!--  使用如下这种集成关系的好处是我们可以只返回我们需要的数据，而不是总返回全部数据
         比如我们只关心customer，而不关心他其中的customerDetail和customerGossIp,那我们之用
         名为result的resultMap就可以了  -->  
    
     <!--  定义符合resultMap,这种配置表明了customer的customerDetail不能为空，而customerGross可以为空 > -->
     < resultMap  class ="customer"  id ="resultDetail"  extends ="result" >
        < result  property ="customerDetail.customerDetailId"  column ="CustomerDetailID" />
        < result  property ="customerDetail.dataDetail"  column ="DataDetail" />
         < result  property ="customerGossIp"  column ="CustomerGossIp"  select ="getCustomerGossById" />  
     </ resultMap >
    
    
     < select  id ="getCustomerGossById"  resultMap ="gossipDetail"  parameterClass ="string" >
         select CustomerDetailId,DataDetail from CustomerDetail where CustomerDetailId=#value#     
     </ select >
    
     <!--  根据customerid获得Customer -->

   
     < select  id ="getCustomerById"  resultMap ="resultDetail"  parameterClass ="string" >
     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.Datadetail as DataDetail
      from customers c 
      inner join customerdetail cd  on c.CustomerDetail=cd.CustomerDetailId 
      where c.CustomerId=#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/SpringAndIbatisOneToOne/sqlMapConfig.xml </ value >
   </ property >
     < property  name ="dataSource" >
    < ref  bean ="dataSource" />
  </ property >

</ bean >

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

</ beans >

 

测试代码：

 

package  ch10.SpringAndIbatisOneToOne;

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

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/SpringAndIbatisOneToOne/applicationContext.xml");
        TestDAO testDAOImpl=(TestDAO)context.getBean("testDAO");

        Customers result1=(Customers)testDAOImpl.getCustomersById("1");
    
        Customers result2=(Customers)testDAOImpl.getCustomersById("2");
        
    
      
         System.out.println(result1.getFirstName()+"-"+result1.getLastName()+"-"+result1.getCustomerDetail().getDataDetail()+"-"+result1.getCustomerGossIp().getDataDetail());
      
         System.out.println("-----------------");
      
         System.out.println(result2.getFirstName()+"-"+result2.getLastName()+"-"+result2.getCustomerDetail().getDataDetail()+"-"+result2.getCustomerGossIp().getDataDetail());
        
    }

}

 

结果：

firstname1-lastname1-detail1-detail2
-----------------
firstname2-lastname2-detail2-detail3