Spring整合Mybatis

1、采用数据映射器（MapperFactoryBean）的方式，不用写mybatis映射文件，采用注解方式提供相应的sql语句和输入参数。
  （1）Spring配置文件：

<!-- 引入jdbc配置文件 -->
     <context:property-placeholder location="jdbc.properties"/>
      <!--创建jdbc数据源 -->
      <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${driver}"/>
        <property name="url" value="${url}"/>
        <property name="username" value="${username}"/>
        <property name="password" value="${password}"/>
        <property name="initialSize" value="${initialSize}"/>
        <property name="maxActive" value="${maxActive}"/>
        <property name="maxIdle" value="${maxIdle}"/>
        <property name="minIdle" value="${minIdle}"/>
      </bean>
      <!-- 创建SqlSessionFactory，同时指定数据源-->
      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
      <property name="dataSource" ref="dataSource" />
      </bean>
      <!--创建数据映射器，数据映射器必须为接口-->
      <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
      <property name="mapperInterface" value="com.xxt.ibatis.dbcp.dao.UserMapper" />
      <property name="sqlSessionFactory" ref="sqlSessionFactory" />
      </bean>
      <bean id="userDaoImpl2" class="com.xxt.ibatis.dbcp.dao.impl.UserDaoImpl2">
      <property name="userMapper" ref="userMapper"/>
 </bean>
（2）数据映射器UserMapper,代码如下:
public interface UserMapper {
      @Select("SELECT * FROM user WHERE id = #{userId}")
      User getUser(@Param("userId") long id);
}
 (3) dao接口类UserDao，代码如下：
public interface UserDao {
    public User getUserById(User user);
}
(4)dao实现类UserDaoImpl2,，代码如下:
public class UserDaoImpl2 implements UserDao {
       private UserMapper userMapper;
       public void setUserMapper(UserMapper userMapper) {
           this.userMapper = userMapper;
       }
       public User getUserById(User user) {
          return userMapper.getUser(user.getId());
       }
   }

1.环境的配置

在spring和mybatis的整合的过程中是不需要mybatis的配置文件，只需要spring和maper的配置文件

在spring的配置文件里面需要配置spring的基本配置和mybatis需要的数据源和org.mybatis.spring.SqlSessionFactoryBean以及org.mybatis.spring.mapper.MapperScannerConfigurer的配置

2.使用mapper来使用mybatis

在spring和mybatis的整合之后,可以使用mapper的方式来使用mybatis

使用mapper的方式也即只写接口没有接口的实现

在使用mapper的方式来使用的时候需要在mapper的配置文件里面配置namespace属性,namespace属性和接口的全称是一致的,在mapper配置文件里面的操作是和接口中的方法是一致的

3.定义接口和配置mapper

使用mapper方式来使用mybatis的时候需要定义接口,所有的操作是通过mapper的配置来实现的

4.使用时需要注意到事项

在使用的时候对于的pojo需要实现java.io.Serializable接口

 

备注

1.spring的配置文件

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

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:mvc="http://www.springframework.org/schema/mvc"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:context="http://www.springframework.org/schema/context"

xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc.xsd">

 

<mvc:annotation-driven />

 

<!-- 配置加载资源文件包括js，css，image -->

<mvc:default-servlet-handler />

 

<context:component-scan

base-package="circulation.controller">

</context:component-scan>

 

<!-- 配置spring的mvc的ViewResolver -->

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="suffix">

<value>.jsp</value>

</property>

<property name="prefix">

<value>/WEB-INF/view/</value>

</property>

</bean>

 

<!-- 加载配置文件 -->

<context:property-placeholder location="classpath:config.properties"/>

 

<bean class="circulation.model.ReceiptDetailModel" />

 

<bean class="circulation.service.PurchaseService" />

<bean class="circulation.service.UserService" />

 

<!-- 配置数据源 -->

<bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource"

destroy-method="close" autowire="no">

<!-- <property name="fair

 

Queue" value="false" />

<property name="minIdle" value="1" />

<property name="maxIdle" value="5" />

<property name="maxActive" value="5" />

<property name="initialSize" value="1" />

<property name="testOnBorrow" value="true" />

<property name="validationQuery" value="select 1" />

<property name="validationInterval" value="500000" />5min

<property name="removeAbandoned" value="true" />

<property name="removeAbandonedTimeout" value="30" /> -->

<property name="driverClassName" value="${database_driver}" />

<property name="url" value="${database_url}" />

<property name="username" value="${user}" />

<property name="password" value="${pass}" />

</bean>

 

<!-- 配制mybatis的SqlSessionFactoryBean -->

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

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

<!--mapperLocations对应的是mapper的配置文件所在的路径-->

<property name="mapperLocations" value="classpath:circulation/mapper/*.xml" />

</bean>

 

<!-- 配置mybatis的MapperScannerConfigurer -->

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

<!--basePackage对应的是接口所在的目录-->

<property name="basePackage" value="circulation.data" />

<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />

</bean>

 

</beans>

2.接口的定义

package circulation.data;

 

import org.springframework.stereotype.Repository;

 

import java.util.Map;

 

/**

*

* */

@Repository

public interface PurchaseMapper {

 

public int insertPurchaseOrder(Map<String,Object> map);

 

}

3.mapper的配置

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

<!DOCTYPE mapper

PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="circulation.data.PurchaseMapper">

 

<insert id="insertPurchaseOrder">

insert into purchase_head_tab(

purchase_id,purchase_supplier,

purchase_inventory,purchase_money,purchase_data,

purchase_note,purchase_type)

values(#{head.purchaseId},#{head.supplierId},#{head.inventoryId},

#{head.moneys},#{head.purchaseDate},#{head.purchaseNote},

#{head.purchaseType});

insert into purchase_detail_tab(purchase_id,

purchase_product,purchase_count,purchase_note)

values

<foreach collection="list" item="em" separator=",">

(#{head.purchaseId},#{em.productId},

#{em.productCount},#{em.receiptNote})

</foreach>

delete from purchase_detail_tab

where purchase_product = ''

and purchase_id = #{head.purchaseId};

</insert>

 

</mapper>