ibatis->mybatis升级过程

最终目录结构

resources
    spring
        applicationContext.xml
    sqlmap
        mapper
            aaamapper.xml
            bbbmapper.xml
        mybatis-config.xml

pom

• 升级前

<dependency>
    <groupId>org.ibatis</groupId>
    <artifactId>ibatis</artifactId>
    <version>2.3.3.720</version>
</dependency>

• 升级后

<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version></version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version></version>
</dependency>

applicationContext.xml

• 升级后

<bean id="xxsqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource_agencyjizhong"/>
    <property name="mapperLocations" value="classpath:sqlmap/mapper/*.xml"/>
    <property name="configLocation" value="classpath:sqlmap/mybatis-config.xml"/>
</bean>

如果id为默认的sqlSessionFactory，会导致MapperScannerConfigurer在加载bean时，加载PropertyPlaceholderConfigurer还没来得及替换定义中的变量，其中就包含数据源中的配置（例如：${env}）

<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg index=" ref="xxsqlSessionFactory"/>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <!--映射器接口文件的包路径-->
    <property name="basePackage" value="com.maosheng.mapper"/>
    <property name="sqlSessionFactoryBeanName" value="xxsqlSessionFactory"/>
</bean>

mybatis-config.xml

目录结构

<configuration>
    <settings></settings>
    <typeAliases></typeAliases>
    <mappers></mappers>
</configuration>

1. dtd

   <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">

2. 根节点
   • 升级前 sqlMapConfig
   • 升级后 configuration
3. settings
   • 升级前 <settings x="y" foo="bar"/>
   • 升级后

     <settings>
     <setting name="x" value="y"/>
     <setting name="foo" value="bar"/>
     </settings>

4. typeAlias

   将每个***mapper.xml中下的typeAlias全部移至sqlMapConfig.xml中下

***mapper.xml

1. dtd

   <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

2. mapper
3. parameterType
   • 升级前 parameterClass
   • 升级后 parameterType
4. resultType
   • 升级前 resultClass
   • 升级后 resultType
5. 内联参数
   • 升级前 #value#或者value
   • 升级后 #{value}

注意和${value}的区别