properties标签：该标签可以加载外部的properties文件
<properties resource="jdbc.properties"></properties>
typeAliases标签：设置类型别名
<typeAlias type="com.juanxincai.domain.User" alias="user"></typeAlias>
mappers标签：加载映射配置
<mapper resource="com/juanxincai/mapper/UserMapping.xml"></mapper>
environments标签：数据源环境配置标签
<environments default="development"> <environment id="development"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql:///test"/> <property name="username" value="root"/> <property name="password" value="root"/> </dataSource> </environment> </environments>
