mybatis二级缓存的实现代码

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration><!-- 新增settings标签--> <settings>    <!-- 开启二级缓存 -->   <settring name="cacheEnabled" value="true"/>  </settings> <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://localhost:3306/hkgoods"/>    <property name="username" value="root"/>    <property name="password" value="123456"/>   </dataSource>  </environment> </environments> <mappers>  <mapper resource="mappers/GoodsInfoMapper.xml"/>  <mapper resource="mappers/NationMapper.xml"/> </mappers></configuration>