mybatis二级缓存未生效

//MybatisTestor.java 中的代码
Exception SqlSession sqlSession = sqlSession = MybatisUtils.TGoods goods = sqlSession.selectOneSystem..printlngoods.hashCodeSystem..printlngoods.getTitleException ee.printStackTraceMybatisUtils.sqlSessionsqlSession = MybatisUtils.TGoods goods = sqlSession.selectOneSystem..printlngoods.hashCodeException ee.printStackTraceMybatisUtils.sqlSession

select from t_goods
        where goods_id = value

                <property name="driver" value="com.mysql.jdbc.Driver"/>

日志

2022-05-24 11:59:39.789 [main] DEBUG goods - Cache Hit Ratio [goods]: 0.0

2022-05-24 11:59:39.796 [main] DEBUG o.a.i.t.jdbc.JdbcTransaction - Opening JDBC Connection

2022-05-24 11:59:40.228 [main] DEBUG o.a.i.d.pooled.PooledDataSource - Created connection 1223867739.

2022-05-24 11:59:40.228 [main] DEBUG o.a.i.t.jdbc.JdbcTransaction - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@48f2bd5b]

2022-05-24 11:59:40.268 [main] DEBUG goods.selectById - ==>  Preparing: select * from t_goods where goods_id = ? 

2022-05-24 11:59:40.331 [main] DEBUG goods.selectById - ==> Parameters: 741(Integer)

2022-05-24 11:59:40.382 [main] DEBUG goods.selectById - <==      Total: 1

921420643

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2022-05-24 11:59:40.384 [main] DEBUG goods - Cache Hit Ratio [goods]: 0.0

2022-05-24 11:59:40.384 [main] DEBUG o.a.i.t.jdbc.JdbcTransaction - Opening JDBC Connection

2022-05-24 11:59:40.447 [main] DEBUG o.a.i.d.pooled.PooledDataSource - Created connection 1010953501.

2022-05-24 11:59:40.447 [main] DEBUG o.a.i.t.jdbc.JdbcTransaction - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@3c41ed1d]

2022-05-24 11:59:40.453 [main] DEBUG goods.selectById - ==>  Preparing: select * from t_goods where goods_id = ? 

2022-05-24 11:59:40.454 [main] DEBUG goods.selectById - ==> Parameters: 741(Integer)

2022-05-24 11:59:40.463 [main] DEBUG goods.selectById - <==      Total: 1

943870983

同学你好，同学反馈代码格式化有一点问题，老师查看不是完整的代码，建议同学选择正确的“代码语言“进行反馈。如下所示：

祝学习愉快！

//mybatisTestor.java
@Test
public void testLevel2Cache() throws Exception {
    SqlSession sqlSession = null;
    try {
        sqlSession = MybatisUtils.openSession();
        TGoods goods = sqlSession.selectOne("goods.selectById", 741);
        System.out.println(goods.hashCode());
        System.out.println(goods.getTitle());
    } catch (Exception e) {
        e.printStackTrace();
        MybatisUtils.closeSession(sqlSession);
    }
    try {
        sqlSession = MybatisUtils.openSession();
        TGoods goods = sqlSession.selectOne("goods.selectById", 741);
        System.out.println(goods.hashCode());
    } catch (Exception e) {
        e.printStackTrace();
        MybatisUtils.closeSession(sqlSession);
    }
}

<?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="goods">
    <!-- 开启二级缓存 -->
    <cache eviction="LRU" flushInterval="600000" size="512" readOnly="true"/>
    <select id="selectAll" resultType="com.imooc.mybatis.entity.TGoods">
        select *
        from t_goods
        order by goods_id desc
    </select>
    <select id="selectById" parameterType="Integer" resultType="com.imooc.mybatis.entity.TGoods" useCache="true">
        select *
        from t_goods
        where goods_id = #{value}
    </select>
    <select id="selectByPriceRange" parameterType="JSONObject" resultType="com.imooc.mybatis.entity.TGoods">
        select *
        from t_goods
        where current_price between #{min} and #{max}
        order by current_price limit #{limit}
    </select>
    <select id="selectGoodsMap" resultType="JSONObject">
        select g.*, c.category_name
        from t_goods g,
             t_category c
        where g.category_id = c.category_id
    </select>
    <insert id="insertGoods" parameterType="com.imooc.mybatis.entity.TGoods">
        insert into t_goods (goods_id,title) value (#{goodsId}, #{title})
        <selectKey resultType="int" keyProperty="goodsId" order="AFTER">
            select last_insert_id()
        </selectKey>
    </insert>
    <update id="update" parameterType="com.imooc.mybatis.entity.TGoods">
        update t_goods
        set title = #{title}
        where goods_id = #{goodsId}
    </update>

    <resultMap id="selectOneToManyResultMap" type="com.imooc.mybatis.entity.TGoods">
        <id column="goods_id" property="goodsId"/>
        <collection property="goodsCoverList" select="goodsCover.selectByGoodsId" column="goods_id"/>
    </resultMap>
    <select id="selectOneToMany" resultMap="selectOneToManyResultMap">
        select *
        from t_goods limit 1
    </select>
</mapper>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <setting name="cacheEnabled" value="true"/>
    </settings>
    <typeAliases>
        <typeAlias alias="Integer" type="java.lang.Integer" />
        <typeAlias alias="Long" type="java.lang.Long" />
        <typeAlias alias="HashMap" type="java.util.HashMap" />
        <typeAlias alias="LinkedHashMap" type="java.util.LinkedHashMap" />
        <typeAlias alias="ArrayList" type="java.util.ArrayList" />
        <typeAlias alias="LinkedList" type="java.util.LinkedList" />
        <typeAlias alias="JSONObject" type="com.alibaba.fastjson.JSONObject" />
    </typeAliases>

    <plugins>
        <!--设置分页插件-->
        <plugin interceptor="com.github.pagehelper.PageInterceptor"/>
    </plugins>

    <environments default="dev">
        <environment id="dev">
            <!-- 采用JDBC方式管理事务 commit/rollback-->
            <transactionManager type="JDBC"/>
            <!-- 采用连接池方式管理数据库链接-->
            <dataSource type="POOLED">
<!--                <property name="driver" value="net.sf.log4jdbc.DriverSpy"/>-->
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url"
                          value="jdbc:mysql://xxx/babytun?zeroDateTimeBehavior=convertToNull&amp;useSSL=false&amp;autoReconnect=true&amp;characterEncoding=utf8"/>
                <property name="username" value="mydev"/>
                <property name="password" value="1Qaz2wsx!@#"/>
            </dataSource>
        </environment>
    </environments>


    <mappers>
        <mapper resource="mappers/classes.xml"/>
        <mapper resource="mappers/goods.xml"/>
        <mapper resource="mappers/goods_cover.xml"/>
        <mapper resource="mappers/student.xml"/>
        <mapper resource="mappers/student1.xml"/>
    </mappers>
</configuration>

感谢老师的耐心指导