练习二级缓存的使用的时候遇到一些疑惑

一下是测试代码

@Test
public void testLv2Cache(){
   SqlSession sqlSession=null;
   try {
       sqlSession=MyBatisUtils.openSession();
       Goods goods=sqlSession.selectOne("goods.selectById",1603);
       System.out.println(goods.hashCode());
   } catch (Exception e) {
       e.printStackTrace();
   }finally {
       MyBatisUtils.closeSession(sqlSession);
   }
   try {
       sqlSession=MyBatisUtils.openSession();
       Goods goods=sqlSession.selectOne("goods.selectById",1603);
       System.out.println(goods.hashCode());
   } catch (Exception e) {
       e.printStackTrace();
   }finally {
       MyBatisUtils.closeSession(sqlSession);
   }
}

第一运行的时候报错：Cause: java.io.NotSerializableException: com.boeh.mybatis.entity.Goods，Goods类没有序列化，于是对实体类Goods做了一定修改:public class Goods implements Serializable
,实现了 Serializable，

第二次执行程序时，执行成功了，但是goods前后的内存地址是不一样的，日志信息如下。而课上内存地址一致的结果，不理解为什么自己的运行结果内存地址不一致。

希望老师帮我解答

"C:\Program Files\Java\jdk1.8.0_211\bin\java.exe" -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:D:\IDEA\IntelliJ IDEA 2019.1.3\lib\idea_rt.jar=55328:D:\IDEA\IntelliJ IDEA 2019.1.3\bin" -Dfile.encoding=UTF-8 -classpath "D:\IDEA\IntelliJ IDEA 2019.1.3\lib\idea_rt.jar;D:\IDEA\IntelliJ IDEA 2019.1.3\plugins\junit\lib\junit-rt.jar;D:\IDEA\IntelliJ IDEA 2019.1.3\plugins\junit\lib\junit5-rt.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\rt.jar;D:\IdeaProject\mybatis\target\test-classes;D:\IdeaProject\mybatis\target\classes;C:\Users\10220172\.m2\repository\org\mybatis\mybatis\3.5.1\mybatis-3.5.1.jar;C:\Users\10220172\.m2\repository\mysql\mysql-connector-java\8.0.16\mysql-connector-java-8.0.16.jar;C:\Users\10220172\.m2\repository\com\google\protobuf\protobuf-java\3.6.1\protobuf-java-3.6.1.jar;C:\Users\10220172\.m2\repository\junit\junit\4.12\junit-4.12.jar;C:\Users\10220172\.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;C:\Users\10220172\.m2\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;C:\Users\10220172\.m2\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;C:\Users\10220172\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar" com.intellij.rt.execution.junit.JUnitStarter -ideVersion5 -junit4 com.boeh.mybatis.MybatisTest,testLv2Cache
[main] 15:57:12.012 DEBUG org.apache.ibatis.logging.LogFactory - Logging initialized using 'class org.apache.ibatis.logging.slf4j.Slf4jImpl' adapter.
[main] 15:57:12.012 DEBUG o.a.i.d.pooled.PooledDataSource - PooledDataSource forcefully closed/removed all connections.
[main] 15:57:12.012 DEBUG o.a.i.d.pooled.PooledDataSource - PooledDataSource forcefully closed/removed all connections.
[main] 15:57:12.012 DEBUG o.a.i.d.pooled.PooledDataSource - PooledDataSource forcefully closed/removed all connections.
[main] 15:57:12.012 DEBUG o.a.i.d.pooled.PooledDataSource - PooledDataSource forcefully closed/removed all connections.
[main] 15:57:12.012 DEBUG goods - Cache Hit Ratio [goods]: 0.0
[main] 15:57:12.012 DEBUG o.a.i.t.jdbc.JdbcTransaction - Opening JDBC Connection
[main] 15:57:12.012 DEBUG o.a.i.d.pooled.PooledDataSource - Created connection 1412794598.
[main] 15:57:12.012 DEBUG o.a.i.t.jdbc.JdbcTransaction - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@543588e6]
[main] 15:57:12.012 DEBUG goods.selectById - ==>  Preparing: select * from babytun.t_goods where goods_id=?
[main] 15:57:12.012 DEBUG goods.selectById - ==> Parameters: 1603(Integer)
[main] 15:57:12.012 DEBUG goods.selectById - <==      Total: 1
319558327
[main] 15:57:12.012 DEBUG o.a.i.t.jdbc.JdbcTransaction - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@543588e6]
[main] 15:57:12.012 DEBUG o.a.i.t.jdbc.JdbcTransaction - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@543588e6]
[main] 15:57:12.012 DEBUG o.a.i.d.pooled.PooledDataSource - Returned connection 1412794598 to pool.
[main] 15:57:12.012 DEBUG goods - Cache Hit Ratio [goods]: 0.5
33533830
EnumerateProviders catalog=0
EnumerateProviders totalPro=17

Process finished with exit code 0