MyBatis-一級クエリーキャッシュ

SqlSessionFactory ssf = null;

    //  sqlsessionFactory 
    @Before
    public void init() {
        try {
            InputStream in = Resources.getResourceAsStream("sqlMapConfig.xml");
            ssf = new SqlSessionFactoryBuilder().build(in);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //  
    @Test
    public void associtation() {
        //  sqlsession， SQL
        SqlSession session = ssf.openSession();
        // 
        UserInfoDao dao = session.getMapper(UserInfoDao.class);
        // 
        UserInfo info=dao.findExtraByUser(1);
        // ， ， 
        UserInfo info2=dao.findExtraByUser(1);
        //  
        System.out.println(info);
        System.out.println(info2);
        //  
        session.close();
    }

一度だけsqlを発行

DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - Opening JDBC Connection
DEBUG [main] - Created connection 1468303011.
DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@578486a3]
DEBUG [main] - ==>  Preparing: SELECT * FROM user_info t1,user_extra t2 WHERE t1.id=t2.user_id AND t1.id=? 
DEBUG [main] - ==> Parameters: 1(Integer)
DEBUG [main] - <==      Total: 1
UserInfo [id=1, userName= , userAddr= , userAge=20, userExtra=UserExtra [id=1, work= , salary=100000.0, userId=1], orders=null]
UserInfo [id=1, userName= , userAddr= , userAge=20, userExtra=UserExtra [id=1, work= , salary=100000.0, userId=1], orders=null]
DEBUG [main] - Resetting autocommit to true on JDBC Connection [com.mysql.jdbc.JDBC4Connection@578486a3]
DEBUG [main] - Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@578486a3]
DEBUG [main] - Returned connection 1468303011 to pool.

SqlSessionFactory ssf = null;

    //  sqlsessionFactory 
    @Before
    public void init() {
        try {
            InputStream in = Resources.getResourceAsStream("sqlMapConfig.xml");
            ssf = new SqlSessionFactoryBuilder().build(in);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //  
    @Test
    public void associtation() {
        //  sqlsession， SQL
        SqlSession session = ssf.openSession();
        // 
        UserInfoDao dao = session.getMapper(UserInfoDao.class);
        // 
        UserInfo info=dao.findExtraByUser(1);
        // ， ， 
        UserInfo info2=dao.findExtraByUser(2);
        //  
        System.out.println(info);
        System.out.println(info2);
        //  
        session.close();
    }

DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - Opening JDBC Connection
DEBUG [main] - Created connection 1468303011.
DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@578486a3]
DEBUG [main] - ==>  Preparing: SELECT * FROM user_info t1,user_extra t2 WHERE t1.id=t2.user_id AND t1.id=? 
DEBUG [main] - ==> Parameters: 1(Integer)
DEBUG [main] - <==      Total: 1
DEBUG [main] - ==>  Preparing: SELECT * FROM user_info t1,user_extra t2 WHERE t1.id=t2.user_id AND t1.id=? 
DEBUG [main] - ==> Parameters: 2(Integer)
DEBUG [main] - <==      Total: 1
UserInfo [id=1, userName= , userAddr= , userAge=20, userExtra=UserExtra [id=1, work= , salary=100000.0, userId=1], orders=null]
UserInfo [id=2, userName= , userAddr= , userAge=30, userExtra=UserExtra [id=2, work= , salary=1000.0, userId=2], orders=null]
DEBUG [main] - Resetting autocommit to true on JDBC Connection [com.mysql.jdbc.JDBC4Connection@578486a3]
DEBUG [main] - Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@578486a3]
DEBUG [main] - Returned connection 1468303011 to pool.