方法一：

即：

<?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>
 
        <settings>
            <!-- 打印查询语句 -->
            <setting name="logImpl" value="STDOUT_LOGGING" />
        </settings>
 
</configuration>

转载地址：https://blog.csdn.net/jiangyu1013/article/details/99298544