问题描述

今天调试的时候，希望将Mybatis的SQL语句输出到控制台，在网上找了许多方法，都没有生效，最后经过多种方法的尝试，解决了问题。

解决方法

我的框架是SpringBoot+Mybatis，日志采用log4j

第一步需要在application.yml中加入：

logging.level.com.xxx.xxx.mapper: debug

具体路径为：logging.level + 你的mapper包路径

第二步修改log4j.yml：

Loggers:
    Root:
      level: debug

将输出日志等级设置为debug

效果：

[] 2018-05-22 16:37:45 - [DEBUG] [SqlSessionUtils:97 getSqlSession] Creating a new SqlSession
[] 2018-05-22 16:37:46 - [DEBUG] [SqlSessionUtils:148 registerSessionHolder] SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d57b264] was not registered for synchronization because synchronization is not active
[] 2018-05-22 16:37:46 - [DEBUG] [DataSourceUtils:110 doGetConnection] Fetching JDBC Connection from DataSource
[] 2018-05-22 16:37:46 - [DEBUG] [BaseJdbcLogger:181 debug] ==>  Preparing: SELECT id, customer_phone, middle_number, unique_id, xxx, xxx, xxx, xxxx FROM xxxx_table WHERE xxx = ? and xx = ? limit 100 
[] 2018-05-22 16:37:47 - [DEBUG] [BaseJdbcLogger:181 debug] ==> Parameters: (String), 877(String)
[] 2018-05-22 16:37:47 - [DEBUG] [BaseJdbcLogger:181 debug] <==      Total: 0
[] 2018-05-22 16:37:47 - [DEBUG] [PreparedStatementPool:129 put] {conn-10005, pstmt-20000} enter cache
[] 2018-05-22 16:37:47 - [DEBUG] [SqlSessionUtils:191 closeSqlSession] Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d57b264]