SpringBoot打印系统执行的sql语句以及日志的配置

直接在application.yml/properties文件中进行配置

引入依赖：

	parent>
        groupId>org.springframework.bootgroupId>
        artifactId>spring-boot-starter-parentartifactId>
        
        version>2.3.6.RELEASEversion>
        relativePath/>
    parent>
    dependencies>
		dependency>
            groupId>org.springframework.bootgroupId>
            artifactId>spring-boot-starter-webartifactId>
            
        dependency>
        dependency>
            groupId>org.springframework.bootgroupId>
            artifactId>spring-boot-starter-loggingartifactId>
            
            
        dependency>
    dependencies>

1、Mybatis内置的日志工厂

Mybatis内置的日志工厂提供日志功能，具体的日志实现有以下几种工具：
slf4j
Apache Commons Logging
Log4j 2
Log4j
JDK logging
具体选择哪个日志实现工具由MyBatis的内置日志工厂确定。它会使用最先找到的（按上文列举的顺序查找）。如果一个都未找到，日志功能就会被禁用。

配置log-impl：可供选择的有以下几种

yml中：

mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl #这个是可以打印sql、参数、查询结果的,只会打印到控制台不会输出到日志文件中
			 #org.apache.ibatis.logging.log4j.Log4jImpl:这个不打印查询结果
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.example.plan.entity # 指定的包名

或properties中：

# mybatis plus
mybatis-plus.mapper-locations=classpath:mapper/*Mapper.xml
mybatis-plus.type-aliases-package=com.example.plan
mybatis-plus.configuration.map-underscore-to-camel-case=true
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl # 重点

StdOutImpl控制台输出结果：

==>  Preparing: select id, name, sex from t_user where sex = ?
==> Parameters: 0(Integer)
=      Total: 8

/**
 *第一行是执行的sql语句
 *第二行是传入的参数
 *第三行是返回结果的行数
 */

补充：
log-impl用于设置打印sql的日志实现，指定的值为org.apache.ibatis.logging.Log接口的其中的一个实现类
在这里以StdOutImpl为例

public class StdOutImpl implements Log {

  public StdOutImpl(String clazz) {
    // Do Nothing
  }

  @Override
  public boolean isDebugEnabled() {
    return true;
  }

  @Override
  public boolean isTraceEnabled() {
    return true;
  }

  @Override
  public void error(String s) {
    System.err.println(s);
  }

  @Override
  public void debug(String s) {
    System.out.println(s);
  }

  @Override
  public void trace(String s) {
    System.out.println(s);
  }

  @Override
  public void warn(String s) {
    System.out.println(s);
  }
}

方法里面的输出，是用的System.out/error.println方法，所以如果配置为org.apache.ibatis.logging.stdout.StdOutImpl就只会在控制台窗口打印，不会记录到日志文件。
如果需要保存打印SQL到文件就不能设置为StdOutImpl，可以设置为Slf4jImpl。部分代码如下，使用的是Log的方法，保存到文件中。

  @Override
  public void error(String s) {
    log.error(s);
  }

  @Override
  public void debug(String s) {
    log.debug(s);
  }

  @Override
  public void trace(String s) {
    log.trace(s);
  }

  @Override
  public void warn(String s) {
    log.warn(s);
  }

也可以不设置。然后对应接口所在包设置logback对应包的日志等级[debuginfoerrorwarn等]，即下面所提到的第二种方式。
级别从高到低：OFF 、 FATAL 、 ERROR 、 WARN 、 INFO 、 DEBUG 、 TRACE 、 ALL

2、Spring Boot集成Mybatis

logging.file.name
设置日志文件：支持绝对路径、相对路径，相对路径的话是相对应用的根目录，比如logging.file.name=logs/demo.log;
默认：spring.log
logging.file.path
设置日志路径：支持绝对路径、相对路径，比如 logging.file.path=logs，日志文件默认会存为 spring.log；
默认：根路径/LOG_PATH_IS_UNDEFINED/

yml中：

#spring boot集成mybatis的方式打印sql
logging:
    level:
      com.xxx.mapper: debug # 包路径为mapper文件包路径
      org.springframework: warn
      org.apache.ibatis.logging: debug
    file:
      path/name: #加不加这个配置就看你的resources目录下是否有logbackxxxx之类的xml文件，有的话会自动加载这个，识别里面的logpath。如果外部的这个日志配置和xml文件中具有相同的配置的话，哪个优先级更高一点？

此时，如果有相应的log配置文件，比如叫logback-spring.xml。
配置文件中部分内容如下：

	
    springProfile name="dev,prod,test">
        logger name="com.example.plan" level="info"/>
    springProfile>

    root level="info">
        appender-ref ref="CONSOLE"/>
        appender-ref ref="INFO_FILE"/>
        appender-ref ref="WARNING_FILE"/>
        appender-ref ref="ERROR_FILE"/>
    root>
    

相应的yml中的logging配置：

logging:
  config: ${spring.config.location}logback-spring.xml # 不加也行，Springboot默认的日志配置文件名称为logback.xml和logback-spring.xml、logbackxxxx.xml
spring:
  profiles:
    active: dev

3、总结

sql	其它日志信息	简述	配置
只打印到控制台	不输出	只打印sql到控制台	仅需log-impl配置为StdOutImpl
只打印到控制台	输出	其它日志信息保存到文件，sql只打印到控制台，不保存到文件中	log-impl配置为StdOutImpl，再加上logging的配置（logging.config指定配置文件/ resources目录下有符合spring boot自动化配置文件名的logbackxxx.xml/ yml中logging.level/file配置完整一些）
打印到控制台且输出到日志文件中	输出	sql和其它日志信息保存到文件中，sql也打印到控制台	log-impl为Slf4jImpl/或者不设置，总之不能设置为StdOutImpl，再加上logging的配置即可

配置为logback-test.xml后，控制台的输出：

15:50:13,315 |-INFO in ch.qos.logback.classic.LoggerContext[logback] – Found resource [logback-test.xml] at [file:/Users/congee/Desktop/code/GService/service/target/classes/logback-test.xml]
15:50:13,342 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction – debug attribute not set
15:50:13,345 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction – Will scan for changes in [file:/Users/congee/Desktop/code/GService/service/target/classes/logback-test.xml]
15:50:13,345 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction – Setting ReconfigureOnChangeTask scanning period to 10 seconds
15:50:13,357 |-INFO in ch.qos.logback.classic.joran.action.ContextNameAction – Setting logger context name as [logback]
15:50:13,357 |-INFO in ch.qos.logback.core.joran.action.AppenderAction – About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
15:50:13,358 |-INFO in ch.qos.logback.core.joran.action.AppenderAction – Naming appender as [CONSOLE]
15:50:13,362 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA – Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
15:50:13,381 |-INFO in ch.qos.logback.core.joran.action.AppenderAction – About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
15:50:13,382 |-INFO in ch.qos.logback.core.joran.action.AppenderAction – Naming appender as [INFO_FILE]
15:50:13,382 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA – Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
15:50:13,386 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@1858609436 – No compression will be used
15:50:13,387 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@1858609436 – Will use the pattern /Users/congee/log/monitor//log-info-%d{yyyy-MM-dd}.%i.log for the active file
15:50:13,388 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@7276c8cd – The date pattern is ‘yyyy-MM-dd’ from file name pattern ‘/Users/congee/log/monitor//log-info-%d{yyyy-MM-dd}.%i.log’.
15:50:13,388 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@7276c8cd – Roll-over at midnight.
15:50:13,389 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@7276c8cd – Setting initial period to Thu Apr 13 15:50:13 CST 2023
15:50:13,389 |-WARN in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@7276c8cd – SizeAndTimeBasedFNATP is deprecated. Use SizeAndTimeBasedRollingPolicy instead
15:50:13,389 |-WARN in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@7276c8cd – For more information see http://logback.qos.ch/manual/appenders.html#SizeAndTimeBasedRollingPolicy
15:50:13,392 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[INFO_FILE] – Active log file name: /Users/congee/log/monitor//log-info-2023-04-13.0.log
15:50:13,392 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[INFO_FILE] – File property is set to [null]
15:50:13,392 |-INFO in ch.qos.logback.core.joran.action.AppenderAction – About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
15:50:13,392 |-INFO in ch.qos.logback.core.joran.action.AppenderAction – Naming appender as [WARNING_FILE]
15:50:13,392 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA – Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
15:50:13,393 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@1414147750 – No compression will be used
15:50:13,393 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@1414147750 – Will use the pattern /Users/congee/log/monitor//log-warning-%d{yyyy-MM-dd}.%i.log for the active file
15:50:13,393 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@2e3fc542 – The date pattern is ‘yyyy-MM-dd’ from file name pattern ‘/Users/congee/log/monitor//log-warning-%d{yyyy-MM-dd}.%i.log’.
15:50:13,393 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@2e3fc542 – Roll-over at midnight.
15:50:13,393 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@2e3fc542 – Setting initial period to Thu Apr 13 15:50:13 CST 2023
15:50:13,394 |-WARN in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@2e3fc542 – SizeAndTimeBasedFNATP is deprecated. Use SizeAndTimeBasedRollingPolicy instead
15:50:13,394 |-WARN in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@2e3fc542 – For more information see http://logback.qos.ch/manual/appenders.html#SizeAndTimeBasedRollingPolicy
15:50:13,394 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[WARNING_FILE] – Active log file name: /Users/congee/log/monitor//log-warning-2023-04-13.0.log
15:50:13,394 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[WARNING_FILE] – File property is set to [null]
15:50:13,394 |-INFO in ch.qos.logback.core.joran.action.AppenderAction – About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
15:50:13,394 |-INFO in ch.qos.logback.core.joran.action.AppenderAction – Naming appender as [ERROR_FILE]
15:50:13,394 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA – Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
15:50:13,395 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@22069592 – No compression will be used
15:50:13,395 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@22069592 – Will use the pattern /Users/congee/log/monitor//log-error-%d{yyyy-MM-dd}.%i.log for the active file
15:50:13,395 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@4524411f – The date pattern is ‘yyyy-MM-dd’ from file name pattern ‘/Users/congee/log/monitor//log-error-%d{yyyy-MM-dd}.%i.log’.
15:50:13,395 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@4524411f – Roll-over at midnight.
15:50:13,395 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@4524411f – Setting initial period to Thu Apr 13 15:50:13 CST 2023
15:50:13,395 |-WARN in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@4524411f – SizeAndTimeBasedFNATP is deprecated. Use SizeAndTimeBasedRollingPolicy instead
15:50:13,395 |-WARN in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@4524411f – For more information see http://logback.qos.ch/manual/appenders.html#SizeAndTimeBasedRollingPolicy
15:50:13,395 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[ERROR_FILE] – Active log file name: /Users/congee/log/monitor//log-error-2023-04-13.0.log
15:50:13,395 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[ERROR_FILE] – File property is set to [null]
15:50:13,396 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@91:31 – no applicable action for [springProfile], current ElementPath is [[configuration][springProfile]]
15:50:13,396 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@92:54 – no applicable action for [logger], current ElementPath is [[configuration][springProfile][logger]]
15:50:13,396 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction – Setting level of ROOT logger to INFO
15:50:13,396 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction – Attaching appender named [CONSOLE] to Logger[ROOT]
15:50:13,396 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction – Attaching appender named [INFO_FILE] to Logger[ROOT]
15:50:13,396 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction – Attaching appender named [WARNING_FILE] to Logger[ROOT]
15:50:13,396 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction – Attaching appender named [ERROR_FILE] to Logger[ROOT]
15:50:13,396 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction – End of configuration.
15:50:13,396 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@401e7803 – Registering current configuration as safe fallback point

配置完号后的紧接着的日志输出：

2023-04-13 15:50:18.450 [background-preinit] INFO org.hibernate.validator.internal.util.Version – HV000001: Hibernate Validator 6.1.6.Final
2023-04-13 15:50:18.689 [main] INFO c.u.j.c.EnableEncryptablePropertiesBeanFactoryPostProcessor – Post-processing PropertySource instances
2023-04-13 15:50:18.715 [main] INFO c.u.j.EncryptablePropertySourceConverter – Converting PropertySource configurationProperties [org.springframework.boot.context.properties.source.ConfigurationPropertySourcesPropertySource] to AOP Proxy

可以直观的感受到前面日志的时间格式的变化。