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No log when use commons-loggins and spring-boot
https://docs.spring.io/spring-framework/docs/current/javadoc-api/index.html?org/apache/commons/logging/package-summary.html Spring’s variant of the Commons Logging API: with special support for Log4J 2, SLF4J and java.util.logging. This is a custom bridSpring5.2.x-02-日志体系
现象 Spring体系中, 如果log是由spring-jcl搞出来的, 那么log4j的配置会覆盖logback;即使有logback与slf4j的绑定器, 也会优先使用log4j; 而其他, 如mybatis里的日志, 还是用自己的独立的log组件来打印 Spring-boot 默认使用logback, 日志技术是统一的, 所有的是用一致的log组件spring (boot)使用log4j2实现slf4j日志门面
jcl-over-slf4j + slf4j-api + log4j-slf4j-impl + log4j-core 解决启动时报错： No SLF4J providers were found Failed to load class "org.slf4j.impl.StaticLoggerBinder 只想看解决报错的点击>>这里<< 一、Java日志框架 详情参考1 详情参考2 当系统逐渐复杂，System.out.printlnJCL 002 Copy Dataset
//APKEN002 JOB ,'COPY DATASET',CLASS=C,MSGCLASS=S,MSGLEVEL=(1,1), // REGION=4096K,TIME=1440,COND=((4,LT)),NOTIFY=&SYSUID // !!! PLS DOUBLE CHECK AND REMARK THIS LINE TO SUBMIT