spring4默认日志是log4j, spring5默认日志是JUL spring4下使用JCL时，如果有log4j的jar,用的具体实现类是log4j，否则用的具体实现类是JUL spring4下使用JCL时，用的具体实现类是JUL
1、spring4下日志加载顺序
//循环
for
(int i
=0
; i
<classesToDiscover.length
&& result
== null
; ++i
) {
result
= createLogFromClass
(classesToDiscover
[i
], logCategory, true
);
}
//默认加载顺序
private static final String
[] classesToDiscover
= {
//
"org.apache.commons.logging.impl.Log4JLogger"
LOGGING_IMPL_LOG4J_LOGGER,
"org.apache.commons.logging.impl.Jdk14Logger",
"org.apache.commons.logging.impl.Jdk13LumberjackLogger",
"org.apache.commons.logging.impl.SimpleLog"
};
2、spring5下日志加载顺序
public static Log getLog
(String name
) {
switch
(logApi
) {
case LOG4J:
return Log4jDelegate.createLog
(name
);
case SLF4J_LAL:
return Slf4jDelegate.createLocationAwareLog
(name
);
case SLF4J:
return Slf4jDelegate.createLog
(name
);
default:
return JavaUtilDelegate.createLog
(name
);
}
}
mybatis+log4j 日志是log4j
mybatis+log4j+sping4 日志是log4j
mybatis+log4j+sping5 日志是jcl----jul
3、mybatis下日志加载顺序
static
{
//slf4j
tryImplementation
(LogFactory::useSlf4jLogging
);
//jcl
tryImplementation
(LogFactory::useCommonsLogging
);
//log4j2
tryImplementation
(LogFactory::useLog4J2Logging
);
//log4j
tryImplementation
(LogFactory::useLog4JLogging
);
//jul
tryImplementation
(LogFactory::useJdkLogging
);
tryImplementation
(LogFactory::useNoLogging
);
}
