SLF4J2.0.x与Logback1.3.x的绑定变动还是很大的，不要乱点鸳鸯谱

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.qsl</groupId>
    <artifactId>spring-boot-2_7_18</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.18</version>
    </parent>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <logback.version>1.3.14</logback.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>spring-boot-starter-logging</artifactId>
                    <groupId>org.springframework.boot</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>${logback.version}</version>
        </dependency>
    </dependencies>
</project>

<parent>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-parent</artifactId>
	<version>2.7.18</version>
</parent>

<parent>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-dependencies</artifactId>
	<version>2.7.18</version>
</parent>

public class LogbackTest {

    private static Logger LOGGER = LoggerFactory.getLogger(LogbackTest.class);

    public static void main(String[] args)
    {
        LOGGER.info("......info");
    }
}

static List<SLF4JServiceProvider> findServiceProviders() {
	// retain behaviour similar to that of 1.7 series and earlier. More specifically, use the class loader that
	// loaded the present class to search for services
	final ClassLoader classLoaderOfLoggerFactory = LoggerFactory.class.getClassLoader();
	ServiceLoader<SLF4JServiceProvider> serviceLoader = getServiceLoader(classLoaderOfLoggerFactory);
	List<SLF4JServiceProvider> providerList = new ArrayList<>();
	Iterator<SLF4JServiceProvider> iterator = serviceLoader.iterator();
	while (iterator.hasNext()) {
		safelyInstantiate(providerList, iterator);
	}
	return providerList;
}

public static ILoggerFactory getILoggerFactory() {
	return getProvider().getLoggerFactory();
}

    public ILoggerFactory getLoggerFactory() {
        return defaultLoggerContext;

//        if (!initialized) {
//            return defaultLoggerContext;
//        
//
//        if (contextSelectorBinder.getContextSelector() == null) {
//            throw new IllegalStateException("contextSelector cannot be null. See also " + NULL_CS_URL);
//        }
//        return contextSelectorBinder.getContextSelector().getLoggerContext();
    }

public static Logger getLogger(String name) {
	ILoggerFactory iLoggerFactory = getILoggerFactory();
	return iLoggerFactory.getLogger(name);
}

private void initializeLoggerContext() {
	try {
		try {
			new ContextInitializer(defaultLoggerContext).autoConfig();
		} catch (JoranException je) {
			Util.report("Failed to auto configure default logger context", je);
		}
		// LOGBACK-292
		if (!StatusUtil.contextHasStatusListener(defaultLoggerContext)) {
			StatusPrinter.printInCaseOfErrorsOrWarnings(defaultLoggerContext);
		}
		// contextSelectorBinder.init(defaultLoggerContext, KEY);

	} catch (Exception t) { // see LOGBACK-1159
		Util.report("Failed to instantiate [" + LoggerContext.class.getName() + "]", t);
	}
}

public void autoConfig(ClassLoader classLoader) throws JoranException {

	// see https://github.com/qos-ch/logback/issues/715
	classLoader = Loader.systemClassloaderIfNull(classLoader);

	String versionStr = EnvUtil.logbackVersion();
	if (versionStr == null) {
		versionStr = CoreConstants.NA;
	}
	loggerContext.getStatusManager().add(new InfoStatus(CoreConstants.LOGBACK_CLASSIC_VERSION_MESSAGE + versionStr, loggerContext));
	StatusListenerConfigHelper.installIfAsked(loggerContext);


	// invoke custom configurators
	List<Configurator> configuratorList = ClassicEnvUtil.loadFromServiceLoader(Configurator.class, classLoader);
	configuratorList.sort(rankComparator);
	if (configuratorList.isEmpty()) {
		contextAware.addInfo("No custom configurators were discovered as a service.");
	} else {
		printConfiguratorOrder(configuratorList);
	}

	for (Configurator c : configuratorList) {
		if (invokeConfigure(c) == Configurator.ExecutionStatus.DO_NOT_INVOKE_NEXT_IF_ANY)
			return;
	}

	// invoke internal configurators
	for (String configuratorClassName : INTERNAL_CONFIGURATOR_CLASSNAME_LIST) {
		contextAware.addInfo("Trying to configure with "+configuratorClassName);
		Configurator c = instantiateConfiguratorByClassName(configuratorClassName, classLoader);
		if(c == null)
			continue;
		if (invokeConfigure(c) == Configurator.ExecutionStatus.DO_NOT_INVOKE_NEXT_IF_ANY)
			return;
	}
}

// invoke internal configurators
for (String configuratorClassName : INTERNAL_CONFIGURATOR_CLASSNAME_LIST) {
	contextAware.addInfo("Trying to configure with "+configuratorClassName);
	Configurator c = instantiateConfiguratorByClassName(configuratorClassName, classLoader);
	if(c == null)
		continue;
	if (invokeConfigure(c) == Configurator.ExecutionStatus.DO_NOT_INVOKE_NEXT_IF_ANY)
		return;
}

String[] INTERNAL_CONFIGURATOR_CLASSNAME_LIST = {"ch.qos.logback.classic.joran.SerializedModelConfigurator",
            "ch.qos.logback.classic.util.DefaultJoranConfigurator", "ch.qos.logback.classic.BasicConfigurator"}