Spring Boot启动Logback报错：无法加载StaticLoggerBinder类求解

问题现象 #

应用构建成功，但启动时抛出如下错误：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/impl/StaticLoggerBinder
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.getLoggerContext(LogbackLoggingSystem.java:293)
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.beforeInitialize(LogbackLoggingSystem.java:118)
    at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationStartingEvent(LoggingApplicationListener.java:238)
    at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:220)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
    at org.springframework.boot.context.event.EventPublishingRunListener.starting(EventPublishingRunListener.java:79)
    at org.springframework.boot.SpringApplicationRunListeners.lambda$starting$0(SpringApplicationRunListeners.java:56)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
    at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120)
    at org.springframework.boot.SpringApplicationRunListeners.starting(SpringApplicationRunListeners.java:56)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:298)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292)
    at com.uks.sam.saveUserapi.saveUserapiApplication.main(saveUserapiApplication.java:19)
Caused by: java.lang.ClassNotFoundException: org.slf4j.impl.StaticLoggerBinder
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    ... 17 more

当前使用的依赖配置：

<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.3.12</version> <!-- Use the latest version available -->
</dependency>

<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-core</artifactId>
    <version>1.3.12</version>
</dependency>
    
<!-- SLF4J API -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.6.0</version>
</dependency>

问题原因 #

Logback 1.3.x版本依赖的SLF4J API版本是2.x，但你配置的SLF4J API是1.6.0版本，版本不兼容导致StaticLoggerBinder类无法被正确加载（SLF4J 2.x中该类的实现逻辑与1.x不同，且Logback 1.3.x基于SLF4J 2.x开发）。

解决方案 #

方案1：统一SLF4J API版本为2.x #

将slf4j-api的版本升级到与Logback 1.3.12兼容的2.x版本（推荐使用SLF4J 2.0.9及以上，与Logback 1.3.12匹配）：

<!-- SLF4J API -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>2.0.9</version>
</dependency>

方案2：使用Spring Boot依赖管理（更推荐） #

如果是Spring Boot项目，直接引入spring-boot-starter-logging依赖，它会自动管理Logback和SLF4J的版本兼容性，避免手动配置版本冲突：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-logging</artifactId>
</dependency>

若需要指定Logback版本为1.3.12，可在properties中配置：

<properties>
    <logback.version>1.3.12</logback.version>
</properties>

验证步骤 #

• 执行mvn clean install重新构建项目
• 启动Spring Boot应用，检查错误是否消失

内容的提问来源于stack exchange，提问作者Manu S Nair