java - Spring boot-1.5.8 应用程序中的 Logback 从 1.1.11 升级到 1.3.0-alpha4

Question

Spring boot 1.5.8默认提供logback-1.1.11版本。我正在尝试将 logback 版本从 1.1.11 升级到 1.3.0-alpha4 并在 pom 中添加以下两个属性。

<slf4j.version>1.8.0-beta4</slf4j.version>
<logback.version>1.3.0-alpha4</logback.version>

当我尝试运行应用程序时出现以下异常。

Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/impl/StaticLoggerBinder
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.getLoggerContext(LogbackLoggingSystem.java:273)
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.beforeInitialize(LogbackLoggingSystem.java:98)
    at org.springframework.boot.logging.LoggingApplicationListener.onApplicationStartingEvent(LoggingApplicationListener.java:230)
    at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:209)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122)
    at org.springframework.boot.context.event.EventPublishingRunListener.starting(EventPublishingRunListener.java:69)
    at org.springframework.boot.SpringApplicationRunListeners.starting(SpringApplicationRunListeners.java:48)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:292)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
    at com.anthem.acmp.service.UMIDALServiceApplication.main(UMIDALServiceApplication.java:25)
Caused by: java.lang.ClassNotFoundException: org.slf4j.impl.StaticLoggerBinder
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 14 more

我发现 logback-classic-1.1.11.jar 包含一个包 org.slf4j.impl，它具有类 StaticLoggerBinder，它在 logback-classic-1.3.0-alpha4 中不可用并导致此问题。

Answer 1

与 1.2 和 1.7 版本相比，Logback 1.3 和 SLF4J 1.8 包含重大的 API 更改。在撰写本文时，Spring Boot 与新 API 不兼容。有一个 issue那就是跟踪对新版本的支持。在项目稳定下来并且不再处于 alpha 或 beta 阶段之前，它不会被解决。