Slf4j是底层日志框架(如log4j、logback、java.util.logging)的门面。

为了连接底层框架，slf4j使用了绑定。

log4j - slf4j-log4j12-1.7.21.jar java.util.logging – slf4j-jdk14-1.7.21.jar etc

如果没有绑定jar，就会抛出上述错误。您可以下载这个jar并将其添加到类路径中。

对于maven依赖，

<dependency> 
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
  <version>1.7.21</version>
</dependency>

除了slf4j-log4j12-1.7.21.jar之外，这个依赖项还将slf4j-api-1.7.21.jar以及log4j-1.2.17.jar拉到您的项目中

参考:http://www.slf4j.org/manual.html

SLF4j是各种日志记录框架的抽象。因此，除了slf4j之外，您还需要在类路径中包含任何日志框架，如log4j或logback(等等)。 要有一个想法，请参考http://logback.qos.ch/manual/introduction.html的第一步

请将以下依赖项添加到pom以解决此问题。

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-simple</artifactId>
  <version>1.7.25</version>
  <scope>test</scope>
</dependency>

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>1.7.25</version>
</dependency>

我添加了这个依赖来解决这个问题:

https://mvnrepository.com/artifact/org.slf4j/slf4j-simple/1.7.25

当我得到以下错误时，我陷入了这个问题:

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.

当我在我的库中使用slf4j-api-1.7.5.jar。

尽管我尝试了整个建议的补充jar，如slf4j-log4j12-1.7.5.jar, slf4j-simple-1.7.5，但错误消息仍然存在。当我将slf4j-jdk14-1.7.5.jar添加到java库中时，这个问题最终得到了解决。

在http://www.slf4j.org/download.html上获得整个slf4j包

他们的官网给出了解决方案:

Failed to load class org.slf4j.impl.StaticLoggerBinder This warning message is reported when the org.slf4j.impl.StaticLoggerBinder class could not be loaded into memory. This happens when no appropriate SLF4J binding could be found on the class path. Placing one (and only one) of slf4j-nop.jar slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem. SINCE 1.6.0 As of SLF4J version 1.6, in the absence of a binding, SLF4J will default to a no-operation (NOP) logger implementation. If you are responsible for packaging an application and do not care about logging, then placing slf4j-nop.jar on the class path of your application will get rid of this warning message. Note that embedded components such as libraries or frameworks should not declare a dependency on any SLF4J binding but only depend on slf4j-api. When a library declares a compile-time dependency on a SLF4J binding, it imposes that binding on the end-user, thus negating SLF4J's purpose.

解决方案:我已经添加到我的项目中使用intellij的maven研究，我选择了slf4j-jdk14.jar。