错误无法加载 class "org.slf4j.impl.StaticLoggerBinder" Apache Kafka

Question

我在构建 Java class 和运行时遇到错误无法加载 class "org.slf4j.impl.StaticLoggerBinder"。我正在学习 "Apache Kafka Quick Start Guide" 书中的课程。 Java 项目被编译为 gradle 项目。我已将 'slf4j-simple' 包含在 build.gradle 文件中，但错误仍然存在。

我正在输入 gradle jar 来构建 .jar 文件。

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.

和 build.gradle:

apply plugin: 'java'
apply plugin: 'application'

sourceCompatibility = '1.8'

mainClassName = 'monedero.ProcessingEngine'

repositories {
   mavenCentral()
}

version = '0.1.0'

dependencies {
   compile group: 'org.apache.kafka', name: 'kafka_2.12', version: 
   '2.0.0'
   compile group: 'com.fasterxml.jackson.core', name: 'jackson-core', 
   version: '2.9.7'
   testCompile group: 'org.slf4j', name: 'slf4j-simple', version:  
   1.6.1'
             }

jar {
    manifest {
       attributes 'Main-Class': mainClassName
    } from {
       configurations.compile.collect {
          it.isDirectory() ? it : zipTree(it)
    }
}
exclude "META-INF/*.SF"
exclude "META-INF/*.DSA"
exclude "META-INF/*.RSA"
}

Answer 1

对于要由主应用程序加载的类，您需要将 testCompile 更改为仅 compile。

错误无法加载 class "org.slf4j.impl.StaticLoggerBinder" Apache Kafka

Error Failed to load class "org.slf4j.impl.StaticLoggerBinder" Apache Kafka

java

slf4j

gradle