线程“main”java.lang.noClassDefFoundError中的Gradle异常:org/slf4j/loggerFactory

Question

我已经试图让这个工作了三天，现在在我的项目中，并创建了一个简单的项目来测试。我在这里搜索了非常相似的问题，但没有找到任何有助于解决我得到的错误的东西。我甚至把我的软呢帽25重新格式化了，就像它在Windows10上一样，但还是什么都没有。我还在Intellij-2016.3.4的设置和其他设置中启用了注释处理，根据其他答案应该已经修复了它，但它没有改变任何东西。如有任何帮助，不胜感激！！！

com.sammy.checklog.(checklog.java:8)的线程“main”java.lang.noClassDeffounderror：org/slf4j/loggerFactory中出现异常，原因是:java.lang.ClassNotFoundException:org.slf4j.loggerFactory:java.net.urlClassLoader.findClass(urlClassLoader.java:381)在com.intellij.rt.execution.application.appmain.main(appmain.java:123)在更多

import lombok.extern.slf4j.Slf4j;

    @Slf4j
    public class CheckLog {

        public static void main(String... args){
            log.info("I'm Here!! ");
        }
    }

下面是我的build.gradle文件，其中定义了lombok以及相关的slf4j依赖项。

 /*
 * This build file was generated by the Gradle 'init' task.
 *
 * This generated file contains a commented-out sample Java project to get you started.
 * For more details take a look at the Java Quickstart chapter in the Gradle
 * user guide available at https://docs.gradle.org/3.4/userguide/tutorial_java_projects.html
 */

// Apply the java plugin to add support for Java
apply plugin: 'java'
apply plugin: 'application'

mainClassName = 'com.sammy.CheckLog'

// In this section you declare where to find the dependencies of your project
repositories {
    // Use 'jcenter' for resolving your dependencies.
    // You can declare any Maven/Ivy/file repository here.
    jcenter()
}

// In this section you declare the dependencies for your production and test code
dependencies {
    // The production code uses the SLF4J logging API at compile time
    compileOnly 'org.slf4j:slf4j-api:1.7.24'
    compileOnly 'org.slf4j:slf4j-simple:1.7.24'
    compileOnly 'org.projectlombok:lombok:1.16.14'

    // Declare the dependency for your favourite test framework you want to use in your tests.
    // TestNG is also supported by the Gradle Test task. Just change the
    // testCompile dependency to testCompile 'org.testng:testng:6.8.1' and add
    // 'test.useTestNG()' to your build script.
    testCompile 'junit:junit:4.12'
}

更新：在更改为“compile”之后，它在命令行上运行，而不是从Intellij，因为它似乎使用自己的运行时来解释它，而gradle使用我定义的运行时。JDK1.8.0_121

Answer 1

问题是您没有在运行时添加SL4J JAR文件，因为您只使用它进行编译。将SLF4J依赖项的build.gradle文件更改为compile而不是compileonly:

compile 'org.slf4j:slf4j-api:1.7.24'
compile 'org.slf4j:slf4j-simple:1.7.24'