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线程“main”中的Gradle异常java.lang.NoClassDefFoundError:org / slf4j / LoggerFactory

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我已经尝试在我的项目中将这个工作了三天,并创建了一个简单的项目进行测试 . 我在这里搜索了非常类似的问题,但没有找到任何有助于解决我得到的错误的东西 . 我甚至重新格式化我的Fedora 25,因为它适用于Windows 10,但仍然没有 . 我也在Intellij-2016.3.4注释处理中启用了设置和其他设置,根据其他答案应该修复它但是,它不会改变任何东西 . 请任何帮助将不胜感激!

线程“main”中的异常java.lang.NoClassDefFoundError:org / slf4j / LoggerFactory at com.sammy.CheckLog . (CheckLog.java:8)引起:java.lang.ClassNotFoundException:org.slf4j.LoggerFactory at java.net .URLClassLoader.findClass(URLClassLoader.java:381)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at com.intellij.rt.execution.application.AppMain.main(AppMain.java:123)sun.misc .Launcher $ AppClassLoader.loadClass(Launcher.java:331)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)... 1 more

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'
}

UPDATE :更改为"compile"后,它在命令行上运行,而不是来自Intellij,因为它似乎使用了's own runtime to interpret it while gradle uses the one I' ve定义 . jdk1.8.0_121

3 回答

  • 2

    问题是您没有在运行时添加SL4J JAR文件,因为您将其用于仅编译 . 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'
    
  • 1

    我有一些问题 . IntelliJ Idea 2016.3和Gradle 3.4.1

    初始化一个新项目:

    gradle init --type java-application

    添加了几行到build.gradle

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

    添加到App.java的行:

    ... static Logger logger = LoggerFactory.getLogger(App.class); ...

    现在你在Idea中有错误,但在终端项目中运行正常(使用gradle运行)

    Error in IntelliJ Idea

    更新:我发现如果我使用gradle 3.3(而不是3.4.1)初始化项目,那么错误就会离开 . 也许这种行为与此问题有关:https://youtrack.jetbrains.com/issue/IDEA-167412

  • 1

    更改: compileOnly 'org.slf4j:slf4j-api:1.7.24'compile 'org.slf4j:slf4j-api:1.7.24'

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