Question

我试图运行带有依赖项的jar。应用程序在Intellij中运行良好，但是当我尝试运行jar时，我得到：

>> java -jar test-0.1.0.jar
Exception in thread "main" java.lang.NoClassDefFoundError: com/atlassian/httpclient/apache/httpcomponents/DefaultHttpClient
        at com.atlassian.jira.rest.client.internal.async.AsynchronousHttpClientFactory.createClient(AsynchronousHttpClientFactory.java:53)
        at com.atlassian.jira.rest.client.internal.async.AsynchronousJiraRestClientFactory.create(AsynchronousJiraRestClientFactory.java:35)
        at com.atlassian.jira.rest.client.internal.async.AsynchronousJiraRestClientFactory.createWithBasicHttpAuthentication(AsynchronousJiraRestClientFactory.java:42)
        at Main.main(Main.java:19)
Caused by: java.lang.ClassNotFoundException: com.atlassian.httpclient.apache.httpcomponents.DefaultHttpClient
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 4 more

我的build.gradle看起来像这样：

group 'test'
version '1.0-SNAPSHOT'

task wrapper(type: Wrapper) {
  gradleVersion = '2.9'
  distributionUrl = "https://services.gradle.org/distributions/gradle-$gradleVersion-all.zip"
}

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

sourceCompatibility = 1.8

mainClassName = "Main"

repositories {
    mavenCentral()
    maven {
        url 'https://maven.atlassian.com/content/repositories/atlassian-public/'
    }
}

jar {
    baseName = 'test'
    version =  '0.1.0'

    from {
        configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
        configurations.runtime.collect { it.isDirectory() ? it : zipTree(it) }
    }

    manifest {
        attributes 'Main-Class': 'Main'
    }
}

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.11'

    compile 'com.atlassian.jira:jira-rest-java-client-parent:4.0.0'
    compile 'com.atlassian.jira:jira-rest-java-client-core:4.0.0'
    compile 'com.atlassian.jira:jira-rest-java-client-api:4.0.0'
    compile 'com.atlassian.jira:jira-rest-java-client-plugin:3.0.0'
    compile 'com.atlassian.fugue:fugue-parent:2.6.1'
    compile 'com.atlassian.fugue:fugue:2.6.1'
}

我也尝试在每个编译条款中添加transitive=true无效。

Answer 1

您需要set CLASSPATH

类路径是Java运行时环境搜索类和其他资源文件的路径。可以在调用JDK工具（首选方法）时使用-classpath选项或通过设置CLASSPATH环境变量来设置类搜索路径（更常见的是较短名称“类路径”）。 -classpath选项是首选，因为您可以为每个应用程序单独设置它，而不会影响其他应用程序，也不会修改其值的其他应用程序。

<强>更新

默认情况下，Gradle不会将依赖项复制到构建文件夹或将其包含在jar中。有三种方法可以解决依赖关系的问题：

单独下载并放入相应的目录。
使用插件构建 fat jar 。像shadow。
添加到build.gradle任务，将依赖项复制到build文件夹中。

例如

task copyDependencies(type: Copy) {
    into "$buildDir/libs"
    from configurations.runtime
}

jar中的NoClassDefFoundError但Intellij中没有

1 个答案: