gradle-没有主清单属性

Question

我正在用Gradle构建一个JAR文件。当我尝试运行它时，我得到了错误

RxJavaD中没有主清单属性emo.jar

我试图操纵清单属性，但我想我忘记向它添加依赖项或其他东西了。我到底做错了什么？

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

mainClassName = 'demo.MainDashboard'

dependencies {
    compile files ("H:/Processes/Development/libraries/hikari-cp/HikariCP-2.4.1.jar")
    compile files ("H:/Processes/Development/libraries/controls-fx/controlsfx.jar")
    compile files ("H:/Processes/Development/libraries/database_connections/sqlite-jdbc-3.8.6.jar")
    compile files ("H:/Processes/Development/libraries/guava/guava-18.0.jar")
    compile files ("H:/Processes/Development/libraries/rxjava/rxjava-1.0.12.jar")
    compile files ("H:/Processes/Development/libraries/rxjava-extras/rxjava-extras-0.5.15.jar")
    compile files ("H:/Processes/Development/libraries/rxjavafx/RxJavaFX-1.0.0-RC1-SNAPSHOT.jar")
    compile files ("H:/Processes/Development/libraries/rxjavaguava/rxjava-guava-1.0.3.jar")
    compile files ("H:/Processes/Development/libraries/rxjava-jdbc/rxjava-jdbc-0.6.3.jar")
    compile files ("H:/Processes/Development/libraries/slf4j/slf4j-api-1.7.12.jar")
    compile files ("H:/Processes/Development/libraries/tom-commons/tom-commons.jar")
}

sourceSets {
    main.java.srcDir "src/main/java"
    main.resources.srcDir "src/main/resources"
}

jar { 
    manifest {
    attributes(
        "Class-Path": configurations.compile.collect { it.getName() }.join(' '))
    }
    from configurations.compile.collect { entry -> zipTree(entry) }
}

Answer 1

FWIW-我使用以下jar任务将所有编译依赖项组装到jar文件中，并使用上述建议正确设置类路径

apply plugin: 'java-library'

jar {
  manifest {
    attributes(
      'Class-Path': configurations.compile.collect { it.getName() }.join(' '),
      'Main-Class': 'your.main.class.goes.here'
    )
  }

  // You can reference any part of the dependency configurations,
  // and you can have as many from statements as you need
  from configurations.compile  
  // I just copied them into the top of the jar, so it looks like the eclipse exported 
  // runnable jar, but you could designate a lib directory, and reference that in the 
  // classpath as "lib/$it.name" instead of it.getName()
  into ''   
}

Answer 2

匿名用户

要使jar文件可执行（以便java-jar命令工作），请在MANIFEST. MF中指定Main-Class属性。

在Gradle中，可以通过配置jar任务来实现。

• 有关Groovy DSL，请参见以下答案（[1]、[2]）

tasks.withType<Jar> {
    manifest {
        attributes["Main-Class"] = "com.caco3.Main"
    }
}

或者为什么mainClassName没有在清单中指定属性？

属性来自应用程序插件。插件：

使开发过程中本地启动应用程序变得容易，并将应用程序打包为TAR和/或ZIP，包括特定于操作系统的启动脚本。

所以应用程序插件的目的不是生成可执行的jars

当设置main ClassName属性时，则：

1. $/gradlew run将在属性中指定的类中启动main方法
2. 使用distZip/distTar任务构建的zip/tar存档将包含一个脚本，该脚本将启动指定类的main方法

下面是设置主类的shell脚本行：

$ grep Main2 gradletest
eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLETEST_OPTS -classpath "\"$CLASSPATH\"" com.caco3.gradletest.Main2 "$APP_ARGS"

Answer 3

尝试更改清单属性，如：

jar {
  manifest {
    attributes(
      'Class-Path': configurations.compile.collect { it.getName() }.join(' '),
      'Main-Class': 'hello.HelloWorld'
    )
  }
}

然后只需将'hello.helloWorld'更改为'