groovy - 编译Groovy类

Question

我试图编译gradle附带的groovy quickstart示例(在samples / groovy / quickstart目录中)。 gradle compileGroovy和gradle jar都成功完成，但是我无法运行其中任何一个:

c:\tmp\quickstart\build\classes\main\org\gradle>java Person
Exception in thread "main" java.lang.NoClassDefFoundError: Person (wrong name: org/gradle/Person)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(Unknown Source)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$000(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: Person.  Program will exit.

和

c:\tmp\quickstart\build\libs>java -jar quickstart.jar
Failed to load Main-Class manifest attribute from
quickstart.jar

然后我将manifest属性添加到bulid.gradle:

jar {
    manifest {
        attributes("Main-Class": "org.gradle.Person")
    }
}

现在得到:

c:\tmp\quickstart\build\libs>java -jar quickstart.jar
Exception in thread "main" java.lang.NoClassDefFoundError: groovy/lang/GroovyObject
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(Unknown Source)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$000(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Caused by: java.lang.ClassNotFoundException: groovy.lang.GroovyObject
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 12 more
Could not find the main class: org.gradle.Person. Program will exit.

如何运行创建的jar？ (或者我错过了重点吗？)

Answer 1

Gradle发行版中的groovy/quickstart示例并不旨在直接执行。除其他事项外，Person类没有main方法。认为它是一个图书馆。