rammus@Rammus-MacBook-Pro.local:~/workspace/HelloWorld/build$ java -jar libs/HelloWorld-1.0.jar
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: com/amazonaws/services/sqs/AmazonSQS
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: com.amazonaws.services.sqs.AmazonSQS
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
這邊以加入AmazionSQS的dependency為例
在使用gradle打包完jar檔後執行,發現會出現
NoClassDefFoundError
的錯誤訊息。Error Log
解開jar檔後發現根本沒有dependency的library,google了很久之後,才找到必須在打包的task裡面加入dependency的語法[2]。
build.gradle
attributes 'Main-Class': 'com.hello.aws.Main'
決定jar檔的進入點(Entry Point)from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
將相依的class都加入jar檔編輯完build.gradle後可以在projectt根目錄下執行
或是透過IDE的gradle plugin執行task:jar
Run
Snippet
Reference