Gem install for jruby-complete.jar

Question

我正在尝试为jruby 1.7.4安装gem。我正在使用Ruby的Java实现，该实现作为程序（编写API脚本）的一部分提供。这是我在命令提示符下键入的命令：

java -Xmx500M -jar libjruby-complete.jar --command gem install builder --user-install

这是我遇到的错误：

RuntimeCache.java:658:in `<clinit>': java.lang.NoClassDefFoundError: org/jcoding
s/Encoding
    from Ruby.java:216:in `<init>'
    from Ruby.java:275:in `newInstance'
    from Main.java:262:in `internalRun'
    from Main.java:221:in `run'
    from Main.java:201:in `main'

原因：

null:-1:in `run': java.lang.ClassNotFoundException: org.jcodings.Encoding
    from null:-1:in `run'
    from null:-2:in `doPrivileged'
    from null:-1:in `findClass'
    from null:-1:in `loadClass'
    from null:-1:in `loadClass'
    from null:-1:in `loadClass'
    from RuntimeCache.java:658:in `<clinit>'
    from Ruby.java:216:in `<init>'
    from Ruby.java:275:in `newInstance'
    from Main.java:262:in `internalRun'
    from Main.java:221:in `run'
    from Main.java:201:in `main'

Answer 1

我解决了我的问题。以下是我用来安装gems的更新命令：java -Xmx500M -classpath libjcodings.jar;libjoda-time.jar;libjruby-complete.jar org.jruby.Main --command gem install GEM --user-install