windows org.jruby.Main 上的 NoClassDefFoundError
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NoClassDefFoundError on org.jruby.Main
提问by dr.
I'm trying to install the hpricot gem on my Windows machine using JRuby 1.4.0RC1. I'm trying to follow the advice to the related question (see -> Installing hpricot for JRuby).
我正在尝试使用 JRuby 1.4.0RC1 在我的 Windows 机器上安装 hpricot gem。我正在尝试遵循相关问题的建议（请参阅 ->为 JRuby 安装 hpricot）。
Per the answer's advice I pulled the git head of hpricot and from it's dir ran:
根据答案的建议，我拉了 hpricot 的 git 头，并从它的目录中运行：
jruby -S rake package_jruby
cd pkg
sudo jgem install ./hpricot-0.8.1-jruby.gem
But when I run this I get the following NoClassDefFoundError:
但是当我运行它时，我得到以下 NoClassDefFoundError：
Exception in thread "main" java.lang.NoClassDefFoundError: org/jruby/Main
Caused by: java.lang.ClassNotFoundException: org.jruby.Main
at java.net.URLClassLoader.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)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Could not find the main class: org.jruby.Main. Program will exit.
Apparently my JRUBY_HOME\lib\jruby.jar is getting lost.
显然我的 JRUBY_HOME\lib\jruby.jar 迷路了。
running jruby -v works fine, so I'm confused where my class path is getting messed up.
运行 jruby -v 工作正常，所以我很困惑我的类路径在哪里变得混乱。
回答by Charles Oliver Nutter
It looks like your jruby install isn't complete. Did you grab the binor srcdist? Check if lib/jruby.jarexists, make sure bin/jrubyis in the same jruby location as lib/jruby.jar, and test java -jar lib/jruby.jar -e "puts 'hello'"to see if it's functional.
看起来您的 jruby 安装尚未完成。你抓住了bin还是srcdist？检查是否lib/jruby.jar存在，确保bin/jruby与 位于相同的 jruby 位置lib/jruby.jar，然后测试java -jar lib/jruby.jar -e "puts 'hello'"它是否正常工作。
回答by Vladimir Dyuzhev
I suspect sudo does not inherit your environment variables. So JRUBY_HOME is gone. Try to add it to jgem profile.
我怀疑 sudo 没有继承您的环境变量。所以 JRUBY_HOME 不见了。尝试将其添加到 jgem 配置文件中。
回答by dr.
I'm on Windows. I'm not sure if JRuby 1.4 drops the 'j' prefix. jgem isn't recognized, but gem is. Regardless, when I gem environment I get:
我在 Windows 上。我不确定 JRuby 1.4 是否删除了 'j' 前缀。jgem 不被识别，但 gem 被识别。无论如何，当我 gem 环境时，我得到：
C:\tmp\hpricot>gem environment
RubyGems Environment:
- RUBYGEMS VERSION: 1.3.5
- RUBY VERSION: 1.8.7 (2009-09-30 patchlevel 174) [java]
- INSTALLATION DIRECTORY: C:/jruby-1.4.0RC1/lib/ruby/gems/1.8
- RUBY EXECUTABLE: C:/jruby-1.4.0RC1/bin/../bin/jruby.bat
- EXECUTABLE DIRECTORY: C:/jruby-1.4.0RC1/bin/../bin
- RUBYGEMS PLATFORMS:
- ruby
- universal-java-1.6
- GEM PATHS:
- C:/jruby-1.4.0RC1/lib/ruby/gems/1.8
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :benchmark => false
- :backtrace => false
- :bulk_threshold => 1000
- "install" => "--env-shebang"
- "update" => "--env-shebang"
- REMOTE SOURCES:
- http://gems.rubyforge.org/
