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如果我安装了Rails上的jRuby，我可以只使用Ruby吗？

[英]If I have jRuby on Rails installed can I use only Ruby?

原文 2009-05-22 21:56:04 6 2 ruby/ jruby/ jrubyonrails

What I mean by this is if I install jRuby on Rails, can I use only the ruby language to build my application? 我的意思是，如果我在Rails上安装jRuby，我是否可以只使用ruby语言来构建我的应用程序？ I wanted to install my rails application with jRuby in case I wanted to use Java in the future, though I don't need it now. 我想用jRuby安装我的rails应用程序，以防我以后想要使用Java，尽管我现在不需要它。 Or do I not understand? 或者我不明白？ Is jRuby ruby that has access to java libraries? jRuby ruby是否可以访问java库？

2 个解决方案

yes, jruby is ruby (your ruby scripts need no modification to run under jruby). 是的，jruby是ruby（你的ruby脚本不需要修改就可以在jruby下运行）。 in addition, it has full access to java libraries - check out the wiki for how easy it is to integrate a java class or library into your ruby code. 此外，它可以完全访问java库 - 查看wiki ，将java类或库集成到ruby代码中是多么容易。

The others have answered your direct question. 其他人已经回答了你的直接问题。 I just want to say that I've been using jruby full time at work for the past 6 months and it's great. 我只想说，过去6个月我一直在使用jruby全职工作，这很棒。 Deploying a rails app with the glassfish gem is very easy and jruby performs better than MRI ruby 1.8.x. 使用glassfish gem部署rails应用程序非常容易，jruby比MRI ruby 1.8.x更好。

I've seen no real downside after 6 months other than the fact that we can't use gems that have pieces written in C. However, we've taken a C library and created a gem using FFI and it wasn't too much trouble. 我看到6个月之后没有真正的缺点，除了我们不能使用有C编写的碎片的事实。但是，我们采用了C库并使用FFI创建了一个宝石并且它没有太多麻烦。

It's also really easy to speed up your app by writing a few key pieces in java (which is easier t work with than C). 通过在Java中编写一些关键部分来加速应用程序也非常容易（这比使用C更容易）。