jrebel setup guide（jruby gems）
Install Rake, full JRuby-OpenSSL support, RSpec and ZenTest:
sudo jruby -S gem install jdbc-[DBNAME] jdbc-derby jdbc-h2 jdbc-hsqldb jdbc-mysql jdbc-postgres jdbc-sqlite3
Inside Rails
To use activerecord-jdbc-adapter with JRuby on Rails:
1. Choose the adapter you wish to gem install. The following pre-packaged adapters are available:
base jdbc (activerecord-jdbc-adapter). Supports all available databases via JDBC, but requires you to download and manually install the database vendors JDBC driver .jar file. mysql (activerecord-jdbcmysql-adapter) postgresql (activerecord-jdbcpostgresql-adapter) derby (activerecord-jdbcderby-adapter) hsqldb (activerecord-jdbchsqldb-adapter) h2 (activerecord-jdbch2-adapter)2. Run the "jdbc" generator to prepare your Rails application for JDBC.
jruby script/generate jdbcuninstall all gems
31. May 2008
edit
To perform batch operations in MacPorts you can use the predefined pseudo-portnames. RubyGems has no such thing, but instead it can handle regular expressions. So to uninstall all gems of your default RubyGems installation you can simply issue the following command.
sudo gem uninstall --a --ignore-dependencies .+创心域SEO版权声明：以上内容作者已申请原创保护，未经允许不得转载，侵权必究！授权事宜、对本内容有异议或投诉，敬请联系网站管理员，我们将尽快回复您，谢谢合作！