编译 jruby “Hello world"问题 [英] Compile jruby "Hello world" problem

问题描述

我已经用 Ruby 编程一段时间了，我真的很喜欢它.最近我开始需要编译一些 ruby​​ 代码.出于多种原因，使用 Ruby2exe 不是我的选择.所以我决定尝试一下 Jruby(生成一个 jar 就足够了).

I have been programming for a while with Ruby and I really enjoy it. Lately I started having the need of compiling some ruby code. For several reasons using Ruby2exe is not an option for me. So I decided to give Jruby a try (generating a jar would be good enough).

我使用的是 Windows 并且我安装了 java JDK 6u17(位于 C:Program FilesJavajdk1.6.0_17).

I am using windows and I installed java JDK 6u17 (at C:Program FilesJavajdk1.6.0_17).

我在 C:jruby 安装了 jruby 1.4

I installed jruby 1.4 at C:jruby

我用 java 创建了一个 hello world，编译并执行它就好了(所以 java 工作正常).

I created a hello world in java, compile and executed it just fine (so java works fine).

我创建了一个文件script.rb":

I created a file "script.rb" with:

输入你好，世界"

我用 jruby 运行这个程序:

I run this program with jruby:

jruby script.rb

而且效果很好.

我确实将 JAVA_HOME 设置为 C:Program FilesJavajdk1.6.0_17

I did set JAVA_HOME to C:Program FilesJavajdk1.6.0_17

我也成功运行了:

java -jar c:jrubylibjruby.jar script.rb

然后我用命令编译:

jruby -S jrubyc script.rb

它生成类'script.class'

It generates the class 'script.class'

我的问题是我找不到正确执行 script.class 的方法

My problem is that I found no way to properly execute script.class

我尝试:

java -cp .:c:jrubylibjruby.jar 脚本

然后我收到错误消息:

Exception in thread "main" java.lang.NoClassDefFoundError: script
Caused by: java.lang.ClassNotFoundException: script
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Could not find the main class: script.  Program will exit.

我还尝试将 jruby-complete-1.4.0.jar 以及其他几个选项复制到本地目录.

I also tried copying jruby-complete-1.4.0.jar to local dir as well as several other options.

有人知道我做错了什么吗?

Anyone know what am I doing wrong?

推荐答案

假设你在 windows 上，我认为你的 -cp arg 是错误的:它应该用分号分隔:

Assuming you are on windows, I think your -cp arg is wrong: it should be semi-colon delimited:

java -cp .;c:jrubylibjruby.jar 脚本

而且，我通过单独设置 CLASSPATH 环境获得了更好的运气，例如:

But also, I had better luck by setting the CLASSPATH env separately, e.g.:

C:
uby>set CLASSPATH=c:Program Filesjruby-1.4.0libjruby.jar;

C:
uby>java hello_world
Hello, world!

但也许那是因为我的类路径中需要一个空格.

But perhaps that's because my classpath needs a space in it.

您使用的是哪个版本的 JRuby?如您所见，我使用的是 1.4.

What version of JRuby are you using? As you can see, I'm on 1.4.

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