Grails war命令导致java.lang.UnsupportedClassVersionError

我认为我最近没有对我的机器配置做任何调整，但突然之间，在我执行了“grails clean”之后，紧接着是“grails war”，我无法构建我的项目，因为：“java.lang.UnsupportedClassVersionError”

以下是我执行“圣杯战争”时得到的信息：

Welcome to Grails 1.1.1 - http://grails.org/
Licensed under Apache Standard License 2.0
Grails home is set to: /usr/local/grails-1.1.1

Base Directory: /Users/Robin/code/
Running script /usr/local/grails-1.1.1/scripts/War.groovy
Environment set to production
Warning, target causing name overwriting of name startLogging
     [copy] Copied 6 empty directories to 3 empty directories 
under /Users/robin/.grails/1.1.1/projects/wf/resources
    [mkdir] Created dir: /Users/Robin/code/web-app/plugins/ui-performance-1.2.1
     [copy] Copying 1 file to /Users/Robin/code/web-app/plugins/ui-performance-1.2.1
    [mkdir] Created dir: /Users/robin/.grails/1.1.1/projects/wf/classes
  [groovyc] Compiling 14 source files to /Users/robin/.grails/1.1.1/projects/wf/classes
  [groovyc] Compiling 262 source files to /Users/robin/.grails/1.1.1/projects/wf/classes
Compilation error: java.lang.UnsupportedClassVersionError: Bad version number in .class file

我有一些JAR是java/Groovy类的一部分，它们是使用Groovy 1.6.5编译的

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我从哪里开始寻找问题的根源？在Grails1.1之前，我不记得框架有这么多问题。

AFAIK，Grails1.1.1不依赖于任何JDK 6.x特性，并且编译时与1.5兼容。我假设您至少安装了一个使用目标JDK 6.x编译的插件

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最简单的解决方案是安装一个JDK 6.x，并用它完成所有与Grails相关的工作。如果由于某种原因这是不可能的，您可以使用来识别“坏人”，特别是在~/.grails/1.1.1/projects/wf/plugins中。然后使用svn检查“坏家伙”插件的源代码，并使用JDK1.5自己编译它

谢谢你指出这个工具。太棒了！（我需要继续使用JDK 1.5）部分问题可能是由于MacOS X 10.6没有或不支持JDK 1.5（我知道您可以自己添加它…）

Welcome to Grails 1.1.1 - http://grails.org/
Licensed under Apache Standard License 2.0
Grails home is set to: /usr/local/grails-1.1.1

Base Directory: /Users/Robin/code/
Running script /usr/local/grails-1.1.1/scripts/War.groovy
Environment set to production
Warning, target causing name overwriting of name startLogging
     [copy] Copied 6 empty directories to 3 empty directories 
under /Users/robin/.grails/1.1.1/projects/wf/resources
    [mkdir] Created dir: /Users/Robin/code/web-app/plugins/ui-performance-1.2.1
     [copy] Copying 1 file to /Users/Robin/code/web-app/plugins/ui-performance-1.2.1
    [mkdir] Created dir: /Users/robin/.grails/1.1.1/projects/wf/classes
  [groovyc] Compiling 14 source files to /Users/robin/.grails/1.1.1/projects/wf/classes
  [groovyc] Compiling 262 source files to /Users/robin/.grails/1.1.1/projects/wf/classes
Compilation error: java.lang.UnsupportedClassVersionError: Bad version number in .class file