使用play-scalr引發不支持的major.minor版本51.0

Question

我試圖在Play上使用play-scalr，並按照Github page上的安裝說明進行操作，但是當我請求調整大小的圖像時，出現錯誤：

[RuntimeException: java.lang.UnsupportedClassVersionError: se/digiplant/scalr/api/Resizer$Mode : Unsupported major.minor version 51.0]

當我編譯了該項目，瓶被下載，所以我認爲這個問題是，他們使用Java 1.7編譯，但是我試圖用Java 1.6的使用：

$ play compile 
[info] Loading project definition from /Users/brad/projects/builders/project 
[info] Set current project to builders (in build file:/Users/brad/projects/builders/) 
[info] Updating {file:/Users/brad/projects/builders/}builders... 
[info] downloading http://repo1.maven.org/maven2/se/digiplant/play-scalr_2.10/1.0/play-scalr_2.10-1.0.jar ... 
[info] [SUCCESSFUL ] se.digiplant#play-scalr_2.10;1.0!play-scalr_2.10.jar (2782ms) 
[info] downloading http://repo1.maven.org/maven2/se/digiplant/play-res_2.10/1.0/play-res_2.10-1.0.jar ... 
[info] [SUCCESSFUL ] se.digiplant#play-res_2.10;1.0!play-res_2.10.jar (2553ms) 
[info] Done updating. 
[success] Total time: 26 s, completed 14/04/2013 3:06:18 PM 

以下是我使用的版本：

$ play about 
[info] Loading project definition from /Users/brad/projects/builders/project 
[info] Set current project to builders (in build file:/Users/brad/projects/builders/) 
[info] This is sbt 0.12.2 
[info] The current project is {file:/Users/brad/projects/builders/}builders 
[info] The current project is built against Scala 2.10.0 
[info] Available Plugins: play.Project, sbt.PlayProject, com.typesafe.sbteclipse.plugin.EclipsePlugin, com.typesafe.sbtidea.SbtIdeaPlugin 
[info] sbt, sbt plugins, and build definitions are using Scala 2.9.2 

$ scala -version 
Scala code runner version 2.9.2 -- Copyright 2002-2011, LAMP/EPFL 

$ java -version 
java version "1.6.0_43" 
Java(TM) SE Runtime Environment (build 1.6.0_43-b01-447-11M4203) 
Java HotSpot(TM) 64-Bit Server VM (build 20.14-b01-447, mixed mode) 

$ javac -version 
javac 1.6.0_43 

Answer 1

我結束了下載源play-scalr，與Java 1.6編譯，然後把得到的.jar到我lib/目錄。