如何设置 Play Framework 2.0 的 javac 编译版本以防止出现“Unsupported major.minor version"? [英] How can I set the javac compile version for Play Framework 2.0 to prevent "Unsupported major.minor version"?

问题描述

A module I am using must have been compiled with Java 1.7, and I only have 1.6.

If I want to for the module to be compiled for a specific version like 1.6, how can I set that in Play! Framework 2.0 so that I can prevent the "Unsupported major.minor version" errors.

In Play! 1.x you could set "java.version=1.6" in the application.conf.

I assume that in Play! 2.x it probably needs to be set somewhere for sbt - but where/how?

解决方案

Adding

javacOptions ++= Seq("-source", "1.6", "-target", "1.6")

to the build.sbt file worked for me (to be transparent, in my case it was 1.7 to build with JDK 8).

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