解决Perhaps you are running on a JRE rather than a JDK?问题

转自：http://www.bubuko.com/infodetail-743907.html

Maven-No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?



[INFO] Scanning for projects...

[INFO]

[INFO] ------------------------------------------------------------------------

[INFO] Building helloworld 0.0.1-SNAPSHOT

[INFO] ------------------------------------------------------------------------

[INFO]

[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ helloworld ---

[INFO] Deleting H:\mavenok\helloworld\target

[INFO]

[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ helloworld ---

[INFO] Using ‘UTF-8‘ encoding to copy filtered resources.

[INFO] skip non existing
resourceDirectory H:\mavenok\helloworld\src\main\resources

[INFO]

[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ helloworld ---

[INFO] Changes detected - recompiling the module!

[INFO] Compiling 1 source file to H:\mavenok\helloworld\target\classes

[INFO] -------------------------------------------------------------

[ERROR] COMPILATION ERROR :

[INFO] -------------------------------------------------------------

[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

[INFO] 1 error

[INFO] -------------------------------------------------------------

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 0.781 s

[INFO] Finished at: 2015-03-25T11:22:14+08:00

[INFO] Final Memory: 4M/8M

[INFO] ------------------------------------------------------------------------

[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project helloworld: Compilation failure

[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

[ERROR] -> [Help 1]

[ERROR]

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to
enable full debug logging.

[ERROR]

[ERROR] For more information
about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
问题描述：No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

翻译过来就是，大哥，环境里没给编译器呀，可能你是用jre在玩耍，我要jdk~~

问题原因：eclipse官网看了看，发现eclipse默认是运行在jre上的，

但是maven插件需要使用jdk，因此需要在eclipse修改Installed
JRES

位置在-->【Window】-->【Prefrences】-->【Java】-->【Installed JREs】

详见下图。



这样就解决了这个问题，重新构建一下

[INFO] Scanning for projects...

[INFO]

[INFO] ------------------------------------------------------------------------

[INFO] Building helloworld 0.0.1-SNAPSHOT

[INFO] ------------------------------------------------------------------------

[INFO]

[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ helloworld ---

[INFO] Deleting H:\mavenok\helloworld\target

[INFO]

[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ helloworld ---

[INFO] Using ‘UTF-8‘ encoding to copy filtered resources.

[INFO] skip non existing
resourceDirectory H:\mavenok\helloworld\src\main\resources

[INFO]

[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ helloworld ---

[INFO] Changes detected - recompiling the module!

[INFO] Compiling 1 source file to H:\mavenok\helloworld\target\classes

[INFO] ------------------------------------------------------------------------

[INFO] BUILD SUCCESS

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 1.117 s

[INFO] Finished at: 2015-03-25T11:45:51+08:00

[INFO] Final Memory: 6M/12M

[INFO] ------------------------------------------------------------------------

构建成功。

安装Maven后，提示“Eclipse is running in a JRE, but a JDK is required”的解决方法

参考自：/article/5595334.html

对于m2eclipse的插件，需要eclipse运行于jdk而不是jre， 打开eclipse,看到错误“Eclipse is running in a JRE, but a JDK is required”

解决方法：

在eclipse目录下eclipse.ini，添加如下两行，注意这行要加在-vmargs之前，

-vm

D:\Program Files\Java\jdk1.7.0_07\bin\javaw.exe

比如我的文件如下：

-startup

plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar

--launcher.library

plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.200.v20120522-1813

-showsplash

org.eclipse.platform

--launcher.XXMaxPermSize

256m

--launcher.defaultAction

openFile

-vm

D:\Program Files\Java\jdk1.7.0_07\bin\javaw.exe

-vmargs

-Xms40m

-Xmx512m

执行了Run as-run configrations





发现这个里面的runtime jre竟然还是设置在Alternate JRE上面，把它设置到Workspace default JRE上就可以了。