maven项目启动报错Eclipse中，Nocompilerisprovidedinthis

问题说明

Eclipse导入Maven项目后，执行 mvn clean install后，出现如下错误：

[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.0:compile (default-compile) on project myproject: 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

大致阅读了一下，说的是执行编译失败，你是不是在JRE环境下运行而不是JDK？闹闹头想了想，JDK已安装、各种环境变量配置木有问题，为什么会出现这种状况呢？寻思了一会儿，知道了原来Eclipse运行是需要一个JRE，而这个JRE并不是系统环境变量中的;">javac，故无法进行java的编译，问题找到了，下面说一下具体解决方案。

在Eclipse的菜单中，进入 Window > Preferences > Java > Installed JREs > Execution Environments，选择JavaSE-1.x, 在右侧选择JDK的安装目录（注意不要选择JRE的目录）.

然后，进行maven install的时候就会找得到javac了