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

一、使用sts (spring tools suite )开发maven项目，再执行run as - maven install执行错误.错误主要提示： INFO] [INFO] --- maven-compiler-plugin:3.

一、使用sts (spring tools suite )开发maven项目，再执行run as - maven install执行错误.错误主要提示：

INFO] 

[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ spring-boot-admin ---

[INFO] Changes detected - recompiling the module!

[INFO] Compiling 4 source files to C:\Users\Administrator\git\spring-boot-admin\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: 5.811 s

[INFO] Finished at: 2015-10-14T09:42:08+08:00

[INFO] Final Memory: 13M/204M

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

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project spring-boot-admin: 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

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

这是因为sts安装默认是选择jre来运行程序的，而maven的的一些功能要求使用JDK。解决方法是配置sts的jre,修改成jdk。

修改后看起来是这样:

最后选中你当前项目  右键该项目 - Maven - Update Project

Tomcat出现the jre_home environment variable is not defined correctly this environment variable is need 今天运行Tomcat点击startup.bat cmd直接一闪而过，直接闪退了，很难受，原因是前几天手贱不小心把环境全删了，好难受，只能重新安装了，现在官网下载jdk，我的是jdk-17.0.2，路径是`D:\javase\jdk-17.0.2` 记住这个路径（很重要），然后在环境变量里设置，在用户变量里添加JAVA_HOME与JRE_HOME把我们刚刚的路径复制进去。在系统变量里面的PATH新建的添加%JAVA_HOME%\bin 与%JRE_HOME%\bin 点击确定。环境配置好了。