window配置java环境变量

https://www.aaabbc.space:8003/d/webdav/SoftwareInstallationPackage/code/jdk-8u371-windows-x64.exe

变量名：JAVA_HOME
变量值：电脑上JDK安装的绝对路径

变量名：CLASSPATH
变量值：.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;

%JAVA_HOME%\bin
%JAVA_HOME%\jre\bin

java -version