environment variable configuration and Eclipse basic configuration

1. My Computer (right-click Properties)----> Advanced system Settings----> Edit System Variables

For example:

Config variable name: Catalina_home variable value: D:\Program files\java\apache-tomcat-7.0.69

　CLASSPATH .; %java_home%\lib;%java_home%\lib\tools.jar

Java_home C:\Program files\java\jdk1.8.0_144 (JDK installation location)

M2_home D:\MyMaven\apache-maven-3.3.9

Add%java_home%\bin%m2_home%\bin to the value of the PATH variable

Window+r output cmd command line output javac (direct execution can query the relevant commands and instructions)

Execute java-version (view Java version)

Execute javac-version (view JRE Runtime Environment version)

Issue: If Javac-version java-version version is inconsistent

WORKAROUND: You can replace the Java.exe Javaw.exe javaws.exe three files under C:\Windows\System32 with the corresponding version

Maven configuration:http://www.cnblogs.com/northern-light/p/7906552.html

environment variable configuration and Eclipse basic configuration