1. CATALINA_HOME is the alias of the TOMCAT installation path, the purpose is to facilitate the use of TOMCAT
2. Computer > Properties > Environment Variables, create a new environment variable. The variable name is CATALINA_HOME, the variable value is the decompression directory of tomcat, the one on my computer is: "D:\apache-tomcat-7.0.12", please note that there is no need to add "\" or ";"
3. In the environment variable Path, add "%CATALINA_HOME%\bin\ "
3. Start tomcat: enter the command line cmd, enter startup.bat
4. Open the browser and enter: http://localhost:8080 , (if the port number is modified, add the corresponding port) to see if tomcat starts normally
5. Close tomcat: enter the command line cmd, enter shutdown.bat