以前装了jdk1.6，最近想装tomcat，结果环境都配好了，出现了这个错误：Neither the JAVA_HOME nor the JRE_HOME
environment variable is defined At least one of these environment variable is needed to run this program。
原因是：它不会自动登记这两个环境变量，
解决方法：记事本打开tomcat文件bin中的setclasspath.bat
rem ---------------------------------------------------------------------------
rem Set CLASSPATH and Java options
rem
rem $Id: setclasspath.bat 505241 2007-02-09 10:22:58Z jfclere $
rem ---------------------------------------------------------------------------
set JAVA_HOME=C:/Program Files/Java/jdk1.7.0_02
set JRE_HOME=C:/Program Files/Java/jre7
rem Make sure prerequisite environment variables are set
if not "%JAVA_HOME%" == "" goto gotJdkHome
if not "%JRE_HOME%" == "" goto gotJreHome
echo Neither the JAVA_HOME nor the JRE_HOME environment variable is defined
echo At least one of these environment variable is needed to run this program
goto exit
ok，终于好了