在win7上明明已经安装了JDK1.6并设置好了JAVA_HOME，可偏偏Tomcat在启动过程中找不到。
报错信息如下：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;提示找不到java_home各jre_home路径，何解？
原因不知道了，下面来看解决办法：
1、分析startup.bat启动脚本：发现其调用了catalina.bat,而catalina.bat调用了setclasspath.bat
2、在setclasspath.bat的头部定义了JAVA_HOME和JRE_HOME的值，那么在这里手动设置JAVA_HOME变量
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\jdk1.5.0_05 set JRE_HOME=C:\Program Files\Java\jre1.5.0_05
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
:gotJreHome if not exist "%JRE_HOME%\bin\java.exe" goto noJavaHome if not
exist "%JRE_HOME%\bin\javaw.exe" goto noJavaHome if not ""%1"" == ""debug"" goto
okJavaHome echo JAVA_HOME should point to a JDK in order to run in debug mode.
goto exit
:gotJdkHome if not exist "%JAVA_HOME%\bin\java.exe" goto noJavaHome if not
exist "%JAVA_HOME%\bin\javaw.exe" goto noJavaHome if not exist
"%JAVA_HOME%\bin\jdb.exe" goto noJavaHome if not exist
"%JAVA_HOME%\bin\javac.exe" goto noJavaHome if not "%JRE_HOME%" == "" goto
okJavaHome set JRE_HOME=%JAVA_HOME% goto okJavaHome
:noJavaHome echo The JAVA_HOME environment variable is not defined correctly
echo This environment variable is needed to run this program echo NB: JAVA_HOME
should point to a JDK not a JRE goto exit :okJavaHome
if not "?SEDIR%" == "" goto gotBasedir echo The BASEDIR environment variable
is not defined echo This environment variable is needed to run this program goto
exit :gotBasedir if exist "?SEDIR%\bin\setclasspath.bat" goto okBasedir echo The
BASEDIR environment variable is not defined correctly echo This environment
variable is needed to run this program goto exit :okBasedir
rem Set the default -Djava.endorsed.dirs argument set
JAVA_ENDORSED_DIRS=?SEDIR%\endorsed
rem Set standard CLASSPATH rem Note that there are no quotes as we do not
want to introduce random rem quotes into the CLASSPATH if not exist
"%JAVA_HOME%\bin\tools.jar" goto noJavac set CLASSPATH=%JAVA_HOME%\lib\tools.jar
:noJavac
rem Set standard command for invoking Java. rem Note that NT requires a
window name argument when using start. rem Also note the quoting as JAVA_HOME
may contain spaces. set _RUNJAVA="%JRE_HOME%\bin\java" set
_RUNJAVAW="%JRE_HOME%\bin\javaw" set _RUNJDB="%JAVA_HOME%\bin\jdb" set
_RUNJAVAC="%JAVA_HOME%\bin\javac"
goto end
:exit exit /b 1
:end
3、重启tomcat，敲入http://localhost:8080验证，问题解决。
tomcat5需要jdk1.6做支撑，jdk1.5不能够。