我要评论报错信息如下：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
复制代码 代码如下:
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。
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