tomcat Error:NB:JAVA_HOME should point to a JDK not a JRE 解决方法

环境：win7

tomcata7.0解压版本

执行:service.bat install

报错：JAVA_HOME should point to a JDK not a JRE

网上找了几种解决方案，其中一种是成功的：

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