JAVA_HOME does not point to the JDK 解决方法

root cause

Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK

解决方法：

打开Configure Tomcat，选中JAVA选项，改动Java Classpath
在c:/Tomcat/bin/bootstrap.jar
后添加%JAVA_HOME%/lib/tools.jar就行了,如果%JAVA_HOME%不起作用，那就直接设定绝对路径，比如c:/j2skd/lib/tools.jar