解决com.sun.tools.javac.Main is not on the classpath的问题

com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK.
It is currently set to "C:/Program Files/Java/jre1.5.0_11" 

遇到这种情况时直接将C:/Program Files/Java/jdk1.5.0_11/lib中的tools.lib拷贝到C:/Program Files/Java/jre1.5.0_11/lib中即可。

如果还是不行，那请配置一下JDK的环境变量，并关闭IDE然后重新打开。

转自：http://blog.csdn.net/lhjlhj123123/article/details/5607106