求问有人在Eclipse中用过maven嘛？

Question

我最近在Eclipse中使用maven时遇到个问题，一开始package没有问题，但是clean之后再package就会报错：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project module: Compilation failure
Unable to locate the Javac Compiler in:
  D:Javajre6..libtools.jar
Please ensure you are using JDK 1.4 or above and
not a JRE (the com.sun.tools.javac.Main class is required).
In most cases you can change the location of your Java
installation by setting the JAVA_HOME environment variable.
-> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluen ... ojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :module

我肯定我的jdk环境变量设置的没有问题。
估计是环境或者哪里设置出了问题，但是一直都不知道怎么解决。希望大家帮下忙~