Ant 构建不起作用：找不到 javac 编译器

我正在尝试运行一些Java EE示例。蚂蚁建议：Perhaps JAVA_HOME does not point to the JDK. It is currently set to "C:\Program Files\Java\jre7

我的变量是：当我看我的Windows 7变量时JAVA_HOMEC:\Program Files\Java\jdk1.7.0_03

但是，我的路径是（注意jdk1.6.0_26）：

%M2_HOME%\bin;%ANT_HOME%\bin;%JAVA_HOME%\bin;%SystemRoot%\system32;%SystemRoot%;
%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\;
C:\Program Files\Microsoft Application Virtualization Client;%M2%;
C:\Program Files\QuickTime\QTSystem\;C:\Program Files\TortoiseSVN\bin;
%GLASSFISH%;%GLASSFISH_PARENT%;

PATH=C:\Maven\apache-maven-2.2.1\bin;C:\Ant\apache-ant-1.8.2\bin;**C:\Program File
s\Java\jdk1.6.0_26\bin;**C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C
:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Microsoft Applicatio
n Virtualization Client;C:\Maven\apache-maven-2.2.1\bin;C:\Program Files\QuickTi
me\QTSystem\;C:\Program Files\TortoiseSVN\bin;C:\glassfish3\glassfish\bin;C:\gla
ssfish3\bin;C:\Sun\jwsdp-2.0\jwsdp-shared\bin

我是否必须执行任何特殊操作才能使窗口保存我的路径？

更多信息：

C:\javaeetutorial5\examples\web\hello2>ant
Unable to locate tools.jar. Expected to find it in C:\Program Files\Java\jre7\li
b\tools.jar
Buildfile: C:\javaeetutorial5\examples\web\hello2\build.xml

-pre-init:

init:

default-ear:

-pre-compile:

bpp-actual-compilation:
     [echo] Compiling hello2
     [echo] javaee.classpath.prefix is: C:\glassfish3/lib
     [echo] is.glassfish.v3 is: ${is.glassfish.v3}
    [javac] C:\javaeetutorial5\examples\bp-project\command-line-ant-tasks.xml:93
: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=las
t; set to false for repeatable builds

BUILD FAILED
C:\javaeetutorial5\examples\bp-project\command-line-ant-tasks.xml:93: 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.
It is currently set to "C:\Program Files\Java\jre7"

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