java.home是一个System属性，通常指向jre目录，并且指向一个不存在的jar时会出现错误.

java.home is a System property which generally points to the jre directory and you are getting an error as you have pointed to a jar which doesn't exist.

如果要在pom文件中引用环境变量，请使用以下语法.

In case you want to refer to an environment variable within your pom file, use the below syntax.

${env.variable_name}

根据您的情况，应为${env.JAVA_HOME}，如下所示

In your case, it should be ${env.JAVA_HOME} as seen below

<dependency>
   <groupId>com.sun</groupId>
   <artifactId>tools</artifactId>
   <version>1.6.0</version>
   <scope>system</scope>
   <systemPath>${env.JAVA_HOME}/lib/tools.jar</systemPath>
 </dependency>

更新:正如lexicore所提到的，由于MAC JDK具有不同的文件结构，因此这不适用于MAC.

Update: As lexicore has mentioned, this wont work with MAC as the MAC JDK has a different file structure.