No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK

在eclipse中使用maven进行compile时，出现了“No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK”错误，从表面意思我们大概能看出，其实就是使用了JRE而不是JDK。  修改一下Eclipse配置就好了，如下图：   画红线的地方其实是我修改后，

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