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

参见：http://blog.csdn.net/fox_lht/article/details/16369147

解决方案：

1. 下载java jdk，并安装java jdk。下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

2. 在eclipse的菜单中，进入 Window > Preferences > Java > Installed JREs > Execution Environments，选择JavaSE-1.6, 在右侧选择jdk.

3. 然后在maven菜单中使用 “update project ...”.