Please see
The problem is caused by the fact that the STS (the Spring IDE/Eclipse) uses the m2e(clipse) plugin but that eclipse:eclipse has been probably been run on the project. When m2e encounters a "var" .classpath entry, it throws this error.
In order to fix this problem, you need to do the following:
Make sure that the version of the m2e(clipse) plugin that you’re running is at least 1.1.0, and preferably, the latest available. The update site is the following url:(1.3.1, at the moment).
Disable the maven nature for the project (via the right-click menu)
run mvn eclipse:clean(while your project is openin STS/eclipse)
re-enable the maven nature.(Most of the time, this can be done by right-clicking on the project in question in the package explorer pane, and then choosing ‘Configure’-> ‘Convert to Maven Project’)
来自新浪博客：
，而其实你还爱着他，你一点也不好。
