"org.eclipse.wst.validation" has been removed

源：http://www.csdn123.com/html/topnews201408/65/13065.htm
评：

Same probleme here, there the solution I fix it

Open the .project file with your prefered text editor.

delete the node that is about "org.eclipse.wst.validation"

Close your project

Open your project

Launch Maven Update...

Should be good.

Another way to fix it, if you don't want to change your .project config (or if you had several projects that must be fixed)

Close your workspace (or eclipse)
-move out <WorkspaceDir>\.metadata\.plugins\org.eclipse.core.resources\.projects from the workspace directory

-reopen you workspace

close it again
-move back the .projects dir (say yes to replace questions ? )

open you workspace

Launch Maven Update

Should be good