Could not initialize class

Eclipse报错：Errors occurred during the build.
Errors running builder 'Faceted Project Validation Builder' on project 'lzfjr-site'.
Could not initialize class org.eclipse.jst.j2ee.project.facet.IJ2EEFacetConstants

求各位大神，帮忙解决啊

试试切换workspace，再不行，就更新eclipse（Help - check for updates）

找不到实体类 看看是不是hibernate 配置文件写错了。