The platform metadata area could not be written: C:\Windows\System32\workspace\.metadata. By default the platform writes its content under the current working directory when the platform is launched. Use the -data parameter to specify a different content area for the platform.
1.删除配置eclipse\jee-oxygen\eclipse\configuration\org.eclipse.update
2.返回上一目录\eclipse\jee-oxygen\eclipse
cmd 运行 eclipse -clean
备注：如果安装的插件，找不到，也可使用该方法。