程序运行后 “Executable extension definition for "class" not found.” 查找发现plugin.xml 扩展点 editors上 class 对应的类不小心被删除 browse找出来保存即可     详细报错 org.eclipse.core.runtime.CoreException: Executable extension def

Unable to open editor, unknown editor ID: "xxxxx"   at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3064)  at org.eclipse.ui.internal.WorkbenchPage.access$21(WorkbenchPag