eclipse项目导入后，项目图标右上角有红叉 参考博客： https://blog.csdn.net/Love_Basketballer/article/details/78747553?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.channel_param