1.在eclipse导航栏中 Window->Show View->Project Explorer。
2.回到jar包点击右键就有build path了。
原文:https://blog.csdn.net/Bass_Liang/article/details/79842198?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-7.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-7.channel_param