Maven 项目根目录下 mvn clean install -U 如果是 IDEA 内置的可以这样 "C:Program FilesJetBrainsIntelliJ IDEA 2019.3pluginsmavenlibmaven3inmvn" clean install -U
mvn clean install -U
"C:Program FilesJetBrainsIntelliJ IDEA 2019.3pluginsmavenlibmaven3inmvn" clean install -U
或者直接删了项目再删了 .m2 下的 repository