报错内容Circular view path [index]: would dispatch back to the current handler URL [/login/index] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default

项目报错，程序包org.springframework.stereotype不存在File——SettingBuild, Execution, Deployment——Runner勾选Delegate IDE build/run actions to Maven意思是 将IDE构建/运行操作委托给Maven再运行Tomcat，成功

IDEA新建项目，运行报错Cannot resolve plugin org.apache.maven.plugins:maven-site-plugin:3.3遇到这个问题，判断是maven版本不一致File——SettingBuild，Execution，Deployment——Build Tools——Maven把Maven home directory，User settings file

tomcat启动失败，报以下的错，找了好久解决方法一：检查你的maven本地仓库路径是否正确把这个选项勾上，开启自动加载jar包在maven项目中重新刷新导入解决方法二：Project Structure——Artifacts，添加lib文件夹，导入jar包再重启tomcat解决方法三：清理缓存，重新启动在命令行输入mvn idea:idea，自动下载jar包启动tomcat成功...