arcgis pages can not be displayed in jsp project

[ShaosongMa]

In the original jsp project, you must add <base href = "<% = basePath%>">, but after adding <base href = "<% = basePath%>">, arcgis pages can not be displayed,
My acrgis jsp page references: https://developers.arcgis.com/javascript/latest/sample-code/sandbox/index.html? Sample = get-started-layers
I would like to ask how the jsp page contains <base href = "<% = basePath%>"> normal display arcgis jsp page.