Relative road strength in jsp, full road strength
If the relative path in jsp is preceded by "/" (/web/a/g.jsp), it will be automatically matched with http://localhost:8080+ after "/" in front
If the relative path does not add "/" (a/g.jsp), then http://localhost:8080+the name of this project+relative road strength is automatically matched
Use "/../" (/../a/g.jsp) in the database to make the relative path not add the project name
jsp has http:// or ${pageContext.request.contextPath} to automatically identify as the whole way