Do not log request parameters for multipart requests

Closes spring-projectsgh-27350

Author: rstoyanchev

spring-webmvc/src/main/java/org/springframework/web/servlet/DispatcherServlet.java

@@ -978,7 +978,10 @@ protected void doService(HttpServletRequest request, HttpServletResponse respons
 	private void logRequest(HttpServletRequest request) {
 		LogFormatUtils.traceDebug(logger, traceOn -> {
 			String params;
-			if (isEnableLoggingRequestDetails()) {
+			if (StringUtils.startsWithIgnoreCase(request.getContentType(), "multipart/")) {
+				params = "multipart";
+			}
+			else if (isEnableLoggingRequestDetails()) {
 				params = request.getParameterMap().entrySet().stream()
 						.map(entry -> entry.getKey() + ":" + Arrays.toString(entry.getValue()))
 						.collect(Collectors.joining(", "));