可信证书增加格式校验错误提示

src/main/java/com/nis/web/controller/configuration/proxy/PxyObjKeyringController.java

@@ -587,6 +587,8 @@ public class PxyObjKeyringController extends BaseController {
 			logger.error("证书文件校验失败", e);
 			if (e instanceof MaatConvertException) {
 				addMessage(redirectAttributes, "error", e.getMessage());
+			} else if (e instanceof MultiPartNewException) {
+				addMessage(redirectAttributes, "error", e.getMessage());
 			} else {
 				addMessage(redirectAttributes, "error", "save_failed");
 			}