feat:增加图表组件

lib/utils/index.dart

@@ -0,0 +1,17 @@
+import 'package:intl/intl.dart';
+
+/// 解析日期选择器
+String parseDatePickerSelected(Map<String, int> selected) {
+  final String year = selected['year'].toString().padLeft(4, '0');
+  final String month = selected['month'].toString().padLeft(2, '0');
+  final String day = selected['day'].toString().padLeft(2, '0');
+
+  return '$year-$month-$day';
+}
+
+/// 格式化时间
+String formatDateTime(DateTime dateTime, [String format = 'yyyy-MM-dd']) {
+  final DateFormat formatter = DateFormat(format);
+  // return formatter.format(dateTime);
+  return Intl.withLocale('zh_CN', () => formatter.format(dateTime));
+}