修复查询可开票历史订单的数据展示逻辑，将从小到大变成了从大到小

xhpc-modules/xhpc-invoice/src/main/java/com/xhpc/invoice/service/impl/XhpcInvoiceServiceImpl.java

@@ -316,10 +316,23 @@ public class XhpcInvoiceServiceImpl implements XhpcInvoiceService {
         allGroupingRecords.put(monitor, split);
         //存放至包装类中
         Set<String> keys = allGroupingRecords.keySet();
+
+        //对key进行反向排序，保证封装的数据是反着的
+        ArrayList<String> tempKeyList = new ArrayList<>();
+        for (String key : keys) {
+            tempKeyList.add(key);
+        }
+        // 创建一个游标在迭代器末尾的迭代器
+        ListIterator<String> stringListIterator = tempKeyList.listIterator(tempKeyList.size());
+        // 然后反向遍历
+        ArrayList<String> keyList = new ArrayList<>();
+        while (stringListIterator.hasPrevious()) {
+            keyList.add(stringListIterator.previous());
+        }
         ArrayList<ItemsDTO> itemsDTOS = new ArrayList<>();
         //定义一个计数器，只要前3个月的记录
         int count = 0;
-        for (String key : keys) {
+        for (String key : keyList) {
             count++;
             if (count == 4) {
                 break;