fix: 后端数据修改格式

newstock-system/src/main/java/com/ruoyi/newstocksystem/service/impl/TTrendsServiceImpl.java

@@ -1,5 +1,6 @@
 package com.ruoyi.newstocksystem.service.impl;
 
+import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.HashMap;
@@ -133,6 +134,9 @@ public class TTrendsServiceImpl implements TTrendsService
     @Override
     public List<?> listTrendsSection(TTrends tTrends)
     {
+        // 创建日期格式化对象，用于将Date转换为字符串
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+        
         // 1. 获取当前传入参数的所有趋势排名数据list
         List<TTrends> currentDayTrends = tTrendsMapper.getTrendsByDateAndType(tTrends);
         if (currentDayTrends == null || currentDayTrends.isEmpty()) {
@@ -178,7 +182,8 @@ public class TTrendsServiceImpl implements TTrendsService
             for (int i = 0; i < previousDays.size(); i++) {
                 Date tradeDate = previousDays.get(i);
                 Integer rank = dateRankMap.get(tradeDate);
-                industryData.put("day_" + (i + 1), rank != null ? rank : -1);
+                // 使用交易日期字符串作为key值
+                industryData.put(sdf.format(tradeDate), rank != null ? rank : -1);
             }
             
             resultList.add(industryData);