1
ServerHttpRequest.Builder builder = request.mutate();
2
if (StringUtils.isNotBlank(userId)) {
3
    builder.header("userId", userId);
4
}
5

6
String userTempId = request.getHeaders().getFirst("userTempId");
7
if (StringUtils.isBlank(userTempId)) {
8
    HttpCookie cookie = request.getCookies().getFirst("userTempId");
9
    if (cookie != null) {
10
        userTempId = cookie.getValue();
11
    }
12
}
13

14
if (StringUtils.isNotBlank(userTempId)) {
15
    builder.header("userTempId", userTempId);
16
}

1
String userCartKey = buildKey(userId);
2
String userTempCartKey = buildKey(userTempId);
3

4
RMap<Long, CartInfoDTO> userMap =
5
        redissonClient.getMap(userCartKey);
6
RMap<Long, CartInfoDTO> tempMap =
7
        redissonClient.getMap(userTempCartKey);
8

9
List<CartInfoDTO> userItems = userMap.values().stream()
10
        .sorted(Comparator.comparing(
11
                CartInfoDTO::getUpdateTime).reversed())
12
        .collect(Collectors.toList());
13

14
List<CartInfoDTO> tempItems = tempMap.values().stream()
15
        .sorted(Comparator.comparing(
16
                CartInfoDTO::getUpdateTime).reversed())
17
        .collect(Collectors.toList());

1
if (StringUtils.isBlank(userId)) {
2
    return tempItems;
3
}
4

5
if (CollectionUtils.isEmpty(tempItems)) {
6
    return userItems;
7
}
8

9
List<CartInfoDTO> merged =
10
        mergeCartSimple(userItems, tempItems);
11

12
List<CartInfoDTO> sorted = merged.stream()
13
        .sorted(Comparator.comparing(
14
                CartInfoDTO::getUpdateTime).reversed())
15
        .collect(Collectors.toList());
16

17
for (CartInfoDTO item : sorted) {
18
    userMap.put(item.getSkuId(), item);
19
}
20

21
tempMap.delete();
22
return sorted;

1
private List<CartInfoDTO> mergeCartSimple(
2
        List<CartInfoDTO> userItems,
3
        List<CartInfoDTO> tempItems) {
4

5
    Map<Long, CartInfoDTO> index = userItems.stream()
6
            .collect(Collectors.toMap(
7
                    CartInfoDTO::getSkuId,
8
                    Function.identity(),
9
                    (first, second) -> first));
10

11
    tempItems.forEach(tempItem -> {
12
        CartInfoDTO userItem = index.get(tempItem.getSkuId());
13

14
        if (userItem != null) {
15
            userItem.setSkuNum(
16
                    userItem.getSkuNum() + tempItem.getSkuNum());
17

18
            userItem.setIsChecked(
19
                    tempItem.getIsChecked() == 0
20
                    && userItem.getIsChecked() == 0 ? 0 : 1);
21

22
            if (tempItem.getUpdateTime()
23
                    .after(userItem.getUpdateTime())) {
24
                userItem.setUpdateTime(tempItem.getUpdateTime());
25
            }
26
        } else {
27
            index.put(tempItem.getSkuId(), tempItem);
28
        }
29
    });
30

31
    return new ArrayList<>(index.values());
32
}