Java
List<Map<String, Object>> maps 정렬
doopang
2025. 3. 28. 10:21
1. list
# asc
maps.sort((map1, map2) -> {
Integer seq1 = Integer.parseInt(map1.get("seq").toString());
Integer seq2 = Integer.parseInt(map2.get("seq").toString());
return seq1.compareTo(seq2);
});
# desc
maps.sort((map1, map2) -> {
Integer seq1 = Integer.parseInt(map1.get("seq").toString());
Integer seq2 = Integer.parseInt(map2.get("seq").toString());
return seq2.compareTo(seq1);
});
2. stream()
# asc
maps = maps.stream()
.sorted(Comparator.comparing(m -> Integer.parseInt(m.get("seq").toString())))
.collect(Collectors.toList());
# desc
maps = maps.stream()
.sorted(Comparator.comparing(m -> Integer.parseInt(m.get("seq").toString()), Comparator.reverseOrder()))
.collect(Collectors.toList());
maps = maps.stream()
.sorted(Comparator.comparing((Map<String, Object> m) -> Integer.parseInt(m.get("seq").toString())).reversed())
.collect(Collectors.toList());