![Map根据value值进行倒序排列 Map根据value值进行倒序排列](https://image.shishitao.com:8440/aHR0cHM6Ly9ia3FzaW1nLmlrYWZhbi5jb20vdXBsb2FkL2NoYXRncHQtcy5wbmc%2FIQ%3D%3D.png?!?w=700&webp=1)
public List<Map.Entry<Integer,BigDecimal>> sortByMapValue(HashMap<Integer, BigDecimal> map){
ArrayList<Map.Entry<Integer, BigDecimal>> list = new ArrayList<>(map.entrySet());
Collections.sort(list, new Comparator<Map.Entry<Integer, BigDecimal>>() {
@Override
public int compare(Map.Entry<Integer, BigDecimal> o1, Map.Entry<Integer, BigDecimal> o2) {
if (o1.getValue() == null || o2.getValue() == null){
return -1;
}
return o2.getValue().compareTo(o1.getValue());
}
});
return list;
}
参考文章;https://www.cnblogs.com/liujinhong/p/6113183.html