public static void main(String[] args) {
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Map<String, Object> map1 = new HashMap<String, Object>();
map1.put("name", "張三");
map1.put("total", "5");
Map<String, Object> map2 = new HashMap<String, Object>();
map2.put("name", "李四");
map2.put("total", "12");
Map<String, Object> map3 = new HashMap<String, Object>();
map3.put("name", "王五");
map3.put("total", "31");
list.add(map1);
list.add(map3);
list.add(map2);
//排序前
for (Map<String, Object> map : list) {
System.out.println(map.get("total"));
}
//比較兩個對象的順序,如果前者小於、等於或者大於後者,則分別返回-1/0/1,逆序的話就用o2.compareTo(o1)即可
Collections.sort(list, new Comparator<Map<String, Object>>() {
public int compare(Map<String, Object> o1, Map<String, Object> o2) {
Integer name1 = Integer.valueOf(o1.get("total").toString()) ;//name1是從你list裏面拿出來的一個
Integer name2 = Integer.valueOf(o2.get("total").toString()) ; //name2是從你list裏面拿出來的第二個name
return name1.compareTo(name2);
}
});
//排序後
System.out.println("-------------------");
for (Map<String, Object> map : list) {
System.out.println(map.get("total"));
}
}