降序：

 static class MapComparatorDesc implements Comparator<Map<String, Object>> {@Overridepublic int compare(Map<String, Object> m1, Map<String, Object> m2) {Double v1 = Double.valueOf(m1.get("avgScore").toString());Double v2 = Double.valueOf(m2.get("avgScore").toString());if (v2 != null) {return v2.compareTo(v1);}return 0;}}

升序：

static class MapComparatorAsc implements Comparator> {@Overridepublic int compare(Map m1, Map m2) {Doublev1 = Double.valueOf(m1.get("avgScore").toString());Doublev2 = Double.valueOf(m2.get("avgScore").toString());if(v1 != null){return v1.compareTo(v2);}

使用：

Collections.sort(mapList, new MapComparatorDesc());