Util工具类 对map中含有String类型的日期key值的list进行排序

/**
* 对含有map的list排序
*
* @param areaList 原始值
* @param isDesc   TRUE：从大到小  FALSE：从小到大
*/
public static void sortListMap(List<Map.Entry<String, Double>> areaList, final boolean isDesc) {
Collections.sort(areaList, new Comparator<Map.Entry<String, Double>>() {
public int compare(Map.Entry<String, Double> o1,
Map.Entry<String, Double> o2) {
int flag = 1;
if (isDesc) {
if (o2.getValue() - o1.getValue() < 0) {
flag = -1;
}
} else {
if (o2.getValue() - o1.getValue() > 0) {
flag = -1;
}
}

return flag;
}
});
}

/**
* 对map中含有String类型的日期key值的list进行排序
* <p>
* 2017年9月29日 17:19:09
* xj
*
* @param list   List<Map<String,Object>>,String为日期
* @param format 日期格式
* @param isDesc TRUE：从大到小  FALSE：从小到大
*/
public static void sortListStringDateMap(List list, final String format, final boolean isDesc) {
Collections.sort(list, new Comparator() {
@Override
public int compare(Object o1, Object o2) {
Map<String, Object> o1Map = (Map<String, Object>) o1;
Map<String, Object> o2Map = (Map<String, Object>) o2;
String o1Key = "";
for (String key : o1Map.keySet()) {
o1Key = key;
}
String o2Key = "";
for (String key : o2Map.keySet()) {
o2Key = key;
}
Integer o1K = Integer.valueOf(Util.transformDateToString(Util.transformStringToDate(o1Key, format), "yyyyMMdd"));
Integer o2K = Integer.valueOf(Util.transformDateToString(Util.transformStringToDate(o2Key, format), "yyyyMMdd"));
int flag = 1;
if (isDesc) {
if (o2K - o1K < 0) {
flag = -1;
}
} else {
if (o2K - o1K > 0) {
flag = -1;
}
}

return flag;
}
});
}