listmap指定内部字段排序

升序或降序实现如下
Collections.sort(List, new Comparator<Map<String, Object>>() {
@Override
public int compare(Map<String, Object> map1, Map<String, Object> map2) {
// map1,map2是list中的Map,可以在其内取得值,按其排序,s1和s2是排序字段值
Date s1 = (Date) map1.get("publishtime");
Date s2 = (Date) map2.get("publishtime");
if (s1.before(s2)) {
return 1;
} else {
return -1;
}
}
});
原文地址:https://www.cnblogs.com/liushuaibiao/p/12848586.html