List集合Map按某个属性或者字段进行升降排序示例

		List<Map<String, Object>> dataList = new ArrayList<Map<String, Object>>();
		dataList.add(new HashMap<String,Object>(){
			{
				put("bank_id","1");
				put("question_type","0");
			}
		});
		dataList.add(new HashMap<String,Object>(){
			{
				put("bank_id","2");
				put("question_type","2");
			}
		});
		dataList.add(new HashMap<String,Object>(){
			{
				put("bank_id","3");
				put("question_type","1");
			}
		});
		dataList.add(new HashMap<String,Object>(){
			{
				put("bank_id","4");
				put("question_type","0");
			}
		});
		dataList.add(new HashMap<String,Object>(){
			{
				put("bank_id","5");
				put("question_type","1");
			}
		});
		
		// 排序-升序
		List<Map<String, Object>> newAscList = dataList.stream()
				.sorted(Comparator.comparing((Map m) -> (new BigDecimal(m.get("question_type").toString()))))
				.collect(Collectors.toList());
		log.info("对类型升序排序后:{}", newAscList);

		// 排序-降序
		List<Map<String, Object>> newDescList = dataList.stream()
				.sorted(Comparator.comparing((Map m) -> (new BigDecimal(m.get("question_type").toString()))).reversed())
				.collect(Collectors.toList());
		log.info("对类型降序排序后:{}", newDescList);

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