Map排序，Set排序

 

 

Map排序，

 

	public List<Map.Entry<Integer, String>> mapSort(Map map){
		List<Map.Entry<Integer, String>> infoIds = new ArrayList<Map.Entry<Integer, String>>(
				map.entrySet()); 
		Collections.sort(infoIds, new Comparator<Map.Entry<Integer,String >>() {
			public int compare(Map.Entry<Integer, String> o1,
			Map.Entry<Integer, String> o2) {
				return Collator.getInstance(Locale.CHINESE).compare(o1.getValue(), o2.getValue()); 
			}
		});
		return infoIds;
	}
	public List<Map.Entry<String, String>> mapStringSort(Map map){
		List<Map.Entry<String, String>> infoIds = new ArrayList<Map.Entry<String, String>>(
				map.entrySet()); 
		Collections.sort(infoIds, new Comparator<Map.Entry<String,String >>() {
			public int compare(Map.Entry<String, String> o1,
			Map.Entry<String, String> o2) {
				return Collator.getInstance(Locale.CHINESE).compare(o1.getValue(), o2.getValue()); 
			}
		});
		return infoIds;
	}

 

set排序，非常简单，实现一个treeSet即可

 

Set<Integer> treeSet = new TreeSet();
treeSet.addAll(depIdSet);
//depIdSet 是一个无序的set，
//最好的办法是在生产depIdSet时就用treesSet存储