HashMap 按键排序 并且放入到 list 集合中

HashMap 按键排序 并且放入到 list 集合中

Map<String, String> map  =  new HashMap<String, String> ();
    	map.put("a1", "u");
    	map.put("a2", "d");
    	map.put("a5", "r");
    	map.put("a4", "f");
    	map.put("a3", "p");
    	List<Map<String, String>> list2 = new ArrayList<Map<String, String>>();
    	HashMap<String, String> map2= new HashMap<String, String>();
    	Map<String,String> sortedMap = new LinkedHashMap<String, String>();
    	List<String> list = new ArrayList<String>();
    	Iterator<String> item = map.keySet().iterator();
    	while(item.hasNext()){
    		list.add(item.next());
    	}
    	Collections.sort(list);
    	Iterator<String> items2 = list.iterator();
    	while(items2.hasNext()){
    		String key = items2.next();
    		sortedMap.put(key, map.get(key));
    	}
    	list2.add(sortedMap);
    	//*************** 结果
    	 for (Map<String, String> entry :list2) {
    		 for (String s : map.keySet()) {
    			 System.out.println(s+":"+map.get(s));
			}
 		}