HashMap 排序 key-value

HashMap  排序   根据 key  value  

Collections.sort(list, new Comparator<类型>(){这是java.util包下 compare方法  用compare比较ps:按照字典顺序比较的    });

public class MyWorld123 {

    public static void main(String[] args) {
        Map<String, String> map = new HashMap<String, String>();
        map.put("123", "ccccc");
        map.put("1231213", "aaaaa");
        map.put("11", "bbbbb");
        map.put("32", "ddddd");

        List<Map.Entry<String,String>> list = new ArrayList<Map.Entry<String,String>>(map.entrySet());
        Collections.sort(list, new Comparator<Map.Entry<String, String>>() {
            @Override
            public int compare(Map.Entry<String, String> o1, Map.Entry<String, String> o2) {
                return o1.getValue().compareTo(o2.getValue());
            }
        });

        for(Map.Entry<String,String> mapping:list){
            System.out.println(mapping.getKey()+":"+mapping.getValue());
        }

    }
}