java－hashMap通过value排序

package test;

import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 * Created by 16/8/3.
 */
public class paixuMap {
    public static void main(String[] args) {
        Map<String ,Integer> map = new HashMap<String ,Integer>();
        map.put("aa", 22);
        map.put("bb", 11);
        map.put("cc", 44);
        map.put("dd", 33);
        map.put("ee", 55);
        Map.Entry[] entries= getSortedHashtableByValue(map,"DESC");
        for(int i=0;i<entries.length;i++)
        {
            System.out.println(entries[i]);
        }
    }

    /**
     * 根据HashMap的value排序
     * @param map HashMap
     * @param type ASC:正序(默认值) DESC:倒序
     * @return
     */
    public static Map.Entry[] getSortedHashtableByValue(Map map, final String type) {
        Set set = map.entrySet();
        Map.Entry[] entries = (Map.Entry[]) set.toArray(new Map.Entry[set.size()]);
        Arrays.sort(entries, new Comparator() {
            public int compare(Object arg0, Object arg1) {
                int result = 0;
                Long key1 = Long.valueOf(((Map.Entry) arg0).getValue().toString());
                Long key2 = Long.valueOf(((Map.Entry) arg1).getValue().toString());
                if(type != null && type.trim() != "" && "DESC".equals(type.toUpperCase())){
                    result = key2.compareTo(key1);
                }else {
                    result = key1.compareTo(key2);
                }
                return result;
            }
        });
        return entries;
    }

}