java的Map集合中按value值进行排序输出的实例代码

import java.util.Arrays;import java.util.Comparator;import java.util.HashMap;import java.util.Map;import java.util.Set;public class Test {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);for(int i=0;i<entries.length;i++){System.out.println(entries[i]);}}public static Map.Entry[] getSortedHashtableByValue(Map map) {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) {Long key1 = Long.valueOf(((Map.Entry) arg0).getValue().toString());Long key2 = Long.valueOf(((Map.Entry) arg1).getValue().toString());return key1.compareTo(key2);}});return entries;}}