java map 按 value sort

import java.io.File;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Map.Entry;public class Statics {/** * 存放搜索关键词与相应的搜索次数 */private Map<String, Integer> keywordMap = new HashMap<String, Integer>();/** * 增加搜索关键词 *  * @param keyword */public void addKeyword(String keyword) {if (keywordMap.containsKey(keyword)) {int num = keywordMap.get(keyword);num++;keywordMap.put(keyword, num);} else {keywordMap.put(keyword, 1);}}/** * 进行按value值排序，从大到小 *  * @param keywordMap *            搜索关键词的hashMap * @return */public List<Entry<String, Integer>> sortKeywordMap(Map<String, Integer> keywordMap) {List<Entry<String, Integer>> arrayList = new ArrayList<Entry<String, Integer>>(keywordMap.entrySet());Collections.sort(arrayList, new Comparator<Entry<String, Integer>>() {public int compare(Entry<String, Integer> e1,Entry<String, Integer> e2) {return (e2.getValue()).compareTo(e1.getValue());}});for (Entry<String, Integer> entry : arrayList) {System.out.println(entry.getKey() + "  " + entry.getValue());}return arrayList;}/** * 对搜索关键词的hashMap 进行按value值排序，从大到小 *  * @return */public List<Entry<String, Integer>> sortKeywordMap() {return sortKeywordMap(keywordMap);}