按比较器排序映射

//package com.nowjava;/*来自 n o w  j a v a  . c o m*/


import java.util.Collections;

import java.util.Comparator;


import java.util.LinkedHashMap;

import java.util.LinkedList;

import java.util.List;

import java.util.Map;


public class Main {

    public static Map<String, Integer> sortByComparator(

            Map<String, Integer> unsortMap, final boolean order) {


        List<Map.Entry<String, Integer>> list = new LinkedList<Map.Entry<String, Integer>>(

                unsortMap.entrySet());

                /**
                 from
                * 时代Java - N o w  J a v a . c o m 
                **/

        // Sorting the list based on values

        Collections.sort(list,

                new Comparator<Map.Entry<String, Integer>>() {

                    public int compare(Map.Entry<String, Integer> o1,

                            Map.Entry<String, Integer> o2) {

                        if (order) {

                            return o1.getValue().compareTo(o2.getValue());

                        } else {

                            return o2.getValue().compareTo(o1.getValue());


                        }

                    }

                });


        // Maintaining insertion order with the help of LinkedList

        Map&