Collections.sort(order_from_list, new Comparator<Map<Object, Object>>() {

            public int compare(Map<Object, Object> o1, Map<Object, Object> o2) {

                int map1value = (Integer) o1.get("pkey");

                int map2value = (Integer) o2.get("pkey");

                return map1value - map2value;

            }

        });

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

public class $ {

    public static void main(String[] args) {

        List<Map<String, String>> list = new ArrayList<Map<String, String>>();

        list.add(getData());

        list.add(getData());

        list.add(getData());

        list.add(getData());

        list.add(getData());

        System.out.println("排序前" + list);

        Collections.sort(list, new Comparator<Map<String, String>>() {

            public int compare(Map<String, String> o1, Map<String, String> o2) {

                return o1.get("countScore").compareTo(o2.get("countScore"));

            }

        });

        System.out.println("排序后" + list);

    }

    private static Map<String, String> getData(int num) {

        Map<String, String> map = new HashMap<String, String>();

        map.put("countScore", String.valueOf(num));

        return map;

    }

}

   list格式:

    [

{

    stype=source_from,

    pkey=132,

    pname=BJ,

    codea=,

    codeb=,

    codec=,

    coded=,

    codee=,

    dflag=,

    sortby=2,

    vflag=add,

    comments=来源,

    source_from=SS

},

{

    stype=source_from,

    pkey=134,

    pname=DD,

    codea=,

    codeb=,

    codec=,

    coded=,

    codee=,

    dflag=,

    sortby=0,

    vflag=add,

    comments=来源,

    source_from=ECS

}

]