一，MapUtil

package com.util;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import java.util.Iterator;import java.util.LinkedHashMap;import java.util.List;import java.util.Map;import java.util.Map.Entry;public class MapUtil {		/**	 * 對map排序。	 */	public static Map<String, Double> sortMapByValue(Map<String, Double> oriMap) {  	    Map<String, Double> sortedMap = new LinkedHashMap<String, Double>();  	    if (oriMap != null && !oriMap.isEmpty()) {  	        List<Map.Entry<String, Double>> entryList = new ArrayList<Map.Entry<String, Double>>(oriMap.entrySet());  	        Collections.sort(entryList,  	                new Comparator<Map.Entry<String, Double>>() {  	                    public int compare(Entry<String, Double> entry1,  	                            Entry<String, Double> entry2) {  	                        double value1 = 0, value2 = 0;  	                        try {  	                            value1 = entry1.getValue() * 1000;  	                            value2 = entry2.getValue() * 1000; 	                        } catch (NumberFormatException e) {  	                            value1 = 0;  	                            value2 = 0;  	                        }  	                        return (int) (value2 - value1);  	                    }  	                });  	        Iterator<Map.Entry<String, Double>> iter = entryList.iterator();  	        Map.Entry<String, Double> tmpEntry = null;  	        while (iter.hasNext()) {  	            tmpEntry = iter.next();  	            sortedMap.put(tmpEntry.getKey(), tmpEntry.getValue());  	        }  	    }  	    return sortedMap;  	}}
二，測試
public static void main(String[] args) {		Map<String,Double> map = new LinkedHashMap<String,Double>();		map.put("no1", 2.25);		map.put("no2", 4.4);		map.put("no3", 10.0);		map.put("no4", 3.51);		map.put("no5", 2.05);		map.put("no6", 13.1);		map.put("no7", 9.77);		//對map的value值排序		Map<String,Double> sortMap = MapUtil.sortMapByValue(map);		System.out.PRintln(sortMap);		}
三，打印結果：
{no6=13.1, no3=10.0, no7=9.77, no2=4.4, no4=3.51, no1=2.25, no5=2.05}