利用Comparator对枚举类型进行排序的实现

1. 利用BeanComparator对List<Object>根据属性进行排序

        String daXiaoOrder[] = {"很小","小","中","大"，"特大"};
        String tianDuOrder[] = {"不甜","甜","很甜"}
        ComparatorChain comparatorChain = new ComparatorChain();
        FixedOrderComparator fixedOrderComparator1 = new FixedOrderComparator(daXiaoOrder);
        FixedOrderComparator fixedOrderComparator2 = new FixedOrderComparator(tianDuOrder); 
         //daXiao 和 tianDu 是Apple类的成员变量   
        comparatorChain.addComparator(new BeanComparator("daXiao",fixedOrderComparator1)); 
        comparatorChain.addComparator(new BeanComparator("tianDu",fixedOrderComparator2));
        Collections.sort(appleList, comparatorChain);

 

2. 利用Comparator对List<String>排序

  

public static final Map<String, Integer> CHANNEL_ORDER_MAP = new HashMap<String, Integer>() {
        private static final long serialVersionUID = -8011287503097413378L;

        {
            put("A", 0);
            put("B", 1);
            put("C", 2);
            put("D+", 3);
            put("E", 4);
            put("F", 5);
            put("G", 6);
            put("H", 7);
            put("I", 8);
            put("J", 9);
            put("K", 10);
        }
    };

    /**
     * 对渠道类型编码排序
     *
     * @param list 排序列表
     */
    public static void sortChannel(List<String> list) {
        // 进行排序操作
        list.sort(new Comparator() {
            @Override
            public int compare(Object o1, Object o2) {
                // 处理不存在指定排序列表中的字符串
                if (CHANNEL_ORDER_MAP.get(o1) == null || CHANNEL_ORDER_MAP.get(o2) == null) {
                    return 1;
                }
                return CHANNEL_ORDER_MAP.get(o1).compareTo(CHANNEL_ORDER_MAP.get(o2));
            }
        });
    }