java学习day17 --排序，时间比较，Ip转换，JSON格式

  BufferedReader reader = new BufferedReader(new FileReader("d:/data/movie.txt"));
        String len;
        while((len = reader.readLine())!=null) {
            Movie movie = JSON.parseObject(len,Movie.class);//进行转换

Movie m = new Movie(123,1,1234567,1);
String jsonString = JSON.toJSONString(m);

public static String getProvinceByLong(String ip) {
        long l = parseIpToLong(ip);
        int left = 0;
        int right = list.size()-1;
        int middle = 0;
        while(left<=right) {
            middle = (left+right)/2;
            Ip ip2 = list.get(middle);
            if(l>=ip2.getStartLongIp()&&l<=ip2.getEndLongIp()) {
                return list.get(middle).getProvince();
            }
            else if(l<ip2.getStartLongIp()) {
                right = middle-1;


            }else if(l>ip2.getEndLongIp()) {
                left = middle+1;

            }
        }
        return null;

    }

public static long parseIpToLong(String ip) {
        long longIp = 0l;
        if(ip==null){
            return longIp;
        }
        String[] split = ip.split("\\.");
        if(split.length == 4) {
            for(int i =0;i<4;i++) {
            long l = Long.parseLong(split[i]);
            longIp  |= l<<((3-i)<<3);
            }
        }
        return longIp;
    }

    /**
     * 排序
     * @return 
     */
    public static List<Entry<String,Integer>> sort(Map<String,Integer> map) {
        ArrayList<Entry<String,Integer>> list2 = new ArrayList<>(map.entrySet());
        Collections.sort(list2,new Comparator<Entry<String,Integer>>() {

            @Override
            public int compare(Entry<String, Integer> o1, Entry<String, Integer> o2) {
                // TODO Auto-generated method stub
                return o2.getValue()-o1.getValue();//降序
            }
        });
        return list2;
    }

                    String d1 = o1.getData();
                    String d2 = o2.getData();
                    SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
                    Date p1 = sd.parse(d1);
                    Date p2 = sd.parse(d2);
                    res =  p1.before(p2)?-1:1;