[JAVA]로또 역대 당첨번호 통계

package imperfect;
 
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.io.BufferedReader;
import java.io.InputStreamReader;
 
public class alpha {
    private static String Address;
    private static URL url;
    private static BufferedReader br;
    private static HttpURLConnection conn;
    private static String protocol = "GET";
    private static int drwNo_;
 
    public static void main(String[] args) throws Exception {
 
        drwNo_ = 783;
        int drwNo = drwNo_;
        int[][] frequency = new int[2][drwNo_ * 6];
        int i = 1;
 
        for (; drwNo >= 1; drwNo--) {
 
            System.out.println("-------" + drwNo + "-------");
            String pattern1 = "alt=\"";
            String pattern2 = "\"/>";
            Pattern p = Pattern.compile(pattern1 + "(.*?)" + pattern2);
 
            Address = "http://www.nlotto.co.kr/gameResult.do?method=byWin&drwNo=" + drwNo;
            url = new URL(Address);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod(protocol);
 
            br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "MS949"));
 
            Matcher m;
 
            String line;
 
            while ((line = br.readLine()) != null) {
 
                if (line.startsWith("                         <img src=")) {
                    m = p.matcher(line);
                    while (m.find()) {
                        System.out.println(m.group(1));
                        frequency[0][drwNo_ * 6 - i] = Integer.parseInt(m.group(1));
                        i++;
                    }
                }
 
                if (line.startsWith("                         <span class=\"number")) {
                    System.out.println("Bonus");
                    m = p.matcher(line);
                    while (m.find()) {
                        System.out.println(m.group(1));
                        frequency[1][drwNo * 3 - 1] = Integer.parseInt(m.group(1));
                    }
                }
            }
        }
 
        String[][] chart = new String[2][45];
        int[][] chart_num = new int[2][45];
        int count = 0;
 
        // chart initialize
        for (int j = 0; j <= 1; j++) {
            for (String str : chart[j]) {
                chart[j][count] = "";
                chart_num[j][count] = 0;
                count++;
            }
            count = 0;
        }
 
        count = 1;
        int main_total = 0, bonus_total = 0, out_total = 0;
        for (int type = 0; type <= 1; type++) {
 
            for (int num : frequency[type]) {
                if (num != 0) {
                    chart[type][num - 1] += "■";
                    chart_num[type][num - 1]++;
                }
            }
 
            for (int j = 0; j < 45; j++) {
                if (type == 0) {
                    main_total += chart_num[type][j];
                } else {
                    bonus_total += chart_num[type][j];
                }
            }
 
            if (type == 0) {
                System.out.println("Main Number Frequency");
                out_total = main_total;
            } else {
                System.out.println("Bonus Number Frequency");
                out_total = bonus_total;
            }
            for (String str : chart[type]) {
                if (count < 10) {
                    System.out.print("0");
                }
                String percent = String.format("%.2f", ((double) chart_num[type][count - 1] / out_total) * 100.0);
                System.out.println(count + ":" + str + chart_num[type][count - 1] + "(" + percent + "%)");
                count++;
            }
            count = 1;
        }
        System.out.println("Total Number Graph");
        for (int j = 0; j < 45; j++) {
            if (count < 10) {
                System.out.print("0");
            }
            String percent = String.format("%.2f",
                    (((double) chart_num[0][j] + chart_num[1][j]) / (main_total + bonus_total)) * 100.0);
            System.out.println(
                    count + ":" + chart[0][j] + chart[1][j] + (chart_num[0][j] + chart_num[1][j]) + "(" + percent + "%)");
            count++;
        }
    }
}

1회부터 drwNo회까지의 로또 추첨 번호를 파싱하여 가져옴.

매 회차 당첨번호를 출력하며, 메인번호(6자리), 보너스번호, 전체(7자리) 통계를 수치,비율과 함께 막대 그래프로 보여줌.

아래는 1회~783회까지의 통계 결과

Last_Lotto.txt

참고링크.

http://jwchoi85.tistory.com/42

http://egloos.zum.com/penta82/v/4099027

https://stackoverflow.com/questions/11255353/java-best-way-to-grab-all-strings-between-two-strings-regex

https://jhkim2017.wordpress.com/2017/04/24/java-throws%EC%99%80-throw%EC%9D%98-%EC%B0%A8%EC%9D%B4/

https://blog.naver.com/occidere/220796488866