前言
上一篇介绍了双色球走势图是怎么实现的,这一篇介绍怎么实现爬虫所有的双色球历史数据,也可以同步分享怎么同步福彩3D数据。采用的C#来实现的。
同步双色球的地址:https://datachart.500.com/ssq/history/newinc/history.php?start={0}&end={1}
同步福彩3D的地址:https://datachart.500.com/sd/history/inc/history.php?start={0}&end={1}
上一篇介绍走势图的实现:https://www.cnblogs.com/luoyuhao/p/13887935.html
打开网站显示的数据如下:
实现爬虫的过程
创建接收存储双色球历史数据的table
抓取网站上的html ,再通过html 去解析相应的数据。
通过以上截取后就只剩下需要的双色球的历史数据了,再去截取tr td数据,就相应能到得到相应的数据了,是不是很简单的一件事呀!
解析tr所有数据
/// <summary> /// 双色球TR /// </summary> /// <param name="wnRepo"></param> /// <param name="content"><tbody></tbody>之间的内容</param> private void ResolveSSQTr(string content) { string trContent = string.Empty; Regex regex = new Regex("<tr class=\"t_tr1\">"); //在<tbody></tbody>之间的内容搜索所有匹配<tr>的项 MatchCollection matches = regex.Matches(content); foreach (Match item in matches) { //如果当前匹配项的下一个匹配项的值不为空 if (!string.IsNullOrEmpty(item.NextMatch().Value)) { trContent = content.Substring(item.Index, item.NextMatch().Index - item.Index); } //最后一个<tr>的匹配项 else { trContent = content.Substring(item.Index, content.Length - item.Index); } DataRow dr = ssqdt.NewRow(); ResolveSSQTd(ref dr, trContent); ssqdt.Rows.Add(dr); } }
解析所有td内容
/// <summary> /// 双色球TD /// </summary> /// <param name="dr"></param> /// <param name="trContent"></param> private void ResolveSSQTd(ref DataRow dr, string trContent) { List<int> redBoxList = null; //匹配期号的表达式 string patternQiHao = "<td>"; Regex regex = new Regex(patternQiHao); Match qhMatch = regex.Match(trContent); dr["QiHao"] = trContent.Substring(qhMatch.Index + 13 + patternQiHao.Length, 5); if (int.Parse(trContent.Substring(qhMatch.Index + 13 + patternQiHao.Length, 5)) % 2 == 0) { dr["Type"] = "双期"; } else { dr["Type"] = "单期"; } //存放匹配出来的红球号码 redBoxList = new List<int>(); //匹配红球的表达式 string patternChartBall = "<td class=\"t_cfont2\">"; regex = new Regex(patternChartBall); MatchCollection rMatches = regex.Matches(trContent); foreach (Match r in rMatches) { redBoxList.Add(Convert.ToInt32(trContent.Substring(r.Index + patternChartBall.Length, 2))); } //匹配红球的表达式 patternChartBall = "<td class=\"t_cfont4\">"; regex = new Regex(patternChartBall); rMatches = regex.Matches(trContent); foreach (Match r in rMatches) { dr["B"] = Convert.ToInt32(trContent.Substring(r.Index + patternChartBall.Length, 2)); break; } patternChartBall = @"\d{4}-\d{2}-\d{2}"; regex = new Regex(patternChartBall); rMatches = regex.Matches(trContent); foreach (Match r in rMatches) { DateTime dt = Convert.ToDateTime(r.Value); dr["OpenDate"] = dt; dr["Week"] = CaculateWeekDay(dt.Year, dt.Month, dt.Day); } //排序红球号码 redBoxList.Sort(); //红球号码 dr["R1"] = redBoxList[0]; dr["R2"] = redBoxList[1]; dr["R3"] = redBoxList[2]; dr["R4"] = redBoxList[3]; dr["R5"] = redBoxList[4]; dr["R6"] = redBoxList[5]; dr["HTML"] = trContent; }
保存所解析的数据保存到SQLite
if (!Directory.Exists(tempPath))//判断文件夹是否存在 Directory.CreateDirectory(tempPath);//创建文件夹在根目录下 string _db = System.IO.Path.Combine(tempPath, "cpdb.dll"); SQLiteHelper helper = new SQLiteHelper(_db); OperResult oper = new OperResult(); helper.ExecuteNonQuery(string.Format("drop table if exists {0}", ssqtableName), _db); string msg = string.Format("create table if not exists {0} (\r\n", ssqtableName); for (int i = 0; i < ssqdt.Columns.Count; i++) { msg += string.Format("{0} {1},\r\n", ssqdt.Columns[i].ColumnName, helper.TypeToSqliteType(ssqdt.Columns[i].DataType)); } msg = msg.Remove(msg.LastIndexOf(",\r\n"), 3); msg += ")"; oper = helper.ExecuteNonQuery(msg, _db); oper = helper.SaveDataTable(ssqdt, ssqtableName);
获取网页内容的方法
public static string HttpGet(string url,string encoding) { WebRequest request = HttpWebRequest.Create(url); WebResponse response = request.GetResponse(); Stream stream = response.GetResponseStream(); StreamReader reader = new StreamReader(stream, Encoding.GetEncoding(encoding)); string content = reader.ReadToEnd(); return content; }
基姆拉尔森计算公式计算日期
/// <summary> /// 基姆拉尔森计算公式计算日期 /// </summary> /// <param name="y">年</param> /// <param name="m">月</param> /// <param name="d">日</param> /// <returns>星期几</returns> protected string CaculateWeekDay(int y, int m, int d) { if (m == 1 || m == 2) { m += 12; y--; //把一月和二月看成是上一年的十三月和十四月,例:如果是2004-1-10则换算成:2003-13-10来代入公式计算。 } int week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7; string weekstr = ""; switch (week) { case 0: weekstr = "周一"; break; case 1: weekstr = "周二"; break; case 2: weekstr = "周三"; break; case 3: weekstr = "周四"; break; case 4: weekstr = "周五"; break; case 5: weekstr = "周六"; break; case 6: weekstr = "周日"; break; } return weekstr; }
保存完后,显示的形式就是以DLL结尾的文件了,如下图:
怎么读取保存的双色球数据
string _db = System.IO.Path.Combine(tempPath, "cpdb.dll"); SQLiteHelper helper = new SQLiteHelper(_db); OperResult oper = new OperResult(); oper = helper.GetDataSet(string.Format("select * from {0}", ssqtableName), _db); if (oper.State == 1 && oper.DataSet != null && oper.DataSet.Tables.Count > 0 && oper.DataSet.Tables[0].Rows.Count > 0) { ViewBag.QiHao = "第" + oper.DataSet.Tables[0].Rows[0]["QiHao"] + "期"; ViewBag.B = oper.DataSet.Tables[0].Rows[0]["B"].ToString().Length == 1 ? "0" + oper.DataSet.Tables[0].Rows[0]["B"].ToString() : oper.DataSet.Tables[0].Rows[0]["B"].ToString(); ViewBag.R1 = oper.DataSet.Tables[0].Rows[0]["R1"].ToString().Length == 1 ? "0" + oper.DataSet.Tables[0].Rows[0]["R1"].ToString() : oper.DataSet.Tables[0].Rows[0]["R1"].ToString(); ViewBag.R2 = oper.DataSet.Tables[0].Rows[0]["R2"].ToString().Length == 1 ? "0" + oper.DataSet.Tables[0].Rows[0]["R2"].ToString() : oper.DataSet.Tables[0].Rows[0]["R2"].ToString(); ViewBag.R3 = oper.DataSet.Tables[0].Rows[0]["R3"].ToString().Length == 1 ? "0" + oper.DataSet.Tables[0].Rows[0]["R3"].ToString() : oper.DataSet.Tables[0].Rows[0]["R3"].ToString(); ViewBag.R4 = oper.DataSet.Tables[0].Rows[0]["R4"].ToString().Length == 1 ? "0" + oper.DataSet.Tables[0].Rows[0]["R4"].ToString() : oper.DataSet.Tables[0].Rows[0]["R4"].ToString(); ViewBag.R5 = oper.DataSet.Tables[0].Rows[0]["R5"].ToString().Length == 1 ? "0" + oper.DataSet.Tables[0].Rows[0]["R5"].ToString() : oper.DataSet.Tables[0].Rows[0]["R5"].ToString(); ViewBag.R6 = oper.DataSet.Tables[0].Rows[0]["R6"].ToString().Length == 1 ? "0" + oper.DataSet.Tables[0].Rows[0]["R6"].ToString() : oper.DataSet.Tables[0].Rows[0]["R6"].ToString(); }
以上即完成双色球历史数据的爬虫和保存数据的全部过程,思路非常清晰,而且方法容易,这样就不需要调用收费的接口了,为开发双色球走势图打好良好的基础 ,大家有没有觉得非常容易呀!其实爬虫的方法很多,希望跟大家一起交流学习了,也可以通过正则表达是来获取相应的数据,也可以用第三方工具去解析更简单快捷,曾经我也做过相应的爬虫,还挺好玩的。
爬虫福彩3D数据
同样显示创建接收数据的表结构来接收数据。
解析tr数据
string trContent = string.Empty; Regex regex = new Regex("<tr>"); //在<tbody></tbody>之间的内容搜索所有匹配<tr>的项 MatchCollection matches = regex.Matches(content); foreach (Match item in matches) { //如果当前匹配项的下一个匹配项的值不为空 if (!string.IsNullOrEmpty(item.NextMatch().Value)) { trContent = content.Substring(item.Index, item.NextMatch().Index - item.Index); } //最后一个<tr>的匹配项 else { trContent = content.Substring(item.Index, content.Length - item.Index); } //DataRow dr = sddt.NewRow(); ResolveSDSJTd(trContent); //sddt.Rows.Add(dr); }
解析td数据
private void ResolveSDSJTd(string trContent) { string patternChartBall = @"[1-9]\d{6}"; Regex regex = new Regex(patternChartBall); MatchCollection rMatches = regex.Matches(trContent); string qihao = ""; foreach (Match r in rMatches) { qihao = r.Value; break; } patternChartBall = "<td class=\"chartBall01\" width=18>"; regex = new Regex(patternChartBall); rMatches = regex.Matches(trContent); List<int> redBoxList = new List<int>(); foreach (Match r in rMatches) { int xx = int.Parse(trContent.Substring(r.Index + patternChartBall.Length, 1)); redBoxList.Add(xx); } if (!string.IsNullOrEmpty(qihao)) { DataRow[] dr = sddt.Select(string.Format("QiHao='{0}'", qihao)); if (dr.Length > 0) { dr[0]["R4"] = redBoxList[0]; dr[0]["R5"] = redBoxList[1]; dr[0]["R6"] = redBoxList[2]; } } }
保存数据
if (!Directory.Exists(tempPath))//判断文件夹是否存在 Directory.CreateDirectory(tempPath);//创建文件夹在根目录下 string _db = System.IO.Path.Combine(tempPath, "sddb.dll"); SQLiteHelper helper = new SQLiteHelper(_db); OperResult oper = new OperResult(); helper.ExecuteNonQuery(string.Format("drop table if exists {0}", sdtableName), _db); string msg = string.Format("create table if not exists {0} (\r\n", sdtableName); for (int i = 0; i < sddt.Columns.Count; i++) { msg += string.Format("{0} {1},\r\n", sddt.Columns[i].ColumnName, helper.TypeToSqliteType(sddt.Columns[i].DataType)); } msg = msg.Remove(msg.LastIndexOf(",\r\n"), 3); msg += ")"; oper = helper.ExecuteNonQuery(msg, _db); oper = helper.SaveDataTable(sddt, sdtableName);
以上即可完成对福彩3D数据的爬虫,还能爬取福彩3D试机号,这些数据一些就能全部爬取完了,非常的快捷简单方便。
双色球走势图如下:
上一篇文章有介绍怎么去实现双色球走势图,这里就不再过多介绍了,这一篇主要是介绍怎么爬虫双色球和福彩3D数据。
详细介绍:https://www.cnblogs.com/luoyuhao/p/13887935.html
后记
为了做好爬虫数据和走势图,爬虫技术只能为做好走势图是一个前提条件,两个步骤是相辅相成的,现在这两个技术都具备了,只是不断完善技术才能做出更强大的走势图的网站。以上只是纯技术交流和学习,欢迎大家一起留言交流,共同学习进步。