字母數字窮舉排列組合域名,位數遞增,網路爬蟲,網頁抓取
阿新 • • 發佈:2019-02-17
List<List<string>> res = Generate("abcdefghijklmnopqrstuvwxyz0123456789-");
Console.WriteLine("Count = " + res.Count);
for (int i = 0; i < res.Count; i++)
{
Console.WriteLine(res[i]);
}
public static List<List<string>> Generate(string word) { List<List<string>> result = new List<List<string>>(); List<string> dList = new List<string>(); foreach (char i in word) { dList.Add(i.ToString()); } result.Add(dList); int a = 0; do { result.Add(GetNext(word, result[a])); a++; } while (a < result.Count); return result; }
private static List<string> GetNext(string word, List<string> list) { List<string> dList = new List<string>(); int count = list.Count; for (int i = 0; i < word.Length; i++) { for (int a = 0; a < count; a++) { dList.Add(word[i].ToString() + list[a]); } } return dList; }
輸出格式:
a,b,c,……
aa,ab,ac,……
ba,bb,bc,……
ca,cb,cc,……
aaa,aab,aac,……aba,abb,abc,……aca,acb,acc,……
baa,bab,bac,……bba,bbb,bbc,……bca,bcb,bcc,……
caa,cab,cac,……cba,cbb,cbc,……cca,ccb,ccc,……
aaaa,aaab,aaac,……aaba,aabb,aabc,……aaca,aacb,aacc,……
網頁抓取、網路爬蟲效果圖: