大家好,又见面了,我是全栈君
方法的代码如下:
1 /// <summary>
2 /// 人民币大写
3 /// </summary>
4 /// <param name="input">待转换输入</param>
5 /// <param name="prefix">需要添加人民币前缀</param>
6 /// <exception cref="ArgumentException" />
7 /// <returns>转换后的结果</returns>
8 public static string ToCapital(this string input, bool prefix = false) {
9
10 #region Step1 输入有效性验证
11
12 if (!Regex.IsMatch(input, @"(?<=-|^)\d*\.?\d*$"))
13 throw new ArgumentException("错误的输入金额!");
14
15 if (Regex.IsMatch(input, @"^\d{25,}"))
16 throw new ArgumentException("输入数据太大无法转换!");
17
18 #endregion
19
20 #region Step2 格式化为中间字符串
21
22 var positionDic = new Dictionary<int, string> {
23 {0,"F"},{1,"J"},{2,"."},{3,"S"},{4,"B"},{5,"Q"},{6,"W"},{7,"SW"},{8,"BW"},{9,"QW"},
24 {10,"Y"},{11,"SY"},{12,"BY"},{13,"QY"},{14,"WY"},{15,"SWY"},{16,"BWY"},{17,"QWY"},{18,"YY"},
25 {19,"SYY"},{20,"BYY"},{21,"QYY"},{22,"WYY"},{23,"SWYY"},{24,"BWYY"},{25,"QWYY"}
26 };
27
28 input = Regex.Replace(input, @"^\.", "0.");
29
30 var integerPart = Regex.Replace(input, @"^-|\..*$", "");
31 var _matchDecimal = Regex.Match(input, @"\.\d*$", RegexOptions.None);
32 var decimalPart = Regex.Replace(_matchDecimal.Success ? Convert.ToDouble(_matchDecimal.Value).ToString("0.00") : "00", @"0\.", "");
33
34 var processStack = new Stack<string>();
35 var charsArray = (integerPart + decimalPart).Reverse<char>();
36 for (int i = 0; i < charsArray.Count(); i++) {
37 processStack.Push(string.Format("{0}{1}", charsArray.ElementAt(i), positionDic[i]));
38 }
39
40 //符号处理 keleyi.com
41 if (Regex.IsMatch(input, "^-", RegexOptions.None)) {
42 processStack.Push("-");
43 }
44 if (prefix) {
45 processStack.Push("¥");
46 }
47
48 var process = string.Empty;
49 while (processStack.Count > 0) {
50 process += processStack.Pop();
51 }
52 //语义处理模式队列
53 Queue<Tuple<string, string, MatchEvaluator>> patterns = new Queue<Tuple<string, string, MatchEvaluator>>();
54 var patternBuilder = new StringBuilder();
55 for (int i = 3; i < positionDic.Count; i++) {
56 patternBuilder.AppendFormat("{0}{1}", (i == 3 ? "(0(?:" : "") + positionDic[i], i == positionDic.Count - 1 ? ")+?)+" : "|");
57 }
58 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>(patternBuilder.ToString(), "0", null));
59 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>(@"(?:\d+(?:QW|BW|SW|W|Q|B|S)?\d?YY)+", null, m => m.Value.Replace("YY", "") + "YY"));
60 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>(@"(?:\d+(?:QW|BW|SW|W|Q|B|S)?\d?Y)+", null, m => m.Value.Replace("Y", "") + "Y"));
61 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>(@"(?:\d+(?:Q|B|S)?\d?W)+", null, m => m.Value.Replace("W", "") + "W"));
62 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>(@"(?!^)0+\.", ".", null));
63 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>(@"^0\.0J|^0\.", "", null));
64 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>("0J|0F", "0", null));
65 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>("J0?$", "JZ", null));
66 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>(@"\.$|\.0+$", ".Z", null));
67 patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>(@"^0+$|^[^.]{0}$", "0.Z", null));
68
69 while (patterns.Count > 0) {
70 var pattern = patterns.Dequeue();
71 if (pattern.Item3 != null) {
72 process = Regex.Replace(process, pattern.Item1, pattern.Item3);
73 }
74 else {
75 process = Regex.Replace(process, pattern.Item1, pattern.Item2);
76 }
77 }
78
79 #endregion
80
81 #region Step3 翻译中间字符串
82 StringBuilder result = new StringBuilder();
83 var translatorDic = new Dictionary<char, string> {
84 {'0',"零"},{'1',"壹"},{'2',"贰"},{'3',"叁"},{'4',"肆"},{'5',"伍"},{'6',"陆"},{'7',"柒"},{'8',"捌"},{'9',"玖"},
85 {'S',"拾"},{'B',"佰"},{'Q',"仟"},{'W',"萬"},{'Y',"亿"},
86 {'¥',"人民币"},{'-',"负"},{'.',"圆"},{'J',"角"},{'F',"分"},{'Z',"整"}
87 };
88 for (int i = 0; i < process.Length; i++) {
89 result.Append(translatorDic[process[i]]);
90 }
91 #endregion
92
93 return result.ToString();
94 }
http://www.cnblogs.com/roucheng/
一个人民币大写的扩展方法。感觉还是有点复杂,请朋友们帮忙优化下或是给个思路。
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