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StringHelper.cs
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432 lines (406 loc) · 16.5 KB
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/*
* 作用：字符串操作。
* */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Helper.Core.Library
{
#region 逻辑处理辅助枚举
public enum StringCaseTypeEnum
{
/// <summary>
/// 默认
/// </summary>
Normal = 0,
/// <summary>
/// 小写
/// </summary>
Lower = 1,
/// <summary>
/// 大写
/// </summary>
Upper = 2
}
public enum StringSeedTypeEnum
{
/// <summary>
/// 纯数字
/// </summary>
Number = 0,
/// <summary>
/// 纯字符
/// </summary>
Char = 1,
/// <summary>
/// 数字字符组合
/// </summary>
NumberChar = 2
}
#endregion
public class StringHelper
{
#region 私有属性常量
private static readonly char[] NUMBER_SEED_LIST = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
private static readonly char[] CHAR_SEED_LIST = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
private static readonly char[] NUMBER_CHAR_SEED_LIST = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
#endregion
#region 对外公开方法
/// <summary>
/// 获取随机字符串
/// </summary>
/// <param name="length">长度</param>
/// <param name="prefix">前缀</param>
/// <param name="suffix">后缀</param>
/// <param name="seedType">StringSeedTypeEnum</param>
/// <param name="caseType">StringCaseTypeEnum</param>
/// <returns></returns>
public static string GetRandomCode(int length, string prefix = "", string suffix = "", StringSeedTypeEnum seedType = StringSeedTypeEnum.Number, StringCaseTypeEnum caseType = StringCaseTypeEnum.Normal)
{
char[] seedList = null;
if (seedType == StringSeedTypeEnum.Number)
{
seedList = NUMBER_SEED_LIST;
}
else if (seedType == StringSeedTypeEnum.Char)
{
seedList = CHAR_SEED_LIST;
}
else
{
seedList = NUMBER_CHAR_SEED_LIST;
}
int seedLength = seedList.Length;
Random random = new Random();
StringBuilder stringBuilder = new StringBuilder();
if (!string.IsNullOrEmpty(prefix)) stringBuilder.Append(prefix);
for (int index = 0; index < length; index++)
{
stringBuilder.Append(seedList[random.Next(0, seedLength)]);
}
if (!string.IsNullOrEmpty(suffix)) stringBuilder.Append(suffix);
if (caseType == StringCaseTypeEnum.Lower)
{
return stringBuilder.ToString().ToLower();
}
else if (caseType == StringCaseTypeEnum.Upper)
{
return stringBuilder.ToString().ToUpper();
}
return stringBuilder.ToString();
}
/// <summary>
/// 获取字节长度
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static int GetLength(string str)
{
return System.Text.UTF8Encoding.Default.GetBytes(str).Length;
}
/// <summary>
/// 左补齐字符串
/// </summary>
/// <param name="str">字符串</param>
/// <param name="paddingStr">填充字符串</param>
/// <param name="repeat">重复次数</param>
/// <returns></returns>
public static string PadLeft(string str, string paddingStr, int repeat)
{
return StringPad(str, paddingStr, repeat, true);
}
/// <summary>
/// 右补齐字符串
/// </summary>
/// <param name="str">字符串</param>
/// <param name="paddingStr">填充字符串</param>
/// <param name="repeat">重复次数</param>
/// <returns></returns>
public static string PadRight(string str, string paddingStr, int repeat)
{
return StringPad(str, paddingStr, repeat, false);
}
/// <summary>
/// 补充前缀或者后缀
/// </summary>
/// <param name="str">字符串</param>
/// <param name="charStr">要补充的字符</param>
/// <returns></returns>
public static string PadChar(string str, string charStr = ",")
{
if (string.IsNullOrEmpty(str)) return str;
if (!str.StartsWith(charStr)) str = charStr + str;
if (!str.EndsWith(charStr)) str = str + charStr;
return str;
}
/// <summary>
/// 截取前面字符
/// </summary>
/// <param name="str">字符串</param>
/// <param name="trim">要移除的字符串</param>
/// <returns></returns>
public static string TrimStart(string str, string trim)
{
if (string.IsNullOrEmpty(str) || string.IsNullOrEmpty(trim)) return str;
return str.Substring(trim.Length);
}
/// <summary>
/// 截取后面字符
/// </summary>
/// <param name="str">字符串</param>
/// <param name="trim">要移除的字符串</param>
/// <returns></returns>
public static string TrimEnd(string str, string trim)
{
if (string.IsNullOrEmpty(str) || string.IsNullOrEmpty(trim)) return str;
return str.Substring(0, str.Length - trim.Length);
}
/// <summary>
/// 截取前后字符串
/// </summary>
/// <param name="str">字符串</param>
/// <param name="charStr">要移除的字符</param>
/// <returns></returns>
public static string TrimChar(string str, string charStr = ",")
{
if (string.IsNullOrEmpty(str)) return str;
if (str.StartsWith(str)) str = str.TrimStart(charStr.ToCharArray());
if (str.EndsWith(str)) str = str.TrimEnd(charStr.ToCharArray());
return str;
}
/// <summary>
/// 获取列表
/// </summary>
/// <typeparam name="T">简单类型，例：string</typeparam>
/// <param name="str">要拆分的字符串，例：id,name</param>
/// <param name="splitChar">分隔符，例：,</param>
/// <param name="removeRepeat">是否去除重复值</param>
/// <param name="caseEnum">StringCaseTypeEnum 枚举</param>
/// <returns></returns>
public static List<T> ToList<T>(string str, string splitChar, bool removeRepeat = false, StringCaseTypeEnum caseEnum = StringCaseTypeEnum.Normal)
{
if (caseEnum != StringCaseTypeEnum.Normal)
{
if (caseEnum == StringCaseTypeEnum.Lower)
{
str = str.ToLower();
splitChar = splitChar.ToLower();
}
else
{
str = str.ToUpper();
splitChar = splitChar.ToUpper();
}
}
List<string> stringList = str.Split(new string[] { splitChar }, StringSplitOptions.RemoveEmptyEntries).ToList<string>();
if (removeRepeat) stringList = stringList.Distinct<string>().ToList();
List<T> dataList = new List<T>();
foreach (string stringData in stringList)
{
dataList.Add((T)Convert.ChangeType(stringData.Trim(), typeof(T)));
}
return dataList;
}
/// <summary>
/// 转成键值对
/// </summary>
/// <typeparam name="T">简单类型，例：string</typeparam>
/// <typeparam name="K">简单类型，例：int</typeparam>
/// <param name="str">要拆分的字符串，例：id,name</param>
/// <param name="splitChar">分隔符，例：,</param>
/// <returns></returns>
public static StringKeyValueData<T, K> ToKeyValueData<T, K>(string str, string splitChar)
{
List<string> stringList = str.Split(new string[] { splitChar }, StringSplitOptions.RemoveEmptyEntries).ToList<string>();
if (stringList == null || stringList.Count != 2) return null;
return new StringKeyValueData<T, K>()
{
Key = (T)Convert.ChangeType(stringList[0].Trim(), typeof(T)),
Value = (K)Convert.ChangeType(stringList[1].Trim(), typeof(K))
};
}
/// <summary>
/// 转成键值对列表
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="K"></typeparam>
/// <param name="str"></param>
/// <param name="firstChar"></param>
/// <param name="secondChar"></param>
/// <param name="caseEnum"></param>
/// <returns></returns>
public static List<StringKeyValueData<T, K>> ToKeyValueList<T, K>(string str, string firstChar, string secondChar, StringCaseTypeEnum caseEnum = StringCaseTypeEnum.Normal)
{
if (caseEnum != StringCaseTypeEnum.Normal)
{
if (caseEnum == StringCaseTypeEnum.Lower)
{
str = str.ToLower();
firstChar = firstChar.ToLower();
secondChar = secondChar.ToLower();
}
else
{
str = str.ToUpper();
firstChar = firstChar.ToUpper();
secondChar = secondChar.ToLower();
}
}
List<StringKeyValueData<T, K>> resultList = new List<StringKeyValueData<T, K>>();
string[] stringList = str.Split(new string[] { firstChar }, StringSplitOptions.RemoveEmptyEntries);
foreach (string stringData in stringList)
{
resultList.Add(ToKeyValueData<T, K>(stringData, secondChar));
}
return resultList;
}
/// <summary>
/// 获取字典
/// </summary>
/// <typeparam name="T">简单类型，例：string</typeparam>
/// <typeparam name="K">简单类型，例：string</typeparam>
/// <param name="str">要拆分的字符串，例：id asc, name desc</param>
/// <param name="firstChar">第一个分隔符，例：,</param>
/// <param name="secondChar">第二个分隔符，例：|</param>
/// <returns></returns>
public static Dictionary<T, K> ToDict<T, K>(string str, string firstChar, string secondChar)
{
Dictionary<T, K> dict = new Dictionary<T, K>();
string[] stringList = str.Split(new string[] { firstChar }, StringSplitOptions.RemoveEmptyEntries);
foreach (string stringData in stringList)
{
string[] itemList = stringData.Split(new string[] { secondChar }, StringSplitOptions.RemoveEmptyEntries);
if (itemList != null && itemList.Length == 2)
{
T t = (T)Convert.ChangeType(itemList[0].Trim(), typeof(T));
if (!dict.ContainsKey(t)) dict.Add(t, (K)Convert.ChangeType(itemList[1].Trim(), typeof(K)));
}
}
return dict;
}
/// <summary>
/// 列表创建字符串
/// </summary>
/// <typeparam name="T">简单类型，例：int</typeparam>
/// <param name="dataList">列表数据</param>
/// <param name="splitChar">分隔符，例：,</param>
/// <returns></returns>
public static string ToString<T>(List<T> dataList, string splitChar)
{
if (dataList == null) return null;
string str = string.Join(splitChar, dataList);
if (!string.IsNullOrEmpty(str)) str = str.TrimEnd(splitChar.ToCharArray());
return str;
}
/// <summary>
/// 字典创建字符串
/// </summary>
/// <typeparam name="T">简单类型，例：string</typeparam>
/// <typeparam name="K">简单类型，例：int</typeparam>
/// <param name="dataDict">字典数据</param>
/// <param name="firstChar">第一个分隔符，例：,</param>
/// <param name="secondChar">第二个分隔符，例：|</param>
/// <returns></returns>
public static string ToString<T, K>(Dictionary<T, K> dataDict, string firstChar, string secondChar)
{
if (dataDict == null) return null;
StringBuilder stringBuilder = new StringBuilder();
foreach (var keyValueItem in dataDict)
{
stringBuilder.Append(keyValueItem.Key);
stringBuilder.Append(firstChar);
stringBuilder.Append(keyValueItem.Value);
stringBuilder.Append(secondChar);
}
return stringBuilder.ToString();
}
/// <summary>
/// 截取字符串
/// </summary>
/// <param name="text">字符串</param>
/// <param name="firstChar">第一个字符，如果 secondChar = null，则是 0-index，如果 secondChar = ""，则是 index-length</param>
/// <param name="secondChar">第二个字符</param>
/// <param name="firstEnd">是否从结尾查找第一个字符，默认：false</param>
/// <param name="secondEnd">是否从结尾查找第二个字符，默认：false</param>
/// <returns></returns>
public static string Substring(string str, string firstChar, string secondChar = null, bool firstEnd = false, bool secondEnd = false)
{
if (string.IsNullOrEmpty(str)) return null;
int beginIndex = 0;
if (!firstEnd)
{
beginIndex = str.IndexOf(firstChar);
}
else
{
beginIndex = str.LastIndexOf(firstChar);
}
if (secondChar == null)
{
str = str.Substring(0, beginIndex);
}
else
{
str = str.Substring(beginIndex + firstChar.Length);
}
if (string.IsNullOrEmpty(secondChar)) return str;
int endIndex = 0;
if (!secondEnd)
{
endIndex = str.IndexOf(secondChar);
}
else
{
endIndex = str.LastIndexOf(secondChar);
}
return str.Substring(0, endIndex);
}
/// <summary>
/// 过滤特殊字符
/// </summary>
/// <param name="str">字符串</param>
/// <param name="specList">特殊字符</param>
/// <returns></returns>
public static string FilterSpecChar(string str, params string[] specList)
{
if (string.IsNullOrEmpty(str)) return str;
str = System.Web.HttpUtility.UrlDecode(str);
List<string> filterList = new List<string>()
{
"*", "'", "<", ">", "=", "select", "delete", "update", "insert", "create"
};
if (specList != null && specList.Length > 0)
{
filterList.AddRange(specList);
filterList = filterList.Distinct().ToList(
4D25
);
}
foreach (string filterData in filterList)
{
str = str.Replace(filterData, "");
}
return str;
}
#endregion
#region 逻辑处理私有函数
private static string StringPad(string str, string paddingStr, int repeat, bool isLeft)
{
StringBuilder stringBuilder = new StringBuilder();
if (!isLeft) stringBuilder.Append(str);
for (int index = 0; index < repeat; index++)
{
stringBuilder.Append(paddingStr);
}
if (isLeft) stringBuilder.Append(str);
return stringBuilder.ToString();
}
#endregion
}
#region 逻辑处理辅助类
public class StringKeyValueData<T, K>
{
public T Key { get; set; }
public K Value { get; set; }
}
#endregion
}