java 全角转半角 不丢失精度怎么办 全角转换器

/// 时间:2007-10-30 /// 功能:全角转换为半角 /// version: 1.0 ///  /// 
要进行全角到半角转换的字符串 /// 
要进行全角到半角转换的开始位置,不能大于end /// 
要进行全角到半角转换的结束位置,不能小于start /// 

  转换成对应半角的字符串 
 public static string ConvertSBCcaseToDBCcase(string originalStr,int start,int end) { #region "异常判断" if (start < 0 || end < 0) { throw new Exception("开始位置或结束位置不能小于零"); } if (start > end) { throw new Exception("开始位置不能大于结束位置"); } if (start >= originalStr.Length || end >= originalStr.Length) { throw new Exception("开始位置或结束位置必须小于字符串的最大长度"); } #endregion /*空字符串返回空*/ if (originalStr == "") { return ""; } StringBuilder sb = new StringBuilder(); for (int i = 0; i < originalStr.Length; i++) { if (i >= start && i <= end) { sb.Append(ConvertSBCcaseToDBCcase(originalStr[i])); } else { sb.Append(originalStr[i]); } } return sb.ToString(); } #endregion #region "全角转换为半角 public static string ConvertSBCcaseToDBCcase(string originalStr)" /// 
 /// 时间:2007-10-30 /// 功能:全角转换为半角 /// version: 1.0 ///  /// 
要进行全角到半角转换的字符串 /// 

  转换成对应半角的字符串 
 public static string ConvertSBCcaseToDBCcase(string originalStr) { return ConvertSBCcaseToDBCcase(originalStr, 0, originalStr.Length - 1); } #endregion #region "全角转换为半角 public static char ConvertSBCcaseToDBCcase(char originalChar)" /// 
 /// 时间:2007-10-30 /// 功能:将全角字符转换为半角字符 /// version:1.0 ///  /// 
要进行全角到半角转换的字符 /// 

  全角字符转换为半角后的字符 
 public static char ConvertSBCcaseToDBCcase(char originalChar) { /*空格是特殊的,其全角和半角的差值也与其他字符不同*/ if ((int)originalChar == (int)'　') { return ' '; } else { if ((int)originalChar >= MinSBCcaseToInt && (int)originalChar <= MaxSBCcaseToInt) { return (char)(originalChar - Margin); } else { return originalChar; } } } #endregion #endregion #region "半角转换为全角" #region "半角转换为全角 public static string ConvertDBCcaseToSBCcase(string originalStr, int start, int end)" /// 
 /// 时间:2007-10-30 /// 功能:半角转换为全角 /// version: 1.0 ///  /// 
要进行半角到全角转换的字符串 /// 
要进行半角到全角转换的开始位置,不能大于end /// 
要进行半角到全角转换的结束位置,不能小于start /// 

  转换成对应全角的字符串 
 public static string ConvertDBCcaseToSBCcase(string originalStr, int start, int end) { #region "异常判断" if (start < 0 || end < 0) { throw new Exception("开始位置或结束位置不能小于零"); } if (start > end) { throw new Exception("开始位置不能大于结束位置"); } if (start >= originalStr.Length || end >= originalStr.Length) { throw new Exception("开始位置或结束位置必须小于字符串的最大长度"); } #endregion /*空字符串返回空*/ if (originalStr == "") { return ""; } StringBuilder sb = new StringBuilder(); for (int i = 0; i < originalStr.Length; i++) { if (i >= start && i <= end) { sb.Append(ConvertDBCcaseToSBCcase(originalStr[i])); } else { sb.Append(originalStr[i]); } } return sb.ToString(); } #endregion #region "半角转换为全角 public static string ConvertDBCcaseToSBCcase(string originalStr)" /// 
 /// 时间:2007-10-30 /// 功能:半角转换为全角 /// version: 1.0 ///  /// 
要进行半角到全角转换的字符串 /// 

  转换成对应全角的字符串 
 public static string ConvertDBCcaseToSBCcase(string originalStr) { return ConvertDBCcaseToSBCcase(originalStr, 0, originalStr.Length - 1); } #endregion #region "半角转换为全角 public static char ConvertDBCcaseToSBCcase(char originalChar)" /// 
 /// 时间:2007-10-30 /// 功能:半角转换为全角 /// version:1.0 ///  /// 
要进行半角到全角转换的字符 /// 

  半角字符转换为全角后的字符 
 public static char ConvertDBCcaseToSBCcase(char originalChar) { /*空格是特殊的,其全角和半角的差值也与其他字符不同*/ if ((int)originalChar == (int)' ') { return '　'; } else { if ((int)originalChar >= MinDBCcaseToInt && (int)originalChar <= MaxDBCcaseToInt) { return (char)(originalChar + Margin); } else { return originalChar; } } } #endregion #endregion #region "全角半角互换" #region "全角半角互换 public static string ExchangeSBCcaseAndDBCcase(string originalStr, int start, int end)" /// 
 /// 时间:2007-10-30 /// 功能:将字符串中的全角字符转换为半角,半角字符转换为全角 /// version:1.0 ///  /// 
要进行全角半角互换的字符串 /// 
要进行全角半角互换字符串的开始位置,不能大于end /// 
要进行全角半角互换字符串的结束位置,不能小于start /// 

  全角半角互换后的字符串 
 public static string ExchangeSBCcaseAndDBCcase(string originalStr, int start, int end) { #region "异常判断" if (start < 0 || end < 0) { throw new Exception("开始位置或结束位置不能小于零"); } if (start > end) { throw new Exception("开始位置不能大于结束位置"); } if (start >= originalStr.Length || end >= originalStr.Length) { throw new Exception("开始位置或结束位置必须小于字符串的最大长度"); } #endregion /*空字符串返回空*/ if (originalStr == "") { return ""; } StringBuilder sb = new StringBuilder(); for (int i = 0; i < originalStr.Length; i++) { if (i >= start && i <= end) { sb.Append(ExchangeSBCcaseAndDBCcase(originalStr[i])); } else { sb.Append(originalStr[i]); } } return sb.ToString(); } #endregion #region "全角半角互换 public static string ExchangeSBCcaseAndDBCcase(string originalStr)" /// 
 /// 时间:2007-10-30 /// 功能:将字符串中的全角字符转换为半角,半角字符转换为全角 /// version:1.0 ///  /// 

  全角半角互换后的字符串 
 public static string ExchangeSBCcaseAndDBCcase(string originalStr) { return ExchangeSBCcaseAndDBCcase(originalStr, 0, originalStr.Length - 1); } #endregion #region "全角半角互换 public static char ExchangeSBCcaseAndDBCcase(char originalChar)" /// 
 /// 时间:2007-10-30 /// 功能:全角字符和半角字符互换 /// version:1.0 ///  /// 
要进行全角和半角互换的字符 /// 

  行全角和半角互换后的字符 
 public static char ExchangeSBCcaseAndDBCcase(char originalChar) { if (originalChar == ' ') { return '　'; } else { if (originalChar == '　') { return ' '; } else { if ((int)originalChar >= MinSBCcaseToInt && (int)originalChar <= MaxSBCcaseToInt) { return (char)(originalChar - Margin); } else { if ((int)originalChar >= MinDBCcaseToInt && (int)originalChar <= MaxDBCcaseToInt) { return (char)(originalChar + Margin); } else { return originalChar; } } } } } #endregion #endregion } }