一、Dos、Unix、Mac文件格式（换行符）区别
- Dos格式文件：-CR/LF（\r\n）
- Unix格式文件：-LF (\n)
- Mac格式文件：-CR (\r)
二、转换方法
1.C#
1 using System; 2 using System.IO; 3 4 namespace SmartREIN.Common 5 { 6 public class TextDocumentFileTypeConvert 7 { 8 public enum FileType 9 { 10 DOS, 11 UNIX, 12 MAC 13 } 14 15 private const byte CR = 0x0D;//\r 16 private const byte LF = 0x0A;//\n 17 private static readonly byte[] DOS_LINE_ENDING = new byte[] { CR, LF }; 18 19 public static FileType DetermineFileFormat(string fileName) 20 { 21 byte[] data = File.ReadAllBytes(fileName); 22 int position = 0; 23 if (Array.IndexOf(data, LF, position) >= 0) 24 { 25 if (Array.IndexOf(data, CR, position) >= 0) 26 { 27 return FileType.DOS; 28 } 29 return FileType.UNIX; 30 31 } 32 if (Array.IndexOf(data, CR, position) >= 0) 33 { 34 return FileType.MAC; 35 } 36 return FileType.DOS; 37 } 38 39 public static void AutoFileTypeConvert(string fileName, FileType fileType) 40 { 41 FileType oldFileType = DetermineFileFormat(fileName); 42 43 if (fileType == FileType.DOS) 44 { 45 if (oldFileType == FileType.DOS) 46 return; 47 else if (oldFileType == FileType.UNIX) 48 Unix2Dos(fileName); 49 else if (oldFileType == FileType.MAC) 50 Mac2Dos(fileName); 51 } 52 else if (fileType == FileType.UNIX) 53 { 54 if (oldFileType == FileType.UNIX) 55 return; 56 else if (oldFileType == FileType.DOS) 57 Dos2Unix(fileName); 58 else if (oldFileType == FileType.MAC) 59 Mac2Unix(fileName); 60 } 61 else if (fileType == FileType.MAC) 62 { 63 if (oldFileType == FileType.MAC) 64 return; 65 else if (oldFileType == FileType.DOS) 66 Dos2Mac(fileName); 67 else if (oldFileType == FileType.UNIX) 68 Unix2Mac(fileName); 69 } 70 } 71 72 public static void Unix2Dos(string fileName) 73 { 74 byte[] data = File.ReadAllBytes(fileName); 75 using (FileStream fileStream = File.OpenWrite(fileName)) 76 { 77 BinaryWriter bw = new BinaryWriter(fileStream); 78 int position = 0; 79 int index = 0; 80 do 81 { 82 index = Array.IndexOf(data, LF, position); 83 if (index >= 0) 84 { 85 if (index > 0 && data[index - 1] == CR) 86 { 87 bw.Write(data, position, index - position + 1); 88 } 89 else 90 { 91 bw.Write(data, position, index - position); 92 bw.Write(DOS_LINE_ENDING); 93 } 94 position = index + 1; 95 } 96 } 97 while (index >= 0); 98 bw.Write(data, position, data.Length - position); 99 fileStream.SetLength(fileStream.Position); 100 } 101 } 102 103 public static void Mac2Dos(string fileName) 104 { 105 byte[] data = File.ReadAllBytes(fileName); 106 int len = data.Length - 1; 107 using (FileStream fileStream = File.OpenWrite(fileName)) 108 { 109 BinaryWriter bw = new BinaryWriter(fileStream); 110 int position = 0; 111 int index = 0; 112 do 113 { 114 index = Array.IndexOf(data, CR, position); 115 if (index >= 0) 116 { 117 if (index >= 0 && index < len && data[index + 1] == LF) 118 { 119 bw.Write(data, position, index - position + 1); 120 } 121 else 122 { 123 bw.Write(data, position, index - position); 124 bw.Write(DOS_LINE_ENDING); 125 } 126 position = index + 1; 127 } 128 } while (index >= 0); 129 bw.Write(data, position, data.Length - position); 130 fileStream.SetLength(fileStream.Position); 131 } 132 } 133 134 public static void Dos2Unix(string fileName) 135 { 136 byte[] data = File.ReadAllBytes(fileName); 137 using (FileStream fileStream = File.OpenWrite(fileName)) 138 { 139 BinaryWriter bw = new BinaryWriter(fileStream); 140 int position = 0; 141 int index = 0; 142 do 143 { 144 index = Array.IndexOf(data, CR, position); 145 if (index >= 0) 146 { 147 if (index > 0 && data[index + 1] == LF) 148 { 149 bw.Write(data, position, index - position); 150 } 151 else 152 { 153 bw.Write(data, position, index - position + 1); 154 } 155 position = index + 1; 156 } 157 } 158 while (index >= 0); 159 bw.Write(data, position, data.Length - position); 160 fileStream.SetLength(fileStream.Position); 161 } 162 } 163 164 public static void Dos2Mac(string fileName) 165 { 166 byte[] data = File.ReadAllBytes(fileName); 167 using (FileStream fileStream = File.OpenWrite(fileName)) 168 { 169 BinaryWriter bw = new BinaryWriter(fileStream); 170 int position = 0; 171 int index = 0; 172 do 173 { 174 index = Array.IndexOf(data, LF, position); 175 if (index >= 0) 176 { 177 if (index > 0 && data[index - 1] == CR) 178 { 179 bw.Write(data, position, index - position); 180 } 181 else 182 { 183 bw.Write(data, position, index - position + 1); 184 } 185 position = index + 1; 186 } 187 } 188 while (index >= 0); 189 bw.Write(data, position, data.Length - position); 190 fileStream.SetLength(fileStream.Position); 191 } 192 } 193 194 public static void Mac2Unix(string fileName) 195 { 196 byte[] data = File.ReadAllBytes(fileName); 197 int len = data.Length - 1; 198 using (FileStream fileStream = File.OpenWrite(fileName)) 199 { 200 BinaryWriter bw = new BinaryWriter(fileStream); 201 int position = 0; 202 int index = 0; 203 do 204 { 205 index = Array.IndexOf(data, CR, position); 206 if (index >= 0) 207 { 208 if (index >= 0 && index < len && data[index + 1] == LF) 209 { 210 bw.Write(data, position, index - position + 1); 211 } 212 else 213 { 214 bw.Write(data, position, index - position); 215 bw.Write(LF); 216 } 217 position = index + 1; 218 } 219 } while (index >= 0); 220 bw.Write(data, position, data.Length - position); 221 fileStream.SetLength(fileStream.Position); 222 } 223 } 224 225 public static void Unix2Mac(string fileName) 226 { 227 byte[] data = File.ReadAllBytes(fileName); 228 using (FileStream fileStream = File.OpenWrite(fileName)) 229 { 230 BinaryWriter bw = new BinaryWriter(fileStream); 231 int position = 0; 232 int index = 0; 233 do 234 { 235 index = Array.IndexOf(data, LF, position); 236 if (index >= 0) 237 { 238 if (index > 0 && data[index - 1] == CR) 239 { 240 bw.Write(data, position, index - position + 1); 241 } 242 else 243 { 244 bw.Write(data, position, index - position); 245 bw.Write(CR); 246 } 247 position = index + 1; 248 } 249 } 250 while (index >= 0); 251 bw.Write(data, position, data.Length - position); 252 fileStream.SetLength(fileStream.Position); 253 } 254 } 255 } 256 }
2.UltraEdit
File -> Conversions -> UNIX/MAC to DOS
-> DOS to UNIX
-> DOS to MAC
其它还有很多方式去转，对应的环境有对应的方法。