更改获取文件编码的方式

Author: stulzq

CnBlogPublishTool/Program.cs

@@ -139,7 +139,7 @@ static void ProcessFile(string[] args)
 
                     string newFileName = _filePath.Substring(0, _filePath.LastIndexOf('.')) + "-cnblog" +
                                          new FileInfo(_filePath).Extension;
-                    File.WriteAllText(newFileName, _fileContent, TxtFileEncoder.GetEncoding(_filePath));
+                    File.WriteAllText(newFileName, _fileContent, EncodingType.GetType(_filePath));
 
                     Console.WriteLine($"处理完成！文件保存在：{newFileName}");
                 }

CnBlogPublishTool/Util/EncodingType.cs

@@ -0,0 +1,118 @@
+// #region File Annotation
+// 
+// Author：Zhiqiang Li
+// 
+// FileName：FileEncoding.cs
+// 
+// Project：CnBlogPublishTool
+// 
+// CreateDate：2018/05/20
+// 
+// Note: The reference to this document code must not delete this note, and indicate the source!
+// 
+// #endregion
+
+using System;
+using System.IO;
+using System.Text;
+
+namespace CnBlogPublishTool.Util
+{
+    /// <summary> 
+    /// 获取文件的编码格式 
+    /// </summary> 
+    public class EncodingType
+    {
+        /// <summary> 
+        /// 给定文件的路径，读取文件的二进制数据，判断文件的编码类型 
+        /// </summary> 
+        /// <param name=“FILE_NAME“>文件路径</param> 
+        /// <returns>文件的编码类型</returns> 
+        public static System.Text.Encoding GetType(string FILE_NAME)
+        {
+            FileStream fs = new FileStream(FILE_NAME, FileMode.Open, FileAccess.Read);
+            Encoding r = GetType(fs);
+            fs.Close();
+            return r;
+        }
+
+        /// <summary> 
+        /// 通过给定的文件流，判断文件的编码类型 
+        /// </summary> 
+        /// <param name=“fs“>文件流</param> 
+        /// <returns>文件的编码类型</returns> 
+        public static System.Text.Encoding GetType(FileStream fs)
+        {
+            byte[] Unicode = new byte[] { 0xFF, 0xFE, 0x41 };
+            byte[] UnicodeBIG = new byte[] { 0xFE, 0xFF, 0x00 };
+            byte[] UTF8 = new byte[] { 0xEF, 0xBB, 0xBF }; //带BOM 
+            Encoding reVal = Encoding.Default;
+
+            BinaryReader r = new BinaryReader(fs, System.Text.Encoding.Default);
+            int i;
+            int.TryParse(fs.Length.ToString(), out i);
+            byte[] ss = r.ReadBytes(i);
+            if (IsUTF8Bytes(ss) || (ss[0] == 0xEF && ss[1] == 0xBB && ss[2] == 0xBF))
+            {
+                reVal = Encoding.UTF8;
+            }
+            else if (ss[0] == 0xFE && ss[1] == 0xFF && ss[2] == 0x00)
+            {
+                reVal = Encoding.BigEndianUnicode;
+            }
+            else if (ss[0] == 0xFF && ss[1] == 0xFE && ss[2] == 0x41)
+            {
+                reVal = Encoding.Unicode;
+            }
+            r.Close();
+            return reVal;
+
+        }
+
+        /// <summary> 
+        /// 判断是否是不带 BOM 的 UTF8 格式 
+        /// </summary> 
+        /// <param name=“data“></param> 
+        /// <returns></returns> 
+        private static bool IsUTF8Bytes(byte[] data)
+        {
+            int charByteCounter = 1; //计算当前正分析的字符应还有的字节数 
+            byte curByte; //当前分析的字节. 
+            for (int i = 0; i < data.Length; i++)
+            {
+                curByte = data[i];
+                if (charByteCounter == 1)
+                {
+                    if (curByte >= 0x80)
+                    {
+                        //判断当前 
+                        while (((curByte <<= 1) & 0x80) != 0)
+                        {
+                            charByteCounter++;
+                        }
+                        //标记位首位若为非0 则至少以2个1开始 如:110XXXXX...........1111110X 
+                        if (charByteCounter == 1 || charByteCounter > 6)
+                        {
+                            return false;
+                        }
+                    }
+                }
+                else
+                {
+                    //若是UTF-8 此时第一位必须为1 
+                    if ((curByte & 0xC0) != 0x80)
+                    {
+                        return false;
+                    }
+                    charByteCounter--;
+                }
+            }
+            if (charByteCounter > 1)
+            {
+                throw new Exception("非预期的byte格式");
+            }
+            return true;
+        }
+
+    }
+}