Ansi,Unicode(little endian),Unicode big endian,UTF-8编码文件相互转换

Option Explicit Private Declare Function MultiByteToWideChar Lib "kernel32.dll" (ByVal CodePage As Long, ByVal dwFlags As Long, ByVal lpMultiByteStr As String, ByVal cchMultiByte As Long, ByVal lpWideCharStr As String, ByVal cchWideChar As Long) As Long Private Declare Function WideCharToMultiByte Lib "kernel32.dll" (ByVal CodePage As Long, ByVal dwFlags As Long, ByVal lpWideCharStr As Long, ByVal cchWideChar As Long, ByRef lpMultiByteStr As Any, ByVal cchMultiByte As Long, ByVal lpDefaultChar As String, ByVal lpUsedDefaultChar As Long) As Long Private Const CP_ACP As Long = 0 Private Const CP_UTF8 As Long = 65001 'Ansi纯文本文件转换为Unicode(Little Endian)文本文件 Private Function AnsiToULE(ByVal Inputansifile As String, ByVal OutputULEfile As String) As Boolean Dim Filebyte() As Byte, sAnsi As String, retLen As Long, FileNumber As Long Dim sUnicodeBuffer As String On Error Resume Next '打开Ansi纯文本文件Inputansifile FileNumber = FreeFile If Dir(Inputansifile) = "" Then AnsiToULE = False: Exit Function Open Inputansifile For Binary As #FileNumber ReDim Filebyte(LOF(FileNumber) - 1) Get #FileNumber, , Filebyte Close #FileNumber sAnsi = StrConv(Filebyte, vbUnicode) '转换为VB6可显示的字符串 retLen = MultiByteToWideChar(CP_ACP, 0, sAnsi, LenB(sAnsi), vbNullChar, 0) '取得转换后需要的空间大小retLen sUnicodeBuffer = String$(LenB(sAnsi), vbNullChar) '设置缓冲区大小 If retLen > 0 Then retLen = MultiByteToWideChar(CP_ACP, 0, sAnsi, LenB(sAnsi), sUnicodeBuffer, retLen) '开始转换 Else AnsiToULE = False: Exit Function End If '保存为Unicode(Little Endian)文本文件OutputULEfile If retLen > 0 Then FileNumber = FreeFile If Dir(OutputULEfile) <> "" Then Kill (OutputULEfile) Open OutputULEfile For Binary As #FileNumber Put #FileNumber, , &HFEFF '加上Unicode(Little Endian)文件头BOM标志FFFE Put #FileNumber, , sUnicodeBuffer '保存文件内容 Close #FileNumber AnsiToULE = True Else AnsiToULE = False: Exit Function End If End Function 'Ansi纯文本文件转换为Unicode Big Endian文本文件 Private Function AnsiToUBE(ByVal Inputansifile As String, ByVal OutputUBEfile As String) As Boolean Dim Filebyte() As Byte, Fbyte() As Byte Dim sAnsi As String, retLen As Long, FileNumber As Long Dim sUnicodeBuffer As String Dim i As Long On Error Resume Next '打开Ansi纯文本文件Inputansifile FileNumber = FreeFile If Dir(Inputansifile) = "" Then AnsiToUBE = False: Exit Function Open Inputansifile For Binary As #FileNumber ReDim Filebyte(LOF(FileNumber) - 1) Get #FileNumber, , Filebyte Close #FileNumber sAnsi = StrConv(Filebyte, vbUnicode) '转换为VB6可显示的字符串 retLen = MultiByteToWideChar(CP_ACP, 0, sAnsi, LenB(sAnsi), vbNullChar, 0) '取得转换后需要的空间大小retLen sUnicodeBuffer = String$(LenB(sAnsi), vbNullChar) '设置缓冲区大小 If retLen > 0 Then retLen = MultiByteToWideChar(CP_ACP, 0, sAnsi, LenB(sAnsi), sUnicodeBuffer, retLen) '开始转换 Else AnsiToUBE = False: Exit Function End If '保存为Unicode Big Endian文本文件OutputUBEfile If retLen > 0 Then ReDim Filebyte(LenB(sAnsi) - 1), Fbyte(LenB(sAnsi) - 1) Filebyte = StrConv(sUnicodeBuffer, vbFromUnicode) For i = 0 To UBound(Filebyte) If i Mod 2 = 0 Then Fbyte(i) = Filebyte(i + 1) Else Fbyte(i) = Filebyte(i - 1) End If Next FileNumber = FreeFile If Dir(OutputUBEfile) <> "" Then Kill (OutputUBEfile) Open OutputUBEfile For Binary As #FileNumber Put #FileNumber, , &HFFFE '加上Unicode(Big Endian)文件头BOM标志FEFF Put #FileNumber, , Fbyte ' sUnicodeBuffer '保存文件内容 Close #FileNumber AnsiToUBE = True Else AnsiToUBE = False: Exit Function End If End Function 'Ansi纯文本文件转换为UTF-8文本文件 Private Function AnsiToUTF8(ByVal Inputansifile As String, ByVal OutputUTF8file As String) As Boolean Dim Filebyte() As Byte ', Fbyte() As Byte Dim sAnsi As String, retLen As Long, FileNumber As Long Dim sUTF8Buffer() As Byte, S As String On Error Resume Next '打开Ansi纯文本文件Inputansifile FileNumber = FreeFile If Dir(Inputansifile) = "" Then AnsiToUTF8 = False: Exit Function Open Inputansifile For Binary As #FileNumber ReDim Filebyte(LOF(FileNumber) - 1) Get #FileNumber, , Filebyte Close #FileNumber S = Filebyte sAnsi = StrConv(S, vbUnicode) '转换为VB6可显示的字符串 retLen = WideCharToMultiByte(CP_UTF8, 0, StrPtr(sAnsi), -1, vbNullString, 0, vbNullString, 0) '取得转换后需要的空间大小retLen If retLen > 0 Then ReDim sUTF8Buffer(retLen - 1) ' = String$(retLen, vbNullChar) '设置缓冲区大小 retLen = WideCharToMultiByte(CP_UTF8, 0, StrPtr(sAnsi), -1, sUTF8Buffer(0), retLen, vbNullString, 0) '开始转换 Else AnsiToUTF8 = False: Exit Function End If '保存为UTF-8文本文件OutputUTF8file If retLen > 0 Then ReDim Preserve sUTF8Buffer(retLen - 1) S = StrConv(sUTF8Buffer, vbUnicode) FileNumber = FreeFile If Dir(OutputUTF8file) <> "" Then Kill (OutputUTF8file) Open OutputUTF8file For Binary As #FileNumber Put #FileNumber, , &HBFBBEF '加上UTF-8文件头BOM标志EFBBBF Put #FileNumber, 4, S '保存文件内容 Close #FileNumber AnsiToUTF8 = True Else AnsiToUTF8 = False: Exit Function End If End Function 'UTF-8文本文件转换为Unicode(Little Endian)文本文件 Private Function UTF8ToULE(ByVal InputUTF8file As String, ByVal OutputULEfile As String) As Boolean Dim Filebyte() As Byte ', Fbyte() As Byte Dim sAnsi As String, retLen As Long, FileNumber As Long Dim sUTF8Buffer As String, S As String On Error Resume Next '打开UTF-8文本文件InputUTF8file FileNumber = FreeFile If Dir(InputUTF8file) = "" Then UTF8ToULE = False: Exit Function Open InputUTF8file For Binary As #FileNumber ReDim Filebyte(LOF(FileNumber) - 1) Get #FileNumber, , Filebyte Close #FileNumber If Hex$(Filebyte(0)) = "EF" And Hex$(Filebyte(1)) = "BB" And Hex$(Filebyte(2)) = "BF" Then S = Filebyte Else MsgBox (InputUTF8file & " 为非UTF-8编码格式文件!") UTF8ToULE = False: Exit Function End If sAnsi = StrConv(S, vbUnicode) '转换为VB6可显示的字符串 retLen = MultiByteToWideChar(CP_UTF8, 0, sAnsi, -1, vbNullChar, 0) '取得转换后需要的空间大小retLen If retLen > 0 Then sUTF8Buffer = String$(retLen * 2, vbNullChar) '设置缓冲区大小 retLen = MultiByteToWideChar(CP_UTF8, 0, sAnsi, -1, sUTF8Buffer, retLen * 2) '开始转换 Else UTF8ToULE = False: Exit Function End If '保存为Unicode(Little Endian)文本文件OutputULEfile If retLen > 0 Then S = Left$(sUTF8Buffer, retLen * 2) FileNumber = FreeFile If Dir(OutputULEfile) <> "" Then Kill (OutputULEfile) Open OutputULEfile For Binary As #FileNumber Put #FileNumber, , S '保存文件内容，程序自动加上了Unicode(Little Endian)文件头BOM标志FFFE Close #FileNumber UTF8ToULE = True Else UTF8ToULE = False: Exit Function End If End Function 'UTF-8文本文件转换为Unicode(Big Endian)文本文件 Private Function UTF8ToUBE(ByVal InputUTF8file As String, ByVal OutputUBEfile As String) As Boolean Dim Filebyte() As Byte, Fbyte() As Byte Dim sAnsi As String, retLen As Long, FileNumber As Long Dim sUTF8Buffer As String, S As String Dim i As Long On Error Resume Next '打开UTF-8文本文件InputUTF8file FileNumber = FreeFile If Dir(InputUTF8file) = "" Then UTF8ToUBE = False: Exit Function Open InputUTF8file For Binary As #FileNumber ReDim Filebyte(LOF(FileNumber) - 1) Get #FileNumber, , Filebyte Close #FileNumber If Hex$(Filebyte(0)) = "EF" And Hex$(Filebyte(1)) = "BB" And Hex$(Filebyte(2)) = "BF" Then S = Filebyte Else MsgBox (InputUTF8file & " 为非UTF-8编码格式文件!") UTF8ToUBE = False: Exit Function End If sAnsi = StrConv(S, vbUnicode) '转换为VB6可显示的字符串 retLen = MultiByteToWideChar(CP_UTF8, 0, sAnsi, -1, vbNullString, 0) '取得转换后需要的空间大小retLen If retLen > 0 Then sUTF8Buffer = String$(retLen * 2, vbNullChar) '设置缓冲区大小 retLen = MultiByteToWideChar(CP_UTF8, 0, sAnsi, -1, sUTF8Buffer, retLen * 2) '开始转换 Else UTF8ToUBE = False: Exit Function End If '保存为Unicode Big Endian文本文件OutputUBEfile If retLen > 0 Then ReDim Filebyte(LenB(sAnsi) - 1), Fbyte(LenB(sAnsi) - 1) Filebyte = StrConv(Left$(sUTF8Buffer, retLen * 2), vbFromUnicode) For i = 0 To UBound(Filebyte) If i Mod 2 = 0 Then Fbyte(i) = Filebyte(i + 1) Else Fbyte(i) = Filebyte(i - 1) End If Next FileNumber = FreeFile If Dir(OutputUBEfile) <> "" Then Kill (OutputUBEfile) Open OutputUBEfile For Binary As #FileNumber Put #FileNumber, , Fbyte '保存文件内容，程序自动加上了Unicode(Big Endian)文件头BOM标志FEFF Close #FileNumber UTF8ToUBE = True Else UTF8ToUBE = False: Exit Function End If End Function 'UTF-8文本文件转换为Ansi纯文本文件 Private Function UTF8ToAnsi(ByVal InputUTF8file As String, ByVal OutputAnsifile As String) As Boolean Dim Filebyte() As Byte ', Fbyte() As Byte Dim sAnsi As String, retLen As Long, FileNumber As Long Dim sUTF8Buffer As String, S As String 'Dim i As Long On Error Resume Next '打开UTF-8文本文件InputUTF8file FileNumber = FreeFile If Dir(InputUTF8file) = "" Then UTF8ToAnsi = False: Exit Function Open InputUTF8file For Binary As #FileNumber ReDim Filebyte(LOF(FileNumber) - 1) Get #FileNumber, , Filebyte Close #FileNumber If Hex$(Filebyte(0)) = "EF" And Hex$(Filebyte(1)) = "BB" And Hex$(Filebyte(2)) = "BF" Then S = Filebyte Else MsgBox (InputUTF8file & " 为非UTF-8编码格式文件!") UTF8ToAnsi = False: Exit Function End If sAnsi = StrConv(S, vbUnicode) '转换为VB6可显示的字符串 retLen = MultiByteToWideChar(CP_UTF8, 0, sAnsi, -1, vbNullString, 0) '取得转换后需要的空间大小retLen If retLen > 0 Then sUTF8Buffer = String$(retLen * 2, vbNullChar) '设置缓冲区大小 retLen = MultiByteToWideChar(CP_UTF8, 0, sAnsi, -1, sUTF8Buffer, retLen * 2) '开始转换 Else UTF8ToAnsi = False: Exit Function End If '保存为Ansi纯文本文件OutputAnsifile If retLen > 0 Then S = Left$(sUTF8Buffer, retLen * 2) S = StrConv(S, vbFromUnicode) Mid$(S, 1, 1) = " ": S = Trim(S) FileNumber = FreeFile If Dir(OutputAnsifile) <> "" Then Kill (OutputAnsifile) Open OutputAnsifile For Binary As #FileNumber Put #FileNumber, , S '保存文件内容 Close #FileNumber UTF8ToAnsi = True Else UTF8ToAnsi = False: Exit Function End If End Function 'Unicode(Little Endian)文本文件转换为Ansi纯文本文件 Private Function ULEToAnsi(ByVal InputULEfile As String, ByVal OutputAnsifile As String) As Boolean Dim Filebyte() As Byte ', Fbyte() As Byte Dim sAnsi As String, retLen As Long, FileNumber As Long Dim sUnicodeBuffer() As Byte, S As String 'Dim i As Long On Error Resume Next '打开Unicode(Little Endian)文本文件InputULEfile FileNumber = FreeFile If Dir(InputULEfile) = "" Then ULEToAnsi = False: Exit Function Open InputULEfile For Binary As #FileNumber ReDim Filebyte(LOF(FileNumber) - 1) Get #FileNumber, , Filebyte Close #FileNumber If Hex$(Filebyte(0)) = "FF" And Hex$(Filebyte(1)) = "FE" Then S = Filebyte Else MsgBox (InputULEfile & " 为非Unicode(Little Endian)编码格式文件!") ULEToAnsi = False: Exit Function End If sAnsi = StrConv(S, vbNarrow) '转换为VB6可显示的字符串 '到这个地方，应该说可以结束了，VB6用StrConv转换，直接将sAnsi存入文件即可 '下面是用API转换为Ansi代码 sAnsi = S retLen = WideCharToMultiByte(CP_ACP, 0, StrPtr(sAnsi), -1, vbNullString, 0, vbNullString, 0) '取得转换后需要的空间大小retLen If retLen > 0 Then ReDim sUnicodeBuffer(retLen * 2 - 1) ' String$(retLen * 2, vbNullChar)'设置缓冲区大小 retLen = WideCharToMultiByte(CP_ACP, 0, StrPtr(sAnsi), -1, sUnicodeBuffer(0), retLen * 2, vbNullString, 0) '开始转换 Else ULEToAnsi = False: Exit Function End If '保存为Ansi纯文本文件OutputAnsifile If retLen > 0 Then ReDim Preserve sUnicodeBuffer(retLen - 1) S = StrConv(sUnicodeBuffer, vbUnicode) Mid$(S, 1, 1) = " ": S = Trim(S) FileNumber = FreeFile If Dir(OutputAnsifile) <> "" Then Kill (OutputAnsifile) Open OutputAnsifile For Binary As #FileNumber Put #FileNumber, , S '保存文件内容 Close #FileNumber ULEToAnsi = True Else ULEToAnsi = False: Exit Function End If End Function 'Unicode(Little Endian)文本文件转换为Unicode Big Endian文本文件。 'Unicode Big Endian文本文件转换为Unicode(Little Endian)文本文件， '只须将Hex$(Filebyte(0)) = "FF" And Hex$(Filebyte(1)) = "FE"改为 'Hex$(Filebyte(0)) = "FE" And Hex$(Filebyte(1)) = "FF"即可。 Private Function ULEToUBE(ByVal InputULEfile As String, ByVal OutputUBEfile As String) As Boolean Dim Filebyte() As Byte, Fbyte() As Byte 'Dim sAnsi As String, retLen As Long 'Dim sUnicodeBuffer() As Byte, S As String Dim i As Long, FileNumber As Long On Error Resume Next '打开Unicode(Little Endian)文本文件InputULEfile FileNumber = FreeFile If Dir(InputULEfile) = "" Then ULEToUBE = False: Exit Function Open InputULEfile For Binary As #FileNumber ReDim Filebyte(LOF(FileNumber) - 1), Fbyte(LOF(FileNumber) - 1) Get #FileNumber, , Filebyte Close #FileNumber If Hex$(Filebyte(0)) = "FF" And Hex$(Filebyte(1)) = "FE" Then 'Unicode(Little Endian)编码格式文件 Else MsgBox (InputULEfile & " 为非Unicode(Little Endian)编码格式文件!") ULEToUBE = False: Exit Function End If For i = 0 To UBound(Filebyte) If i Mod 2 = 0 Then Fbyte(i) = Filebyte(i + 1) Else Fbyte(i) = Filebyte(i - 1) End If Next '保存为Unicode Big Endian文本文件OutputUBEfile FileNumber = FreeFile If Dir(OutputUBEfile) <> "" Then Kill (OutputUBEfile) Open OutputUBEfile For Binary As #FileNumber Put #FileNumber, , Fbyte '保存文件内容 Close #FileNumber End Function 'Unicode(Little Endian)文本文件转换为UTF-8文本文件 Private Function ULEToUTF8(ByVal InputULEfile As String, ByVal OutputUTF8file As String) As Boolean Dim Filebyte() As Byte ', Fbyte() As Byte Dim sAnsi As String, retLen As Long, FileNumber As Long Dim sUTF8Buffer() As Byte, S As String On Error Resume Next '打开Unicode(Little Endian)文本文件InputULEfile FileNumber = FreeFile If Dir(InputULEfile) = "" Then ULEToUTF8 = False: Exit Function Open InputULEfile For Binary As #FileNumber ReDim Filebyte(LOF(FileNumber) - 1) Get #FileNumber, , Filebyte Close #FileNumber If Hex$(Filebyte(0)) = "FF" And Hex$(Filebyte(1)) = "FE" Then S = Filebyte Else MsgBox (InputULEfile & " 为非Unicode(Little Endian)编码格式文件!") ULEToUTF8 = False: Exit Function End If sAnsi = StrConv(S, vbNarrow) '转换为VB6可显示的字符串 Mid$(sAnsi, 1, 1) = " ": sAnsi = Trim(sAnsi) retLen = WideCharToMultiByte(CP_UTF8, 0, StrPtr(sAnsi), -1, vbNullString, 0, vbNullString, 0) '取得转换后需要的空间大小retLen If retLen > 0 Then ReDim sUTF8Buffer(retLen - 1) ' = String$(retLen, vbNullChar) '设置缓冲区大小 retLen = WideCharToMultiByte(CP_UTF8, 0, StrPtr(sAnsi), -1, sUTF8Buffer(0), retLen, vbNullString, 0) '开始转换 Else ULEToUTF8 = False: Exit Function End If '保存为UTF-8文本文件OutputUTF8file If retLen > 0 Then ReDim Preserve sUTF8Buffer(retLen - 1) S = StrConv(sUTF8Buffer, vbUnicode) FileNumber = FreeFile If Dir(OutputUTF8file) <> "" Then Kill (OutputUTF8file) Open OutputUTF8file For Binary As #FileNumber Put #FileNumber, , &HBFBBEF '加上UTF-8文件头BOM标志EFBBBF Put #FileNumber, 4, S '保存文件内容 Close #FileNumber ULEToUTF8 = True Else ULEToUTF8 = False: Exit Function End If End Function Private Sub Command1_Click() '先新建一个Ansi纯文本文件"d:/AnsiCodeFile.txt" 'Ansi纯文本文件转换为Unicode(Little Endian)文本文件 Call AnsiToULE("d:/AnsiCodeFile.txt", "d:/AnsiToUnicodeLEFile.txt") 'Ansi纯文本文件转换为Unicode(Big Endian)文本文件 Call AnsiToUBE("d:/AnsiCodeFile.txt", "d:/AnsiToUnicodeBEFile.txt") 'Ansi纯文本文件转换为UTF-8文本文件 Call AnsiToUTF8("d:/AnsiCodeFile.txt", "d:/AnsiToUTF8File.txt") 'UTF-8文本文件转换为Unicode(Little Endian)文本文件 Call UTF8ToULE("d:/AnsiToUTF8File.txt", "d:/UTF8ToUnicodeLEFile.txt") 'UTF-8文本文件转换为Unicode Big Endian文本文件 Call UTF8ToUBE("d:/AnsiToUTF8File.txt", "d:/UTF8ToUnicodeBEFile.txt") 'UTF-8文本文件转换为Ansi纯文本文件 Call UTF8ToAnsi("d:/AnsiToUTF8File.txt", "d:/UTF8ToAnsiFile.txt") 'Unicode(Little Endian)文本文件转换为Ansi纯文本文件 Call ULEToAnsi("d:/AnsiToUnicodeLEFile.txt", "d:/UnicodeLEToAnsiFile.txt") 'Unicode(Little Endian)文本文件转换为Unicode Big Endian文本文件 Call ULEToUBE("d:/AnsiToUnicodeLEFile.txt", "d:/UnicodeLEToUnicodeBEFile.txt") 'Unicode(Little Endian)文本文件转换为UTF-8文本文件 Call ULEToUTF8("d:/AnsiToUnicodeLEFile.txt", "d:/UnicodeLEToUTF8File.txt") End Sub