问题
I've found several questions with similar titles, but couldn't seem to use any to resolve my issue. I Can't seem to load my .csv file:
val source = io.Source.fromFile("C:/mon_usatotaldat.csv")
Returns:
java.nio.charset.UnmappableCharacterException: Input length = 1
So I tried:
val source = io.Source.fromFile("UTF-8", "C:/mon_usatotaldat.csv")
and got:
java.nio.charset.IllegalCharsetNameException: C:/mon_usatotaldat.csv
I guess UTF-8 wouldn't work, if the file isn't in UTF-8 format, so that makes sense, but I don't know what to do next.
I've managed to discover the encoding is windows-1252 using:
val source = io.Source.fromFile("C:/mon_usatotaldat.csv").codec.decodingReplaceWith("UTF-8")
But this didn't do what I had expected, which was convert the file to UTF-8. I have no Idea how to work with it.
Another thing I've tried was:
val source = io.Source.fromFile("windows-1252","C:/mon_usatotaldat.csv")
But that returned:
java.nio.charset.IllegalCharsetNameException: C:/mon_usatotaldat.csv
Please help. Thanks in advance.
回答1:
Try mapping your excel file to UTF-8 first and then try val source = io.Source.fromFile("UTF-8", "C:/mon_usatotaldat.csv")
To map to UTF-8 try:
(1) Open an Excel file where you have the info (.xls, .xlsx)
(2) In Excel, choose "CSV (Comma Delimited) (*.csv) as the file type and save as that type.
(3) In NOTEPAD (found under "Programs" and then Accessories in Start menu), open the saved .csv file in Notepad
(4) Then choose -> Save As..and at the bottom of the "save as" box, there is a select box labelled as "Encoding". Select UTF-8 (do NOT use ANSI or you lose all accents etc). After selecting UTF-8, then save the file to a slightly different file name from the original.
This file is in UTF-8 and retains all characters and accents and can be imported, for example, into MySQL and other database programs.
Reference: Excel to CSV with UTF8 encoding
Hope this helps!
回答2:
Set up an InputStreamReader to correctly read windows-1252. Don't bother with intermediate UTF-8.
来源：https://stackoverflow.com/questions/35141258/scala-java-nio-charset-unmappablecharacterexception-input-length-1