java 读取任何具有奇怪编码的文本文件？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/15511703/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Reading any text file having strange encoding?
提问by Brad
I have a text file with a strange encoding "UCS-2 Little Endian" that I want to read its contents using Java.
我有一个带有奇怪编码“UCS-2 Little Endian”的文本文件，我想使用 Java 读取其内容。
As you can see in the above screenshot the file contents appear fine in Notepad++, but when i read it using this code, just garbage is being printed in the console:
正如您在上面的屏幕截图中看到的，文件内容在 Notepad++ 中显示良好，但是当我使用此代码读取它时，控制台中只打印了垃圾：
String textFilePath = "c:\strange_file_encoding.txt"
BufferedReader reader = new BufferedReader( new InputStreamReader( new FileInputStream( filePath ), "UTF8" ) );
String line = "";
while ( ( line = reader.readLine() ) != null ) {
System.out.println( line ); // Prints garbage characters
}
The main point is that the user selects the file to read, so it can be of any encoding, and since I can't detect the file encoding I decode it using "UTF8" but as in the above example it fails to read it right.
重点是用户选择要读取的文件，因此它可以是任何编码，并且由于我无法检测到文件编码，因此我使用“UTF8”对其进行解码，但如上例所示，它无法正确读取.
Is there away to read such strange files in a right way ? Or at least can i detect if my code will fail to read it right ?
有没有办法以正确的方式阅读这些奇怪的文件？或者至少我可以检测我的代码是否无法正确读取？
回答by tempoc
You are using UTF-8 as your encoding in the InputStreamReader constructor, so it will try to interpret the bytes as UTF-8 instead of UCS-LE. Here is the documentation: Charset
您在 InputStreamReader 构造函数中使用 UTF-8 作为编码，因此它会尝试将字节解释为 UTF-8 而不是 UCS-LE。这是文档：Charset
I suppose you need to use UTF-16LE according to it.
我想你需要根据它使用UTF-16LE。
Here is more info on the supported character sets and their Java names: Supported Encodings
以下是有关支持的字符集及其 Java 名称的更多信息： 支持的编码
回答by Vivin Paliath
You're providing the wrong encoding in InputStreamReader. Have you tried using UTF-16LE instead if UTF8?
您在InputStreamReader. 如果 UTF8，您是否尝试过使用 UTF-16LE 代替？
BufferedReader reader = new BufferedReader( new InputStreamReader( new FileInputStream( filePath ), "UTF-16LE" ) );
According to Charset:
根据Charset：
UTF-16LE Sixteen-bit UCS Transformation Format, little-endian byte order
UTF-16LE 十六位 UCS 转换格式，小端字节序
回答by Dror Bereznitsky
You cannot use UTF-8 encoding for all files, especially if you do not know which file encoding to expect. Use a library which can detect the file encoding before your read the file, for example: juniversalchardetor jChardet
您不能对所有文件使用 UTF-8 编码，尤其是当您不知道要使用哪种文件编码时。使用可以在读取文件之前检测文件编码的库，例如：juniversalchardet或jChardet
For more info see Java : How to determine the correct charset encoding of a stream
有关更多信息，请参阅Java：如何确定流的正确字符集编码
