问题描述
有问题的文件不在我的控制之下。大多数字节序列是有效的UTF-8，它不是ISO-8859-1（或其他编码）。
我想尽最大努力提取尽可能多的信息。
The file in question is not under my control. Most byte sequences are valid UTF-8, it is not ISO-8859-1 (or an other encoding).I want to do my best do extract as much information as possible.
该文件包含一些非法字节序列，那些应该替换为替换字符
The file contains a few illegal byte sequences, those should be replaces with the replacement character.
这不是一件容易的事情，它认为需要一些有关UTF-8状态机的知识。
It's not an easy task, it think it requires some knowledge about the UTF-8 state machine.
Oracle有一个可以满足我需要的包装器：
Oracle has a wrapper which does what I need:
UTF8ValidationFilter javadoc
有没有类似的东西（商业或免费软件）？
Is there something like that available (commercially or as free software)?
感谢
-stephan
Thanks
-stephan
解决方案：
final BufferedInputStream in = new BufferedInputStream(istream);
final CharsetDecoder charsetDecoder = StandardCharsets.UTF_8.newDecoder();
charsetDecoder.onMalformedInput(CodingErrorAction.REPLACE);
charsetDecoder.onUnmappableCharacter(CodingErrorAction.REPLACE);
final Reader inputReader = new InputStreamReader(in, charsetDecoder);
推荐答案
做你所需要的。此类为不同类型的错误提供了字符集解码与用户定义的操作（请参阅和）。
java.nio.charset.CharsetDecoder does what you need. This class provides charset decoding with user-definable actions on different kinds of errors (see onMalformedInput() and onUnmappableCharacter()).
CharsetDecoder 写入 OutputStream ，您可以使用，有效创建过滤的 InputStream 。
CharsetDecoder writes to an OutputStream, which you can pipe into an InputStream using java.io.PipedOutputStream, effectively creating a filtered InputStream.
这篇关于如何检测非法的UTF-8字节序列来替代它们在java输入流？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！