Java：将 UTF8 字符串转换为另一种编码的字节数组
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Java: convert UTF8 String to byte array in another encoding
提问by Pavel Vyazankin
I have UTF8 encoded String, but I need to post parameters to Runtime process in cp1251. How can I decode String or byte array?
我有 UTF8 编码的字符串，但我需要将参数发布到 cp1251 中的运行时进程。如何解码字符串或字节数组？
I need smth like:.bytesInCp1251 = encodeTo(stringInUtf8, "cp1251");
我需要像：。bytesInCp1251 = encodeTo(stringInUtf8, "cp1251");
Thanks to all! This is my own solution:
谢谢大家！这是我自己的解决方案：
OutputStreamWriter writer = new OutputStreamWriter(out, "cp1251");
writer.write(s);
采纳答案by Michael Borgwardt
There is no such thing as an "UTF8 encoded String"in Java. Java Strings use UTF-16 internally, but should be seen as an abstraction without a specific encoding. If you have a String, it's already decoded. If you want to encode it, use string.getBytes(encoding). If you original data is UTF-8, you have to take that into account when you convert that data from bytes to String.
Java 中没有“UTF8 编码字符串”这样的东西。Java 字符串在内部使用 UTF-16，但应将其视为没有特定编码的抽象。如果你有一个字符串，它已经被解码了。如果要对其进行编码，请使用string.getBytes(encoding). 如果原始数据是 UTF-8，则在将该数据从字节转换为字符串时必须考虑到这一点。
回答by Buhake Sindi
Why not do something like this (assuming stringInUtf8is a UTF-8 String)?
为什么不做这样的事情（假设stringInUtf8是一个 UTF-8 字符串）？
String cp1251Str = new String(stringInUtf8.getBytes("UTF-8"), "cp1251");
回答by William
byte[] bytesInCp1251 = stringInUtf8.getBytes("cp1251");
回答by Pavel Vyazankin
This is solution!
这是解决方案！
OutputStreamWriter writer = new OutputStreamWriter(out, "cp1251");
writer.write(s);
