java 汉字的UTF编码Java
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UTF Encoding for Chinese CharactersJava
提问by Maurice
I am receiving a String via an object from an axis webservice. Because I'm not getting the string I expected, I did a check by converting the string into bytes and I get C3A4C2 BDC2A0 C3A5C2 A5C2BD C3A5C2 90C297 in hexa, when I'm expecting E4BDA0 E5A5BD E59097 which is actually 你好吗 in UTF-8.
我正在通过轴网络服务的对象接收字符串。因为我没有得到我期望的字符串，我通过将字符串转换为字节进行了检查，我得到了 C3A4C2 BDC2A0 C3A5C2 A5C2BD C3A5C2 90C297 六进制，当我期待 E4BDA0 E5A5BD E59097 这实际上是你在 UTF- 8.
Any ideas what might be causing 你好吗 to become C3A4C2 BDC2A0 C3A5C2 A5C2BD C3A5C2 90C297? I did a Google search but all I got was a chinese website describing a problem that happens in python. Any insights will be great, thanks!
有什么想法可能导致你好吗变成 C3A4C2 BDC2A0 C3A5C2 A5C2BD C3A5C2 90C297？我进行了谷歌搜索，但我得到的只是一个描述 python 中发生的问题的中文网站。任何见解都会很棒，谢谢！
回答by Ray Toal
You have what is known as a double encoding.
您拥有所谓的双重编码。
You have the three character sequence "你好吗" which you correctly point out is encoded in UTF-8 as E4BDA0 E5A5BD E59097.
你有三个字符序列“你好吗”，你正确指出它以 UTF-8 编码为 E4BDA0 E5A5BD E59097。
But now, start encoding each byte of THAT encoding in UTF-8. Start with E4. What is thatcodepoint in UTF-8? Try it! It's C3 A4!
但是现在，开始在 UTF-8 中编码 THAT 编码的每个字节。从 E4 开始。UTF-8中的代码点是什么？试试看！是C3 A4！
You get the idea.... :-)
你明白了....:-)
Here is a Java app which illustrates this:
这是一个 Java 应用程序，它说明了这一点：
public class DoubleEncoding {
public static void main(String[] args) throws Exception {
byte[] encoding1 = "你好吗".getBytes("UTF-8");
String string1 = new String(encoding1, "ISO8859-1");
for (byte b : encoding1) {
System.out.printf("%2x ", b);
}
System.out.println();
byte[] encoding2 = string1.getBytes("UTF-8");
for (byte b : encoding2) {
System.out.printf("%2x ", b);
}
System.out.println();
}
}
}
