汉字UTF编码 [英] UTF Encoding for Chinese CharactersJava

问题描述

我通过轴webservice中的一个对象接收一个String。因为我没有得到我预期的字符串，我通过将字符串转换为字节做了一个检查，我得到C3A4C2 BDC2A0 C3A5C2 A5C2BD C3A5C2 90C297在六进制，当我期待E4BDA0 E5A5BD E59097这其实是你好吗在UTF- 8。

任何想法可能会导致你好吗成为C3A4C2 BDC2A0 C3A5C2 A5C2BD C3A5C2 90C297？我做了一个Google搜索，但是我得到的是一个中文网站，描述了在python中发生的问题。任何见解会很棒，谢谢！

解决方案

你有什么是双编码。

您有正确指出的三个字符序列你好吗以UTF-8编码为E4BDA0 E5A5BD E59097。

但现在，开始编码UTF-8中THAT编码的每个字节。从E4开始。 UTF-8中的代码点是什么？尝试一下！它是C3 A4！

你得到的想法....： - ）

这是一个Java应用程序这说明了这一点：

  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（）; 
} 
  

}

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.

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!

解决方案

You have what is known as a double encoding.

You have the three character sequence "你好吗" which you correctly point out is encoded in UTF-8 as E4BDA0 E5A5BD E59097.

But now, start encoding each byte of THAT encoding in UTF-8. Start with E4. What is that codepoint in UTF-8? Try it! It's C3 A4!

You get the idea.... :-)

Here is a Java app which illustrates this:

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();
    }

}

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