问题描述
我在Google App Engine中撰写网路应用程式。它允许人们在blobstore中基本编辑html代码，并存储为 .html 文件。
I'm writing a web application in Google app Engine. It allows people to basically edit html code that gets stored as an .html file in the blobstore.
m使用fetchData返回文件中所有字符的 byte [] 。我试图打印到一个html为了让用户编辑html代码。一切都很棒！
I'm using fetchData to return a byte[] of all the characters in the file. I'm trying to print to an html in order for the user to edit the html code. Everything works great!
这是我现在唯一的问题：
Here's my only problem now:
字节数组在转换时有一些问题到字符串。智能报价和几个字符出来看起来很时髦。 （？或日本符号等）具体来说，我看到有几个字节有负值导致的问题。
The byte array is having some issues when converting back to a string. Smart quotes and a couple of characters are coming out looking funky. (?'s or japanese symbols etc.) Specifically it's several bytes I'm seeing that have negative values which are causing the problem.
智能引号回来 -108 和 -109 。为什么是这样的，如何解码负字节以显示正确的字符编码？
The smart quotes are coming back as -108 and -109 in the byte array. Why is this and how can I decode the negative bytes to show the correct character encoding?
推荐答案
特殊编码（你应该知道）。将其转换为字符串的方法是：
The byte array contains characters in a special encoding (that you should know). The way to convert it to a String is:
String decoded = new String(bytes, "UTF-8"); // example for one encoding type
By The Way - 原始字节可能显示为负小数因为java数据类型 byte 已签名，它覆盖了从-128到127的范围。
By The Way - the raw bytes appear may appear as negative decimals just because the java datatype byte is signed, it covers the range from -128 to 127.
-109 = 0x93: Control Code "Set Transmit State"
值（-109）是UNICODE中的不可打印控制字符。因此，在Windows-1252中，UTF-8不是该字符流的正确编码。
The value (-109) is a non-printable control character in UNICODE. So UTF-8 is not the correct encoding for that character stream.
0x93 您要查找的智能引用，所以该编码的Java名称是Cp1252。下一行提供了一个测试代码：
0x93 in "Windows-1252" is the "smart quote" that you're looking for, so the Java name of that encoding is "Cp1252". The next line provides a test code:
System.out.println(new String(new byte[]{-109}, "Cp1252"));
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