javascript javascript的转义字符串：json中的十六进制
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Escape string for javascript: hex in json
提问by mtkachenko
This string
这个字符串
{\x22Address\x22:\x22some address with quotes \x22}
{\x22Address\x22:\x22 带引号的地址 \x22}
is parsed by JSON.parse correctly in browser. Why? What do hex numbers mean in json string? I can't find explanation.
在浏览器中被 JSON.parse 正确解析。为什么？json字符串中的十六进制数字是什么意思？我找不到解释。
回答by Lorenz Meyer
In Javascript a backslash is an escape character. There are several escape sequences, you can find a list here.
在 Javascript 中，反斜杠是转义字符。有几个转义序列，您可以在此处找到列表。
The most important:
最重要的：
\xfollowed by two hexadecimal characters represent a character by it's ascii code\ufollowed by four hexadecimal characters represent a character by it's unicode number\t,\r,\nyou certainly know already. They are tab, carriage return and new line respectively.
\x后跟两个十六进制字符表示一个字符的 ascii 代码\u后跟四个十六进制字符表示一个字符的 unicode 数字\t,\r,\n你肯定已经知道了。它们分别是制表符、回车符和换行符。
回答by eirik
If you look up the hex value 22 in a ascii table, you can see that its the quote sign ( " ). Thats why its parsed correctly. http://www.asciitable.com/
如果您在 ascii 表中查找十六进制值 22，您可以看到它的引号 ( " )。这就是它正确解析的原因。http://www.asciitable.com/
var str= "{\x22test\x22: \x22hello\x22}";
var test = JSON.parse(str);
console.dir(test);
{ test: 'hello' }
{测试：'你好'}
