将UTF-8 Unicode字符串转换为ASCII Unicode转义字符串 [英] Convert UTF-8 Unicode string to ASCII Unicode escaped String

问题描述

我需要将unicode字符串转换为具有以unicode编码的非ascii字符的字符串。例如，字符串汉字Max应显示为\\\漢 \ u5B57 Max。

I need to convert unicode string to string which have non-ascii characters encoded in unicode. For example, string "漢字 Max" should be presented as "\u6F22\u5B57 Max".

我尝试过：

1. Differenct combinations of

新字符串的组合

new String(sourceString.getBytes(encoding1), encoding2)

Apache StringEscapeUtils，它也像双引号一样转义为ascii字符

Apache StringEscapeUtils which escapes also ascii chars like double-quote

StringEscapeUtils.escapeJava（source）

StringEscapeUtils.escapeJava(source)

是否有一种简单的方法来编码这样的字符串？理想情况下，只应使用Java 6 SE或Apache Commons来实现所需的结果。

Is there an easy way to encode such string? Ideally only Java 6 SE or Apache Commons should be used to achieve desired result.

推荐答案

这是一种简单的代码Jon Skeet在他的评论中记得：

This is the kind of simple code Jon Skeet had in mind in his comment:

final String in = "šđčćasdf";
final StringBuilder out = new StringBuilder();
for (int i = 0; i < in.length(); i++) {
  final char ch = in.charAt(i);
  if (ch <= 127) out.append(ch);
  else out.append("\\u").append(String.format("%04x", (int)ch));
}
System.out.println(out.toString());

正如Jon所说，代理对将表示为一对 \你逃脱。

As Jon said, surrogate pairs will be represented as a pair of \u escapes.

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