面对同样的问题，这里是使用Kotlin扩展的解决方案

   val String.stripAccents: String
    get() = Regex("\\p{InCombiningDiacriticalMarks}+")
        .replace(
            Normalizer.normalize(this, Normalizer.Form.NFD),
            ""
        )

使用

val textWithoutAccents = "some accented string".stripAccents

System.out.println(Normalizer.normalize("àèé", Normalizer.Form.NFD).replaceAll("\\p{InCombiningDiacriticalMarks}+", ""));

为我工作。上面代码段的输出给出了“aee”，这是我想要的，但是

System.out.println(Normalizer.normalize("àèé", Normalizer.Form.NFD).replaceAll("[^\\p{ASCII}]", ""));

没有做任何替换。

@David Conrad solution is the fastest I tried using the Normalizer, but it does have a bug. It basically strips characters which are not accents, for example Chinese characters and other letters like æ, are all stripped. The characters that we want to strip are non spacing marks, characters which don't take up extra width in the final string. These zero width characters basically end up combined in some other character. If you can see them isolated as a character, for example like this `, my guess is that it's combined with the space character.

public static String flattenToAscii(String string) {
    char[] out = new char[string.length()];
    String norm = Normalizer.normalize(string, Normalizer.Form.NFD);

    int j = 0;
    for (int i = 0, n = norm.length(); i < n; ++i) {
        char c = norm.charAt(i);
        int type = Character.getType(c);

        //Log.d(TAG,""+c);
        //by Ricardo, modified the character check for accents, ref: http://stackoverflow.com/a/5697575/689223
        if (type != Character.NON_SPACING_MARK){
            out[j] = c;
            j++;
        }
    }
    //Log.d(TAG,"normalized string:"+norm+"/"+new String(out));
    return new String(out);
}

面对同样的问题，这里是使用Kotlin扩展的解决方案

   val String.stripAccents: String
    get() = Regex("\\p{InCombiningDiacriticalMarks}+")
        .replace(
            Normalizer.normalize(this, Normalizer.Form.NFD),
            ""
        )

使用

val textWithoutAccents = "some accented string".stripAccents

我认为最好的解决方案是将每个char转换为HEX，并用另一个HEX替换它。因为有两种Unicode类型:

Composite Unicode
Precomposed Unicode

例如，Composite Unicode编写的“Ồ”不同于precompose Unicode编写的“Ồ”。您可以复制我的示例字符并转换它们以查看差异。

In Composite Unicode, "Ồ" is combined from 2 char: Ô (U+00d4) and ̀ (U+0300)
In Precomposed Unicode, "Ồ" is single char (U+1ED2)

我为一些银行开发了这个功能，以便在将信息发送到核心银行(通常不支持Unicode)之前转换信息，当最终用户使用多种Unicode类型输入数据时，就会遇到这个问题。所以我认为，转换为HEX并替换它是最可靠的方法。

我推荐Junidecode。它不仅可以处理'Ł'和'Ø'，而且还可以很好地从其他字母(如汉语)转录成拉丁字母。