产生适合作为Javascript标识符的易读编码的文本编码?

这对方法依赖于番石榴 PercentEscaper 似乎符合我的要求。番石榴 doesn't provide an unescaper

private static PercentEscaper escaper = new PercentEscaper('',false)

static String getIdentifier(String str) {
    //minimal safe characters, but leaves letters alone, so it's somewhat legible
    String escaped = escaper.escape(str);

    //javascript identifiers can't start with a digit, and the escaper doesn't know the first
    //character has different rules. so prepend a "%3" to encode the digit
    if(Character.isDigit(escaped.charAt(0))){
        escaped = "%3"+escaped
    }

    //a percent isn't a valid in a javascript identifier, so we'll use _ as our special character
    escaped = escaped.replace('%','_');

    return escaped;
}

static String invertIdentifier(String str){
    String unescaped = str.replace('_','%');
    unescaped = URLDecoder.decode(unescaped, "UTF-8");
    return unescaped;
}