Kotlin :如何将包含HTML数字的字符串转换为不包含HTML数字的字符串

import java.util.regex.Pattern

fun main() {
    val htmlString = "<p>This is a string with HTML numbers &#123;456&#125;</p>"
    val regex = Pattern.compile("&#(\\d+);")
    val matcher = regex.matcher(htmlString)
    val result = StringBuffer()
    
    while (matcher.find()) {
        val htmlNumber = matcher.group(1)
        val decimalNumber = htmlNumber.toInt()
        val replacement = decimalNumber.toChar().toString()
        matcher.appendReplacement(result, replacement)
    }
    
    matcher.appendTail(result)
    
    val convertedString = result.toString()
    println(convertedString)
}