在Scala中处理可选的xml属性

import scala.xml.XML

object XmlAttributeExample {
  def main(args: Array[String]): Unit = {
    val xmlString =
      """
        |<root>
        |  <item id="1">Item 1</item>
        |  <item id="2">Item 2</item>
        |  <item>Item 3</item>
        |</root>
      """.stripMargin

    val xml = XML.loadString(xmlString)
    val items = xml \ "item"

    items.foreach { item =>
      val id = item.attribute("id").map(_.text.toInt).getOrElse(-1)
      println(s"Item id: $id, value: ${item.text}")
    }
  }
}