小编Ant*_*and的帖子

以下代码成功,但是有更好的方法做同样的事情吗？也许是案例类特有的东西？在下面的代码中,对于我的简单案例类中String类型的每个字段,代码遍历我的案例类的实例列表,并查找该字段的最长字符串的长度.

case class CrmContractorRow(
                             id: Long,
                             bankCharges: String,
                             overTime: String,
                             name$id: Long,
                             mgmtFee: String,
                             contractDetails$id: Long,
                             email: String,
                             copyOfVisa: String)

object Go {
  def main(args: Array[String]) {
    val a = CrmContractorRow(1,"1","1",4444,"1",1,"1","1")
    val b = CrmContractorRow(22,"22","22",22,"55555",22,"nine long","22")
    val c = CrmContractorRow(333,"333","333",333,"333",333,"333","333")
    val rows = List(a,b,c)

    c.getClass.getDeclaredFields.filter(p => p.getType == classOf[String]).foreach{f =>
      f.setAccessible(true)
      println(f.getName + ": " + rows.map(row => f.get(row).asInstanceOf[String]).maxBy(_.length))
    }
  }
}

结果:

bankCharges: 3
overTime: 3
mgmtFee: 5
email: 9
copyOfVisa: 3