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方法一
val id = "339005200101010928"// 取出id前两位
val province = id.substring(0, 2)
/*//println(province)if (province == "42") {println("湖北")}else if (province == "11") {println("北京")}else if (province == "33") {println("浙江")}else if (province == "31") {println("上海")}else{println("未知", province)}*/
方法二
province match {case "42" => println("湖北")case "33" => println("折江")case "11" => println("北京")case "31" => println("上海")case _ => println("什么玩意，不到")
}