15.2 在 Controller 中年添加对外访问接口

15.2.1 添加封装数据的 bean 类

package com.atguigu.dw.gmallpublisher.bean

import org.json4s.JValue

/**
  * 封装饼图中的数据
  * 代表一张饼图
  */
case class Stat(title: String, options: List[Opt])

/**
  * 表示结果中的一个选项
  * 男  0.1 ...
  * *
  * 20-20岁  0.2
  */
case class Opt(name: String, value: String)

/**
  * 封装返回给前端的所有数据
  */
case class SaleInfo(total: Int, stats: List[Stat], detail: List[Map[String, Any]])

15.2.2 在 Controller 中添加方法

/*
接口: http://localhost:8070/sale_detail?date=2019-05-20&&startpage=1&&size=5&&keyword=手机小米

 */
@GetMapping(Array("sale_detail"))
def saleDetail(@RequestParam("date") date: String,
               @RequestParam("startpage") startPage: Int,
               @RequestParam("size") pageSize: Int,
               @RequestParam("keyword") keyword: String) = {
    val formater = new DecimalFormat(".00")

    // 按照性别统计
    val saleDetailMapByGender: Map[String, Any] = publisherService.getSaleDetailAndAggResultByAggField(date, keyword, startPage, pageSize, "user_gender", 2)
    val total: Integer = saleDetailMapByGender("total").asInstanceOf[Integer]
    val genderMap: Map[String, Long] = saleDetailMapByGender("aggMap").asInstanceOf[Map[String, Long]]
    val maleCount: Long = genderMap("M")
    val femalCount: Long = genderMap("F")
    // 个数变比例, F M 变 男 女 用户性别占比
    val genderOpts = List[Opt](
        Opt("total", total.toString),
        Opt("男", formater.format(maleCount.toDouble / total)),
        Opt("女", formater.format(femalCount.toDouble / total))
    )
    // 性别图片的数据
    val genderStat = Stat("用户性别占比", genderOpts)

    // 按照年龄统计
    val saleDetailMapByAge: Map[String, Any] = publisherService.getSaleDetailAndAggResultByAggField(date, keyword, startPage, pageSize, "user_age", 100)
    // 分别计算每个年龄段的人数
    val ageMap: Map[String, Long] = saleDetailMapByAge("aggMap").asInstanceOf[Map[String, Long]]
    val ageOpts = ageMap.groupBy {
        case (age, _) =>
            val intAge = age.toInt
            if (intAge < 20) "20岁以下"
            else if (intAge >= 20 && intAge <= 30) "20岁到30岁"
            else "30岁以上"
    }.map {
        case (age2age, map) =>
            (age2age, (0L /: map) (_ + _._2))
    }.map {
        case (age2age, count) =>
            (age2age, formater.format(count.toDouble / total))
    }.toList.map {
        case (age2age, rate) =>
            Opt(age2age, rate)
    }

    // 年龄段图表的数据
    val ageStat = Stat("用户年龄占比", ageOpts)

    // 详表
    val detailList: List[Map[String, Any]] = saleDetailMapByAge("detail").asInstanceOf[List[Map[String, Any]]]
    val saleInfo = SaleInfo(total, List(genderStat, ageStat), detailList)
    // 返回给前端数据
    import org.json4s.jackson.Serialization.write  // 序列化方法
    implicit val formats = DefaultFormats
    write(saleInfo)
}