Android Json解析Kotlin

{ "people": [

{ "firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa" },

{ "firstName": "Jason", "lastName":"Hunter", "email": "bbbb"},

{ "firstName": "Elliotte", "lastName":"Harold", "email": "cccc" }

]}

package Util

import com.example.jason_jan.guangdamiao.bean.Person

import org.json.JSONArray
import org.json.JSONException
import org.json.JSONObject

import java.util.ArrayList
import java.util.HashMap

/**
 * Created by Jason_Jan on 2017/7/5.
 */

class JsonUtil {
    companion object {

        /**
         * 获取对象数据
         * @param key
         * *
         * @param jsonString
         * *
         * @return
         */
        fun getPerson(key: String, jsonString: String): Person {
            val person = Person()
            try {
                val jsonObject = JSONObject(jsonString)
                val personObject = jsonObject.getJSONObject(key)

                person.UserID = personObject.getString("UserID")//这里看情况修改

            } catch (e: JSONException) {
                e.printStackTrace()
            }

            return person
        }

        /**
         * 获取对象数组数据
         * @param key
         * *
         * @param jsonString
         * *
         * @return
         */

        fun getPersons(key: String, jsonString: String): List<Person> {
            val list = ArrayList<Person>()
            try {
                val jsonObject = JSONObject(jsonString)
                //返回json的数组
                val jsonArray = jsonObject.getJSONArray(key)
                for (i in 0..jsonArray.length() - 1) {
                    val jsonObject2 = jsonArray.getJSONObject(i)
                    val person = Person()//这里看情况修改
                    list.add(person)
                }
            } catch (e: JSONException) {
                e.printStackTrace()
            }

            return list
        }

        /**
         * 获取String数组数据
         * @param key
         * *
         * @param jsonString
         * *
         * @return
         */
        fun getList(key: String, jsonString: String): List<String> {
            val list = ArrayList<String>()
            try {
                val jsonObject = JSONObject(jsonString)
                val jsonArray = jsonObject.getJSONArray(key)
                for (i in 0..jsonArray.length() - 1) {
                    val msg = jsonArray.getString(i)
                    list.add(msg)
                }
            } catch (e: JSONException) {
                e.printStackTrace()
            }

            return list
        }

        /**
         * 获取对象的Map集合数据
         * @param key
         * *
         * @param jsonString
         * *
         * @return
         */
        fun getListMap(key: String, jsonString: String): List<Map<String, Any>> {
            val list = ArrayList<Map<String, Any>>()
            try {
                val jsonObject = JSONObject(jsonString)
                val jsonArray = jsonObject.getJSONArray(key)
                for (i in 0..jsonArray.length() - 1) {
                    val jsonObject2 = jsonArray.getJSONObject(i)
                    val map = HashMap<String, Any>()
                    val iterator = jsonObject2.keys()
                    while (iterator.hasNext()) {
                        val json_key = iterator.next()
                        var json_value: Any? = jsonObject2.get(json_key)
                        if (json_value == null) {
                            json_value = ""
                        }
                        map.put(json_key, json_value)
                    }
                    list.add(map)
                }
            } catch (e: JSONException) {

                e.printStackTrace()
            }

            return list
        }
    }

}