package com.dayu.general.net
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import android.text.TextUtils
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import com.google.gson.Gson
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import com.google.gson.GsonBuilder
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import com.google.gson.JsonParser
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import com.google.gson.LongSerializationPolicy
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import org.json.JSONArray
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import org.json.JSONException
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import org.json.JSONObject
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import java.lang.reflect.ParameterizedType
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import java.lang.reflect.Type
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import java.util.*
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/**
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* Description: JSON解析工具类
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* Author: zuo
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* Date: 2025/3/7
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*/
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class MyJsonParser {
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companion object {
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/**
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* 获取Json字符串中的属性值
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*/
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@JvmStatic
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@Throws(JSONException::class)
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fun getPropertyFromJson(json: String, attrName: String): Any? {
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return try {
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val jsonObject = JSONObject(json)
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jsonObject.get(attrName)
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} catch (e: JSONException) {
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null
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}
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}
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/**
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* 将对象转换成Json字符串
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*/
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@JvmStatic
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fun <T> bean2Json(t: T?): String {
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return try {
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if (t == null || TextUtils.isEmpty(t.toString())) return ""
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Gson().toJson(t)
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} catch (e: Exception) {
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e.printStackTrace()
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""
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}
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}
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/**
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* 转换为T类型
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*/
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@JvmStatic
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fun <T> json2Bean(json: String, tClass: Class<T>): T? {
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return try {
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if (!TextUtils.isEmpty(json)) {
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Gson().fromJson(json, tClass)
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} else null
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} catch (e: Exception) {
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e.printStackTrace()
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null
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}
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}
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/**
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* 将Json直接序列化为List
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*/
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@JvmStatic
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fun <T> json2List(json: String, type: Type): List<T>? {
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return try {
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if (!TextUtils.isEmpty(json)) {
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Gson().fromJson(json, type)
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} else null
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} catch (e: Exception) {
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e.printStackTrace()
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null
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}
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}
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private fun buildGson() = GsonBuilder().create()
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@JvmStatic
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fun <T> getBeanFromJson(json: String, cl: Class<T>): T? {
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return try {
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buildGson().fromJson(json, cl)
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} catch (e: Exception) {
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e.printStackTrace()
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null
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}
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}
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@JvmStatic
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fun <T> getBeanFromJson(json: String, cl: Type): T? {
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return try {
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buildGson().fromJson(json, cl)
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} catch (e: Exception) {
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e.printStackTrace()
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null
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}
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}
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@JvmStatic
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fun <T> getBeanFromMap(map: Map<String, Any>, cl: Class<T>): T? {
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return getBeanFromJson(getJsonFromMap(map), cl)
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}
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@JvmStatic
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fun getJsonFromMap(params: Map<String, Any>?): String {
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if (params.isNullOrEmpty()) return ""
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return getJSONObjectFromMap(params).toString()
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}
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@JvmStatic
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fun getJsontoMap(params: Map<*, *>): String {
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return GsonBuilder()
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.setLongSerializationPolicy(LongSerializationPolicy.STRING)
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.serializeSpecialFloatingPointValues()
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.create()
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.toJson(params)
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}
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@JvmStatic
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fun <T> getJsonbyList(params: List<T>): String {
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return Gson().toJson(params)
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}
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@Suppress("UNCHECKED_CAST")
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private fun getJSONObjectFromMap(params: Map<String, Any>): JSONObject {
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val jsonObject = JSONObject()
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for ((key, value) in params) {
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try {
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when (value) {
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is List<*> -> {
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if (value.isNotEmpty()) {
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val array = JSONArray()
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for (o in value) {
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when (o) {
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is Map<*, *> -> array.put(getJSONObjectFromMap(o as Map<String, Any>))
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is List<*> -> {
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val array1 = JSONArray()
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array1.put(getListFromJson(o.toString()))
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array.put(array1)
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}
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else -> array.put(o)
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}
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}
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jsonObject.put(key, array)
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}
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}
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is Map<*, *> -> jsonObject.put(key, getJSONObjectFromMap(value as Map<String, Any>))
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else -> jsonObject.put(key, value)
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}
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} catch (e: JSONException) {
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e.printStackTrace()
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}
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}
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return jsonObject
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}
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@JvmStatic
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fun getMapFromJson(jsonStr: String?): HashMap<String, Any> {
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val valueMap = LinkedHashMap<String, Any>()
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if (jsonStr.isNullOrEmpty()) return valueMap
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try {
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val jsonObject = JSONObject(jsonStr)
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return getMapFromJsonObject(jsonObject)
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} catch (e: Exception) {
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e.printStackTrace()
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}
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return valueMap
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}
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@JvmStatic
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fun getListFromJsonArray(jsonArray: JSONArray): List<Any> {
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val list = ArrayList<Any>()
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try {
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for (i in 0 until jsonArray.length()) {
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when (val obj = jsonArray.get(i)) {
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is JSONObject -> list.add(getMapFromJsonObject(obj))
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is JSONArray -> list.add(getListFromJsonArray(jsonArray))
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else -> {
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if (obj != null && !TextUtils.isEmpty(obj.toString()) && obj.toString() != "null") {
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list.add(obj)
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}
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}
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}
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}
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} catch (e: JSONException) {
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e.printStackTrace()
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}
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return list
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}
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@JvmStatic
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fun getMapFromJsonObject(jsonObj: JSONObject): HashMap<String, Any> {
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val map = LinkedHashMap<String, Any>()
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val keys = jsonObj.keys()
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try {
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while (keys.hasNext()) {
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val key = keys.next()
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when (val obj = jsonObj.get(key)) {
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is JSONArray -> map[key] = getListFromJsonArray(obj)
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is JSONObject -> map[key] = getMapFromJsonObject(obj)
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is Number -> map[key] = obj.toString()
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else -> {
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if (obj != null && !TextUtils.isEmpty(obj.toString()) && obj.toString() != "null") {
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map[key] = obj
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}
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}
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}
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}
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} catch (e: JSONException) {
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e.printStackTrace()
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}
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return map
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}
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@JvmStatic
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fun <T> getListFromJson(str: String, clazz: Class<T>): List<T>? {
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return try {
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val type = ParameterizedTypeImpl(clazz)
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Gson().fromJson<List<T>>(str, type)
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} catch (e: Exception) {
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e.printStackTrace()
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null
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}
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}
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@JvmStatic
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fun <T> getListByJson(json: String, cls: Class<T>): List<T> {
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val gson = Gson()
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val list = ArrayList<T>()
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val array = JsonParser().parse(json).asJsonArray
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array.forEach { elem ->
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list.add(gson.fromJson(elem, cls))
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}
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return list
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}
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@JvmStatic
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fun getListFromJson(str: String): List<Any>? {
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try {
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val jsonArray = JSONArray(str)
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return getListFromJsonArray(jsonArray)
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} catch (e: Exception) {
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e.printStackTrace()
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}
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return null
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}
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private class ParameterizedTypeImpl(private val clazz: Class<*>) : ParameterizedType {
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override fun getActualTypeArguments(): Array<Type> = arrayOf(clazz)
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override fun getRawType(): Type = List::class.java
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override fun getOwnerType(): Type? = null
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}
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}
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}
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