flutter ?json数据解析

import ‘dart:convert‘ show json;import ‘package:http/http.dart‘ as http;class personData_list { ?List<personData> list; ?personData_list.fromParams({this.list}); ?factory personData_list(jsonStr) => jsonStr == null ?????? null ?????: jsonStr is String ?????????? new personData_list.fromJson(json.decode(jsonStr)) ?????????: new personData_list.fromJson(jsonStr); ?personData_list.fromJson(jsonRes) { ???list = jsonRes == null ? null : []; ???for (var listItem in list == null ? [] : jsonRes[‘list‘]) { ?????list.add(listItem == null ? null : new personData.fromJson(listItem)); ???} ?} ?@override ?String toString() { ???return ‘{"json_list": $list}‘; ?}}//个人帖子以及其他详细信息class personData { ?int comment_count; ?int curation_rewards; ?int pending_claimed_accounts; ?int post_bandwidth; ?int post_count; ?int posting_rewards; ?int savings_withdraw_requests; ?int voting_power; ?int witnesses_voted_for; ?bool can_vote; ?String balance; //steem余额 ?String created; //创建账号时间 ?String delegated_vesting_shares; //代理出去的sp ?String json_metadata; ?String last_account_update; ?String last_owner_update; ?String last_post; ?String last_root_post; ?String last_vote_time; ?String name; //steem名 ?String received_vesting_shares; ?String recovery_account; ?String reward_sbd_balance; //奖励的sbd ?String reward_steem_balance; //奖励的STeem ?String reward_vesting_balance; //奖励的sp ?String reward_vesting_steem; ?String savings_balance; ?String savings_sbd_balance; ?String savings_sbd_seconds; ?String sbd_balance; //sbd总值 ?String vesting_balance; ?String vesting_shares; //sp总值 ?String vesting_withdraw_rate; ?votingPower voting_manabar; ?personData.fromParams( ?????{this.comment_count, ?????this.curation_rewards, ?????this.pending_claimed_accounts, ?????this.post_bandwidth, ?????this.post_count, ?????this.posting_rewards, ?????this.savings_withdraw_requests, ?????this.voting_power, ?????this.witnesses_voted_for, ?????this.can_vote, ?????this.balance, ?????this.created, ?????this.delegated_vesting_shares, ?????this.json_metadata, ?????this.last_account_update, ?????this.last_owner_update, ?????this.last_post, ?????this.last_root_post, ?????this.last_vote_time, ?????this.name, ?????this.received_vesting_shares, ?????this.recovery_account, ?????this.reward_sbd_balance, ?????this.reward_steem_balance, ?????this.reward_vesting_balance, ?????this.reward_vesting_steem, ?????this.savings_balance, ?????this.savings_sbd_balance, ?????this.savings_sbd_seconds, ?????this.sbd_balance, ?????this.vesting_balance, ?????this.vesting_shares, ?????this.vesting_withdraw_rate, ?????this.voting_manabar}); ?personData.fromJson(jsonRes) { ???comment_count = jsonRes[‘comment_count‘]; ???curation_rewards = jsonRes[‘curation_rewards‘]; ???pending_claimed_accounts = jsonRes[‘pending_claimed_accounts‘]; ???post_bandwidth = jsonRes[‘post_bandwidth‘]; ???post_count = jsonRes[‘post_count‘]; ???posting_rewards = jsonRes[‘posting_rewards‘]; ???savings_withdraw_requests = jsonRes[‘savings_withdraw_requests‘]; ???voting_power = jsonRes[‘voting_power‘]; ???witnesses_voted_for = jsonRes[‘witnesses_voted_for‘]; ???can_vote = jsonRes[‘can_vote‘]; ???balance = jsonRes[‘balance‘]; ???created = jsonRes[‘created‘]; ???delegated_vesting_shares = jsonRes[‘delegated_vesting_shares‘]; ???json_metadata = jsonRes[‘json_metadata‘]; ???last_account_update = jsonRes[‘last_account_update‘]; ???last_owner_update = jsonRes[‘last_owner_update‘]; ???last_post = jsonRes[‘last_post‘]; ???last_root_post = jsonRes[‘last_root_post‘]; ???last_vote_time = jsonRes[‘last_vote_time‘]; ???name = jsonRes[‘name‘]; ???received_vesting_shares = jsonRes[‘received_vesting_shares‘]; ???recovery_account = jsonRes[‘recovery_account‘]; ???reward_sbd_balance = jsonRes[‘reward_sbd_balance‘]; ???reward_steem_balance = jsonRes[‘reward_steem_balance‘]; ???reward_vesting_balance = jsonRes[‘reward_vesting_balance‘]; ???reward_vesting_steem = jsonRes[‘reward_vesting_steem‘]; ???savings_balance = jsonRes[‘savings_balance‘]; ???savings_sbd_balance = jsonRes[‘savings_sbd_balance‘]; ???savings_sbd_seconds = jsonRes[‘savings_sbd_seconds‘]; ???sbd_balance = jsonRes[‘sbd_balance‘]; ???vesting_balance = jsonRes[‘vesting_balance‘]; ???vesting_shares = jsonRes[‘vesting_shares‘]; ???vesting_withdraw_rate = jsonRes[‘vesting_withdraw_rate‘]; ???voting_manabar = jsonRes[‘voting_manabar‘] == null ???????? null ???????: new votingPower.fromJson(jsonRes[‘voting_manabar‘]); ?} ?@override ?String toString() { ???return ‘{"comment_count": $comment_count,"curation_rewards": $curation_rewards,"pending_claimed_accounts": $pending_claimed_accounts,"post_bandwidth": $post_bandwidth,"post_count": $post_count,"posting_rewards": $posting_rewards,"savings_withdraw_requests": $savings_withdraw_requests,"voting_power": $voting_power,"witnesses_voted_for": $witnesses_voted_for,"can_vote": $can_vote,"balance": ${balance != null ? ‘${json.encode(balance)}‘ : ‘null‘},"created": ${created != null ? ‘${json.encode(created)}‘ : ‘null‘},"delegated_vesting_shares": ${delegated_vesting_shares != null ? ‘${json.encode(delegated_vesting_shares)}‘ : ‘null‘},"json_metadata": ${json_metadata != null ? ‘${json.encode(json_metadata)}‘ : ‘null‘},"last_account_update": ${last_account_update != null ? ‘${json.encode(last_account_update)}‘ : ‘null‘},"last_owner_update": ${last_owner_update != null ? ‘${json.encode(last_owner_update)}‘ : ‘null‘},"last_post": ${last_post != null ? ‘${json.encode(last_post)}‘ : ‘null‘},"last_root_post": ${last_root_post != null ? ‘${json.encode(last_root_post)}‘ : ‘null‘},"last_vote_time": ${last_vote_time != null ? ‘${json.encode(last_vote_time)}‘ : ‘null‘},"name": ${name != null ? ‘${json.encode(name)}‘ : ‘null‘},"received_vesting_shares": ${received_vesting_shares != null ? ‘${json.encode(received_vesting_shares)}‘ : ‘null‘},"recovery_account": ${recovery_account != null ? ‘${json.encode(recovery_account)}‘ : ‘null‘},"reward_sbd_balance": ${reward_sbd_balance != null ? ‘${json.encode(reward_sbd_balance)}‘ : ‘null‘},"reward_steem_balance": ${reward_steem_balance != null ? ‘${json.encode(reward_steem_balance)}‘ : ‘null‘},"reward_vesting_balance": ${reward_vesting_balance != null ? ‘${json.encode(reward_vesting_balance)}‘ : ‘null‘},"reward_vesting_steem": ${reward_vesting_steem != null ? ‘${json.encode(reward_vesting_steem)}‘ : ‘null‘},"savings_balance": ${savings_balance != null ? ‘${json.encode(savings_balance)}‘ : ‘null‘},"savings_sbd_balance": ${savings_sbd_balance != null ? ‘${json.encode(savings_sbd_balance)}‘ : ‘null‘},"savings_sbd_seconds": ${savings_sbd_seconds != null ? ‘${json.encode(savings_sbd_seconds)}‘ : ‘null‘},"sbd_balance": ${sbd_balance != null ? ‘${json.encode(sbd_balance)}‘ : ‘null‘},"vesting_balance": ${vesting_balance != null ? ‘${json.encode(vesting_balance)}‘ : ‘null‘},"vesting_shares": ${vesting_shares != null ? ‘${json.encode(vesting_shares)}‘ : ‘null‘},"vesting_withdraw_rate": ${vesting_withdraw_rate != null ? ‘${json.encode(vesting_withdraw_rate)}‘ : ‘null‘},"voting_manabar": $voting_manabar}‘; ?}}class votingPower { ?int last_update_time; ?String current_mana; ?votingPower.fromParams({this.last_update_time, this.current_mana}); ?votingPower.fromJson(jsonRes) { ???last_update_time = jsonRes[‘last_update_time‘]; ???current_mana = jsonRes[‘current_mana‘]; ?} ?@override ?String toString() { ???return ‘{"last_update_time": $last_update_time,"current_mana": ${current_mana != null ? ‘${json.encode(current_mana)}‘ : ‘null‘}}‘; ?}}

import ‘package:flutter/material.dart‘;
import ‘package:项目名/data/data_index.dart‘;//这个就是上面那个解析json文件的位置
import ‘package:http/http.dart‘ as http;

class PersonPager extends StatefulWidget {
 ?@override
 ?State<StatefulWidget> createState() {
 ???return new PersonPagerState();
 ?}
}

class PersonPagerState extends State<PersonPager> {

proFile _profile;

void get() async { ???var userList = await fetchAndParseUsers(); ???var projson; ???userList.forEach( ?????(user) {
 ???????//这里就是将自己需要的字段取出来 ???????personName = user.name; ???????projson = user.json_metadata;//这个东西还需要解析 ?????}, ???); ???_profile = await ParseProfile(projson);//这个就是解析json_metadata的数据 ?} ?//获取个人信息 ?Future<List<personData>> fetchAndParseUsers() async { ???apiUrl = SteemApi.steemApiUrl + SteemApi.getPerson;//这个是请求的URL ???var res = await http.get(apiUrl + ‘?names[]=["$name"]‘);//这个版本的http 我很难理解 为什么get没有参数这个东西了，post请求是有的，所以我就很懒的 这样拼上去了 ???var jsonStr = res.body;//在这之前 用的是Response 发现没有body这个东西，使用它的data 又是各种报错，捶地！！！！！所以我就使用了http// ???print(res.body); ???var parsedUserList = json.decode(jsonStr); ???var userList = <personData>[]; ???parsedUserList.forEach((parsedUser) { ?????userList.add(new personData.fromJson(parsedUser)); ???}); ???return userList; ?}

//后面的json_metadata解析使用的方法 放在这后面
}

import ‘dart:convert‘ show json;class proFileList { ?proFile profile; ?proFileList.fromParams({this.profile}); ?factory proFileList(jsonStr) => jsonStr == null ?????? null ?????: jsonStr is String ?????????? new proFileList.fromJson(json.decode(jsonStr)) ?????????: new proFileList.fromJson(jsonStr); ?proFileList.fromJson(jsonRes) { ???profile = jsonRes[‘profile‘] == null ???????? null ???????: new proFile.fromJson(jsonRes[‘profile‘]); ?} ?@override ?String toString() { ???return ‘{"profile": $profile}‘; ?}}class proFile { ?String about; ?String cover_image; ?String location; ?String name; ?String profile_image; ?String website; ?proFile.fromParams( ?????{this.about, ?????this.cover_image, ?????this.location, ?????this.name, ?????this.profile_image, ?????this.website}); ?proFile.fromJson(jsonRes) { ???about = jsonRes[‘about‘]; ???cover_image = jsonRes[‘cover_image‘]; ???location = jsonRes[‘location‘]; ???name = jsonRes[‘name‘]; ???profile_image = jsonRes[‘profile_image‘]; ???website = jsonRes[‘website‘]; ?} ?@override ?String toString() { ???return ‘{"about": ${about != null ? ‘${json.encode(about)}‘ : ‘null‘},"cover_image": ${cover_image != null ? ‘${json.encode(cover_image)}‘ : ‘null‘},"location": ${location != null ? ‘${json.encode(location)}‘ : ‘null‘},"name": ${name != null ? ‘${json.encode(name)}‘ : ‘null‘},"profile_image": ${profile_image != null ? ‘${json.encode(profile_image)}‘ : ‘null‘},"website": ${website != null ? ‘${json.encode(website)}‘ : ‘null‘}}‘; ?}}

 //解析json_metadata ?Future<proFile> ParseProfile(var jsonStr) async { ???final parsedUserList = json.decode(jsonStr); ???var list = parsedUserList["profile"];//这里有两层，一开始 没带参数，后面就会是个空值 ???proFile pro = new proFile.fromJson(list); ???return pro; ?}