原生JSON解析

 1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout 3 ????android:orientation="vertical" 4 ????xmlns:android="http://schemas.android.com/apk/res/android" 5 ????xmlns:app="http://schemas.android.com/apk/res-auto" 6 ????xmlns:tools="http://schemas.android.com/tools" 7 ????android:layout_width="match_parent" 8 ????android:layout_height="match_parent" 9 ????tools:context="net.bwie.jsonobject.MainActivity">10 11 ????<Button12 ????????android:id="@+id/read_file_btn"13 ????????android:layout_width="wrap_content"14 ????????android:layout_height="wrap_content"15 ????????android:text="读取文件中的json数据"/>16 17 ????<Button18 ????????android:id="@+id/parse_btn"19 ????????android:layout_width="wrap_content"20 ????????android:layout_height="wrap_content"21 ????????android:text="解析json数据"/>22 23 ????<TextView24 ????????android:id="@+id/result_tv"25 ????????android:layout_width="wrap_content"26 ????????android:layout_height="wrap_content"27 ????????android:text="Hello World!"/>28 29 </LinearLayout>

 ?1 package net.bwie.jsonobject; ?2 ??3 import java.util.List; ?4 ??5 public class ShoppingBean { ?6 ??7 ????private String msg; ?8 ????private InfoBean info; ?9 ?10 ????public String getMsg() { 11 ????????return msg; 12 ????} 13 ?14 ????public void setMsg(String msg) { 15 ????????this.msg = msg; 16 ????} 17 ?18 ????public InfoBean getInfo() { 19 ????????return info; 20 ????} 21 ?22 ????public void setInfo(InfoBean info) { 23 ????????this.info = info; 24 ????} 25 ?26 ????@Override 27 ????public String toString() { 28 ????????return "ShoppingBean{" + 29 ????????????????"msg=‘" + msg + ‘\‘‘ + 30 ????????????????", info=" + info + 31 ????????????????‘}‘; 32 ????} 33 ?34 ????public static class InfoBean { 35 ?36 ????????private int cat_id; 37 ????????private List<GoodsBean> good; 38 ????????private boolean url; 39 ?40 ????????public int getCat_id() { 41 ????????????return cat_id; 42 ????????} 43 ?44 ????????public void setCat_id(int cat_id) { 45 ????????????this.cat_id = cat_id; 46 ????????} 47 ?48 ????????public List<GoodsBean> getGood() { 49 ????????????return good; 50 ????????} 51 ?52 ????????public void setGood(List<GoodsBean> good) { 53 ????????????this.good = good; 54 ????????} 55 ?56 ????????public boolean isUrl() { 57 ????????????return url; 58 ????????} 59 ?60 ????????public void setUrl(boolean url) { 61 ????????????this.url = url; 62 ????????} 63 ?64 ????????@Override 65 ????????public String toString() { 66 ????????????return "InfoBean{" + 67 ????????????????????"cat_id=" + cat_id + 68 ????????????????????", good=" + good + 69 ????????????????????", url=" + url + 70 ????????????????????‘}‘; 71 ????????} 72 ?73 ????????public static class GoodsBean { 74 ?75 ????????????private long add_time; 76 ????????????private String colorcode; 77 ????????????private String currency_price; 78 ????????????private String description; 79 ????????????private String goods_id; 80 ????????????private String goods_name; 81 ????????????private String thumb; 82 ?83 ????????????public long getAdd_time() { 84 ????????????????return add_time; 85 ????????????} 86 ?87 ????????????public void setAdd_time(long add_time) { 88 ????????????????this.add_time = add_time; 89 ????????????} 90 ?91 ????????????public String getColorcode() { 92 ????????????????return colorcode; 93 ????????????} 94 ?95 ????????????public void setColorcode(String colorcode) { 96 ????????????????this.colorcode = colorcode; 97 ????????????} 98 ?99 ????????????public String getCurrency_price() {100 ????????????????return currency_price;101 ????????????}102 103 ????????????public void setCurrency_price(String currency_price) {104 ????????????????this.currency_price = currency_price;105 ????????????}106 107 ????????????public String getDescription() {108 ????????????????return description;109 ????????????}110 111 ????????????public void setDescription(String description) {112 ????????????????this.description = description;113 ????????????}114 115 ????????????public String getGoods_id() {116 ????????????????return goods_id;117 ????????????}118 119 ????????????public void setGoods_id(String goods_id) {120 ????????????????this.goods_id = goods_id;121 ????????????}122 123 ????????????public String getGoods_name() {124 ????????????????return goods_name;125 ????????????}126 127 ????????????public void setGoods_name(String goods_name) {128 ????????????????this.goods_name = goods_name;129 ????????????}130 131 ????????????public String getThumb() {132 ????????????????return thumb;133 ????????????}134 135 ????????????public void setThumb(String thumb) {136 ????????????????this.thumb = thumb;137 ????????????}138 139 ????????????@Override140 ????????????public String toString() {141 ????????????????return "GoodsBean{" +142 ????????????????????????"add_time=" + add_time +143 ????????????????????????", colorcode=‘" + colorcode + ‘\‘‘ +144 ????????????????????????", currency_price=‘" + currency_price + ‘\‘‘ +145 ????????????????????????", description=‘" + description + ‘\‘‘ +146 ????????????????????????", goods_id=‘" + goods_id + ‘\‘‘ +147 ????????????????????????", goods_name=‘" + goods_name + ‘\‘‘ +148 ????????????????????????", thumb=‘" + thumb + ‘\‘‘ +149 ????????????????????????‘}‘;150 ????????????}151 ????????}152 153 ????}154 155 }

 ?1 /** ?2 ?* 1、将json文件存在外部存储中，使用IO流读取文件中的数据 ?3 ?* 2、使用JSONObject解析读取出来的数据 ?4 ?*/ ?5 public class MainActivity extends AppCompatActivity implements View.OnClickListener { ?6 ??7 ????private String mJson = ""; ?8 ??9 ????protected Button mReadFileBtn; 10 ????protected Button mParseBtn; 11 ????protected TextView mResultTv; 12 ?13 ????@Override 14 ????protected void onCreate(Bundle savedInstanceState) { 15 ????????super.onCreate(savedInstanceState); 16 ????????super.setContentView(R.layout.activity_main); 17 ????????initView(); 18 ????} 19 ?20 ????@Override 21 ????public void onClick(View view) { 22 ????????if (view.getId() == R.id.read_file_btn) { 23 ????????????readFile(); 24 ????????} else if (view.getId() == R.id.parse_btn) { 25 ????????????ShoppingBean shopping = parseJson(); 26 ????????????Log.d("1507", "" + shopping); 27 ????????} 28 ????} 29 ?30 ????// 解析JSON数据 31 ????// 遇到{}就创建JSONObject，遇到[]就创建JSONArray 32 ????private ShoppingBean parseJson() { 33 ????????ShoppingBean shopping = null; 34 ????????try { 35 ????????????JSONObject rootObject = new JSONObject(mJson); 36 ?????????shopping = new ShoppingBean(); 37 ?38 ????????????String msg = rootObject.getString("msg"); 39 ????????????shopping.setMsg(msg); 40 ?41 ????????????JSONObject infoObject = rootObject.getJSONObject("info"); 42 ????????????ShoppingBean.InfoBean info = new ShoppingBean.InfoBean(); 43 ????????????shopping.setInfo(info); 44 ?45 ????????????int catId = infoObject.getInt("cat_id"); 46 ????????????info.setCat_id(catId); 47 ?48 ????????????boolean url = infoObject.getBoolean("url"); 49 ????????????info.setUrl(url); 50 ?51 ????????????JSONArray goodsArray = infoObject.getJSONArray("goods"); 52 ????????????List<ShoppingBean.InfoBean.GoodsBean> goodsList = new ArrayList<>(); 53 ????????????info.setGood(goodsList); 54 ?55 ????????????for (int i = 0; i < goodsArray.length(); i++) { 56 ????????????????JSONObject goodsObject = goodsArray.getJSONObject(i); 57 ????????????????ShoppingBean.InfoBean.GoodsBean goods = new ShoppingBean.InfoBean.GoodsBean(); 58 ?59 ????????????????long addTime = goodsObject.getLong("add_time"); 60 ????????????????goods.setAdd_time(addTime); 61 ?62 ????????????????String colorCode = goodsObject.getString("colorcode"); 63 ????????????????goods.setColorcode(colorCode); 64 ?65 ????????????????String currencyPrice = goodsObject.getString("currency_price"); 66 ????????????????goods.setCurrency_price(currencyPrice); 67 ?68 ????????????????String description = goodsObject.getString("description"); 69 ????????????????goods.setDescription(description); 70 ?71 ????????????????String goodsName = goodsObject.getString("goods_name"); 72 ????????????????goods.setGoods_name(goodsName); 73 ?74 ????????????????String thumb = goodsObject.getString("thumb"); 75 ????????????????goods.setThumb(thumb); 76 ?77 ????????????????goodsList.add(goods); 78 ????????????} 79 ?80 ????????} catch (Exception e) { 81 ????????????e.printStackTrace(); 82 ????????} 83 ?84 ????????return shopping; 85 ?86 ????} 87 ?88 ????// 读取文件中的JSON数据 89 ????private void readFile() { 90 ????????// 根目录 91 ????????// Environment.getExternalStorageDirectory() 92 ?93 ????????// 外部存储公共路径，例如：DCIM，DOWNLOADS等系统提供的文件夹 94 // ???????Environment.getExternalStoragePublicDirectory(类型) 95 ?96 ????????// 外部存储私有路径：Android文件夹 97 // ???????context.getExternalFilesDir(null) 98 ?99 ????????// downloads文件夹路径100 ????????String filePath = Environment101 ????????????????.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)102 ????????????????.getAbsolutePath();103 ????????String fileName = "json.txt";104 105 ????????File file = new File(filePath, fileName);106 107 ????????// 文件字符输入流108 ????????// 字缓符输入冲流109 ????????BufferedReader br = null;110 ????????try {111 ????????????br = new BufferedReader(new FileReader(file));112 ????????????String line = new String();113 ????????????while ((line = br.readLine()) != null) {114 ????????????????mJson += line;115 ????????????}116 ????????????if (mJson != null) {117 ????????????????mResultTv.setText(mJson);118 ????????????}119 ????????} catch (Exception e) {120 ????????????e.printStackTrace();121 ????????} finally {122 ????????????try {123 ????????????????br.close();124 ????????????} catch (IOException e) {125 ????????????????e.printStackTrace();126 ????????????}127 ????????}128 ????}129 130 ????private void initView() {131 ????????mReadFileBtn = (Button) findViewById(R.id.read_file_btn);132 ????????mReadFileBtn.setOnClickListener(MainActivity.this);133 ????????mParseBtn = (Button) findViewById(R.id.parse_btn);134 ????????mParseBtn.setOnClickListener(MainActivity.this);135 ????????mResultTv = (TextView) findViewById(R.id.result_tv);136 ????}137 }

 ?<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>