Android之解析JSON数据（android原生态，FastJson，Gson）

来源：互联网发布：实用的app软件编辑：程序博客网时间：2024/06/05 17:13

1.json网页代码<%@ page language="java" contentType="text/plain; charset=UTF-8"    pageEncoding="UTF-8"%><%@page isELIgnored="false" %>${fqs }

2.json数据网页效果图
这里写图片描述

3.Android代码
布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="获取JSON数据"        android:onClick="getJSON"/>    <ListView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/lv_json_main"></ListView></LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main_fastjson"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="获取JSON数据fastjson"        android:onClick="getFastjson"/>    <ListView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/lv_fastjson_main"></ListView></LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main_gson"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="获取JSON数据Gson"        android:onClick="getGSON"/>    <ListView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/lv_gson_main"></ListView></LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal">    <TextView        android:layout_width="0dp"        android:layout_height="wrap_content"        android:id="@+id/tv_item_listview_name"        android:layout_weight="1"/>    <TextView        android:layout_width="0dp"        android:layout_height="wrap_content"        android:id="@+id/tv_item_listview_content"        android:layout_weight="1"/>    <TextView        android:layout_width="0dp"        android:layout_height="wrap_content"        android:id="@+id/tv_item_listview_time"        android:layout_weight="1"/></LinearLayout>java代码Android原生态代码解析public class MainActivity extends AppCompatActivity {    private ListView lv_json_main;    private List<FQ> fqs = new ArrayList<>();    private MyAdapter myadapter;    private ProgressDialog progressDialog;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv_json_main = (ListView) findViewById(R.id.lv_json_main);        myadapter = new MyAdapter();        lv_json_main.setAdapter(myadapter);        progressDialog = new ProgressDialog(this);        progressDialog.setMessage("小青正在拼命加載中.....");    }    class MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return fqs.size();        }        @Override        public Object getItem(int position) {            return fqs.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            if (convertView == null) {                convertView = LayoutInflater.from(MainActivity.this).inflate(R.layout.item_list, null);                ItemTag itemTag = new ItemTag();                itemTag.tv_name = (TextView) convertView.findViewById(R.id.tv_item_listview_name);                itemTag.tv_content = (TextView) convertView.findViewById(R.id.tv_item_listview_content);                itemTag.tv_tiem = (TextView) convertView.findViewById(R.id.tv_item_listview_time);                convertView.setTag(itemTag);            }            ItemTag itemTag = (ItemTag) convertView.getTag();            itemTag.tv_name.setText(fqs.get(position).getName());            itemTag.tv_content.setText(fqs.get(position).getContent());            itemTag.tv_tiem.setText(fqs.get(position).getTime());            return convertView;        }    }    public void getJSON(View view) {        new Mytask().execute();    }    class Mytask extends AsyncTask {        //获取数据前        @Override        protected void onPreExecute() {            super.onPreExecute();            progressDialog.show();        }        @Override        protected Object doInBackground(Object[] params) {            String path = "http://192.168.43.149:8080/datajson.xhtml";            try {                URL url = new URL(path);                HttpURLConnection connection = (HttpURLConnection) url.openConnection();                connection.setRequestMethod("GET");                connection.setConnectTimeout(5000);                if (connection.getResponseCode() == 200) {                    InputStream is = connection.getInputStream();                    //读                    BufferedReader br=new BufferedReader(new InputStreamReader(is));                    StringBuffer stringBuffer = new StringBuffer();                    String str=null;                    while ((str=br.readLine())!=null){                        //拼接字符串                        stringBuffer.append(str);                    }                    //使用原生态解析JSON数据                    JSONObject jsonObject=new JSONObject(stringBuffer.toString());                    String clazz=jsonObject.getString("clazz");                    int lists=jsonObject.getInt("lists");                    JSONArray jsonArray=jsonObject.getJSONArray("fqs");                    for (int i = 0; i < jsonArray.length(); i++) {                        JSONObject object=jsonArray.getJSONObject(i);                        String name=object.getString("name");                        String content=object.getString("content");                        String time=object.getString("time");                        FQ fq=new FQ(name,content,time);                        fqs.add(fq);                    }                }            } catch (Exception e) {                e.printStackTrace();            }            return null;        }        //获取数据后更新UI        @Override        protected void onPostExecute(Object o) {            super.onPostExecute(o);            progressDialog.cancel();            myadapter.notifyDataSetChanged();        }    }}使用Fastjson解析public class MainFastjsonActivity extends AppCompatActivity {    private ListView lv_fastjson_main;    private List<FQ> fqs = new ArrayList<>();    private MyAdapter myadapter;    private ProgressDialog progressDialog;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main_fastjson);        lv_fastjson_main = (ListView) findViewById(R.id.lv_fastjson_main);        myadapter = new MyAdapter();        lv_fastjson_main.setAdapter(myadapter);        progressDialog = new ProgressDialog(this);        progressDialog.setMessage("小青正在拼命加載中.....");    }    class MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return fqs.size();        }        @Override        public Object getItem(int position) {            return fqs.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            if (convertView == null) {                convertView = LayoutInflater.from(MainFastjsonActivity.this).inflate(R.layout.item_list, null);                ItemTag itemTag = new ItemTag();                itemTag.tv_name = (TextView) convertView.findViewById(R.id.tv_item_listview_name);                itemTag.tv_content = (TextView) convertView.findViewById(R.id.tv_item_listview_content);                itemTag.tv_tiem = (TextView) convertView.findViewById(R.id.tv_item_listview_time);                convertView.setTag(itemTag);            }            ItemTag itemTag = (ItemTag) convertView.getTag();            itemTag.tv_name.setText(fqs.get(position).getName());            itemTag.tv_content.setText(fqs.get(position).getContent());            itemTag.tv_tiem.setText(fqs.get(position).getTime());            return convertView;        }    }    public void getFastjson(View view) {        new Mytask().execute();    }    class Mytask extends AsyncTask {        //获取数据前        @Override        protected void onPreExecute() {            super.onPreExecute();            progressDialog.show();        }        @Override        protected Object doInBackground(Object[] params) {            String path = "http://192.168.43.149:8080/datajson.xhtml";            try {                URL url = new URL(path);                HttpURLConnection connection = (HttpURLConnection) url.openConnection();                connection.setRequestMethod("GET");                connection.setConnectTimeout(5000);                if (connection.getResponseCode() == 200) {                    InputStream is = connection.getInputStream();                    //读                    BufferedReader br=new BufferedReader(new InputStreamReader(is));                    StringBuffer stringBuffer = new StringBuffer();                    String str=null;                    while ((str=br.readLine())!=null){                        //拼接字符串                        stringBuffer.append(str);                    }                    //使用FastJson解析JSON数据                    BigFQ bigFQ=JSON.parseObject(stringBuffer.toString(),BigFQ.class);                    String clazz=bigFQ.getClazz();                    int num=bigFQ.getLists();                    fqs.addAll(bigFQ.getFqs());                }            } catch (Exception e) {                e.printStackTrace();            }            return null;        }        //获取数据后更新UI        @Override        protected void onPostExecute(Object o) {            super.onPostExecute(o);            progressDialog.cancel();            myadapter.notifyDataSetChanged();        }    }}使用gson解析public class MainGsonActivity extends AppCompatActivity {    private ListView lv_gson_main;    private List<FQ> fqs = new ArrayList<>();    private MyAdapter myadapter;    private ProgressDialog progressDialog;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main_gson);        lv_gson_main = (ListView) findViewById(R.id.lv_gson_main);        myadapter = new MyAdapter();        lv_gson_main.setAdapter(myadapter);        progressDialog = new ProgressDialog(this);        progressDialog.setMessage("小青正在拼命加載中.....");    }    class MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return fqs.size();        }        @Override        public Object getItem(int position) {            return fqs.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            if (convertView == null) {                convertView = LayoutInflater.from(MainGsonActivity.this).inflate(R.layout.item_list, null);                ItemTag itemTag = new ItemTag();                itemTag.tv_name = (TextView) convertView.findViewById(R.id.tv_item_listview_name);                itemTag.tv_content = (TextView) convertView.findViewById(R.id.tv_item_listview_content);                itemTag.tv_tiem = (TextView) convertView.findViewById(R.id.tv_item_listview_time);                convertView.setTag(itemTag);            }            ItemTag itemTag = (ItemTag) convertView.getTag();            itemTag.tv_name.setText(fqs.get(position).getName());            itemTag.tv_content.setText(fqs.get(position).getContent());            itemTag.tv_tiem.setText(fqs.get(position).getTime());            return convertView;        }    }    public void getGSON(View view) {        new Mytask().execute();    }    class Mytask extends AsyncTask {        //获取数据前        @Override        protected void onPreExecute() {            super.onPreExecute();            progressDialog.show();        }        @Override        protected Object doInBackground(Object[] params) {            String path = "http://192.168.43.149:8080/datajson.xhtml";            try {                URL url = new URL(path);                HttpURLConnection connection = (HttpURLConnection) url.openConnection();                connection.setRequestMethod("GET");                connection.setConnectTimeout(5000);                if (connection.getResponseCode() == 200) {                    InputStream is = connection.getInputStream();                    //读                    BufferedReader br=new BufferedReader(new InputStreamReader(is));                    StringBuffer stringBuffer = new StringBuffer();                    String str=null;                    while ((str=br.readLine())!=null){                        //拼接字符串                        stringBuffer.append(str);                    }                    //使用Gson解析json数据                    Gson gson=new Gson();                    BigFQ bigFQ=gson.fromJson(stringBuffer.toString(),BigFQ.class);                    String clazz=bigFQ.getClazz();                    int num=bigFQ.getLists();                    fqs.addAll(bigFQ.getFqs());                    Log.i("哈哈","6");                }            } catch (Exception e) {                e.printStackTrace();            }            return null;        }        //获取数据后更新UI        @Override        protected void onPostExecute(Object o) {            super.onPostExecute(o);            progressDialog.cancel();            myadapter.notifyDataSetChanged();        }    }}

实体类

public class BigFQ {    private String clazz;    private int lists;    private List<FQ> fqs;    public BigFQ() {    }    public BigFQ(String clazz, List<FQ> fqs, int lists) {        this.clazz = clazz;        this.fqs = fqs;        this.lists = lists;    }    public String getClazz() {        return clazz;    }    public void setClazz(String clazz) {        this.clazz = clazz;    }    public List<FQ> getFqs() {        return fqs;    }    public void setFqs(List<FQ> fqs) {        this.fqs = fqs;    }    public int getLists() {        return lists;    }    public void setLists(int lists) {        this.lists = lists;    }}public class FQ {    private String name;    private String content;    private String time;    public FQ(){}    public FQ(String name, String time, String content) {        this.name = name;        this.time = time;        this.content = content;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getContent() {        return content;    }    public void setContent(String content) {        this.content = content;    }    public String getTime() {        return time;    }    public void setTime(String time) {        this.time = time;    }}public class ItemTag {    public TextView tv_name;    public TextView tv_content;    public TextView tv_tiem;}

添加联网权限

    <!--添加联网权限-->    <uses-permission android:name="android.permission.INTERNET" />

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