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

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

3.Android代码

布局

<?xml version="1.0" encoding="utf-8"?>

Android原生态代码解析

public class MainActivity extends AppCompatActivity { private ListView lv_json_main; private List 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�d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 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�d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 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�d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 fqs; public BigFQ() { } public BigFQ(String clazz, List 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 getFqs() {  return fqs; } public void setFqs(List 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;}

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