json——标准的JSON请求实现过程

来源：互联网发布：幽灵行动4优化编辑：程序博客网时间：2024/06/01 09:29

单数据{'singer':{'id':01,'name':'tom','gender':'男'}} 多个数据{"singers":[         {'id':02,'name':'tom','gender':'男'},          {'id':03,'name':'jerry,'gender':'男'}, {'id':04,'name':'jim,'gender':'男'}, {'id':05,'name':'lily,'gender':'女'}]}

  下面的类主要是解析单个数据parseJson（）和多个数据的方法parseJsonMulti（）:public class JsonActivity extends Activity { /** Called when the activity is first created. */ private TextView tvJson; private Button btnJson; private Button btnJsonMulti; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tvJson = (TextView) this.findViewById(R.id.tvJson); btnJson = (Button) this.findViewById(R.id.btnJson); btnJsonMulti = (Button) this.findViewById(R.id.btnJsonMulti); btnJson.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // url // String strUrl = "http://10.158.166.110:8080/AndroidServer/JsonServlet"; String strUrl = ServerPageUtil.getStrUrl(UrlsOfServer.JSON_SINGER); //获得返回的Json字符串 String strResult = connServerForResult(strUrl); //解析Json字符串 parseJson(strResult); } }); btnJsonMulti.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String strUrl = ServerPageUtil.getStrUrl(UrlsOfServer.JSON_SINGERS); String strResult = connServerForResult(strUrl); //获得多个Singer parseJsonMulti(strResult); } }); } private String connServerForResult(String strUrl) { // HttpGet对象 HttpGet httpRequest = new HttpGet(strUrl); String strResult = ""; try { // HttpClient对象 HttpClient httpClient = new DefaultHttpClient(); // 获得HttpResponse对象 HttpResponse httpResponse = httpClient.execute(httpRequest); if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { // 取得返回的数据 strResult = EntityUtils.toString(httpResponse.getEntity()); } } catch (ClientProtocolException e) { tvJson.setText("protocol error"); e.printStackTrace(); } catch (IOException e) { tvJson.setText("IO error"); e.printStackTrace(); } return strResult; } // 普通Json数据解析 private void parseJson(String strResult) { try { JSONObject jsonObj = new JSONObject(strResult).getJSONObject("singer"); int id = jsonObj.getInt("id"); String name = jsonObj.getString("name"); String gender = jsonObj.getString("gender"); tvJson.setText("ID号"+id + ", 姓名：" + name + ",性别：" + gender); } catch (JSONException e) { System.out.println("Json parse error"); e.printStackTrace(); } }     //解析多个数据的Jsonprivate void parseJsonMulti(String strResult) { try { JSONArray jsonObjs = new JSONObject(strResult).getJSONArray("singers"); String s = ""; for(int i = 0; i < jsonObjs.length() ; i++){ JSONObject jsonObj = ((JSONObject)jsonObjs.opt(i)) .getJSONObject("singer"); int id = jsonObj.getInt("id"); String name = jsonObj.getString("name"); String gender = jsonObj.getString("gender"); s +=  "ID号"+id + ", 姓名：" + name + ",性别：" + gender+ "\n" ; } tvJson.setText(s); } catch (JSONException e) { System.out.println("Jsons parse error !"); e.printStackTrace(); } } }

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