http请求返回并解析json数据

/*   注意get和post请求的发送区别 * 1、创建HttpGet(或HttpPost)对象，将要请求的URL通过构造方法传入HttpGet(或HttpPost)对象中；   2、使用DefaultHttpClient类的execute方法发送HTTP GET或HTTP POST 请求，并返回HttpResponse对象；   3、通过HttpResponse接口的getEntity方法返回响应信息。 * */public class TestHttpActivity extends Activity {  private Button btn_get;  private Button btn_post;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        btn_get=(Button)findViewById(R.id.btn_get);        btn_post=(Button)findViewById(R.id.btn_post);        btn_get.setOnClickListener(listener);        btn_post.setOnClickListener(listener);    }    private OnClickListener listener=new OnClickListener() {@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.btn_post:Log.i("TestHttpActivity", "ok"); DefaultHttpClient client = new DefaultHttpClient();  /**NameValuePair是传送给服务器的请求参数    param.get("name") **/                 List<NameValuePair> list = new ArrayList<NameValuePair>();                   NameValuePair pair1 = new BasicNameValuePair("name", "name0001");                   NameValuePair pair2 = new BasicNameValuePair("age", "age0001");                   list.add(pair1);                   list.add(pair2);                   UrlEncodedFormEntity entity=null;try {/**设置编码 **/entity = new UrlEncodedFormEntity(list,"UTF-8");} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();}  /**新建一个post请求**/                 HttpPost post = new HttpPost("http://aaron-pc.wsd.com/Test/testHttp");                   post.setEntity(entity);                   HttpResponse response=null;                 String strResult="";try {/**客服端向服务器发送请求**/response = client.execute(post);} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}                     /**请求发送成功，并得到响应**/                 if(response.getStatusLine().getStatusCode()==200){  try {  /**读取服务器返回过来的json字符串数据**/   strResult = EntityUtils.toString(response.getEntity());   } catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} JSONObject jsonObject = null;try {/**把json字符串转换成json对象**/jsonObject = getJSON(strResult);} catch (JSONException e1) {// TODO Auto-generated catch blocke1.printStackTrace();} String names="";                     try {                     /**                      * jsonObject.getString("code") 取出code                      * 比如这里返回的json 字符串为 [code:0,msg:"ok",data:[list:{"name":1},{"name":2}]]                      * **/                                          /**得到data这个key**/                     String data=jsonObject.getString("data");                     /**把data下的数据转换成json对象**/                     JSONObject jDat = new JSONObject(data);                     /**判断data对象下的list是否存在**/                     if(jDat.get("list")!=null){                     /**把list转换成jsonArray对象**/                     JSONArray jarr = jDat.getJSONArray("list");                     /**循环list对象**/                     for (int i = 0; i < jarr.length(); i++) {                                          /** **/                     JSONObject jsono = (JSONObject) jarr.get(i);                                           /**取出list下的name的值 **/                     names=names+jsono.getString("name");                              }                     }Toast.makeText(TestHttpActivity.this, "code:"+jsonObject.getString("code")+"name:"+names, Toast.LENGTH_SHORT).show();} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}                                                                 }                   else Toast.makeText(TestHttpActivity.this, "POST提交失败", Toast.LENGTH_SHORT).show();  break;case R.id.btn_get: DefaultHttpClient client1 = new DefaultHttpClient();  /**NameValuePair是传送给服务器的请求参数    param.get("name") **/                                UrlEncodedFormEntity entity1=null; /**新建一个get请求**/                 HttpGet get = new HttpGet("http://aaron-pc.wsd.com/Test/testHttp");                   HttpResponse response1=null;                 String strResult1="";try {/**客服端向服务器发送请求**/response1 = client1.execute(get);} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}                     /**请求发送成功，并得到响应**/                 if(response1.getStatusLine().getStatusCode()==200){  try {  /**读取服务器返回过来的json字符串数据**/   strResult1 = EntityUtils.toString(response1.getEntity());   } catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} JSONObject jsonObject1 = null;try {/**把json字符串转换成json对象**/jsonObject1 = getJSON(strResult1);} catch (JSONException e1) {// TODO Auto-generated catch blocke1.printStackTrace();} String names="";                     try {                     /**                      * jsonObject.getString("code") 取出code                      * 比如这里返回的json 字符串为 [code:0,msg:"ok",data:[list:{"name":1},{"name":2}]]                      * **/                                          /**得到data这个key**/                     String data=jsonObject1.getString("data");                     /**把data下的数据转换成json对象**/                     JSONObject jDat1 = new JSONObject(data);                     /**判断data对象下的list是否存在**/                     if(jDat1.get("list")!=null){                     /**把list转换成jsonArray对象**/                     JSONArray jarr1 = jDat1.getJSONArray("list");                     /**循环list对象**/                     for (int i = 0; i < jarr1.length(); i++) {                                          /** **/                     JSONObject jsono = (JSONObject) jarr1.get(i);                                           /**取出list下的name的值 **/                     names=names+jsono.getString("name");                              }                     }Toast.makeText(TestHttpActivity.this,  "get请求： code:"+jsonObject1.getString("code")+"name:"+names, Toast.LENGTH_SHORT).show();} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}                                                                 }                   else Toast.makeText(TestHttpActivity.this, "get提交失败", Toast.LENGTH_SHORT).show();  break;}}};public JSONObject getJSON(String sb) throws JSONException {          return new JSONObject(sb);      }  }