httpClient post方法 解析json数据（向服务器传递，接受服务器传递））

import org.apache.http.Header;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.message.BasicHeader;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.params.BasicHttpParams;

import org.apache.http.params.HttpConnectionParams;

import org.apache.http.params.HttpParams;

import org.apache.http.protocol.HTTP;

import org.json.JSONException;

import org.json.JSONObject;

import android.app.Activity;

import android.content.Context;

import android.os.Bundle;

import android.util.Log;

import android.widget.TextView;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.UnsupportedEncodingException;

import java.net.HttpURLConnection;

import java.util.ArrayList;

import java.util.List;

public class json extends Activity {

    public Context context;

    private TextView textView1;

    public static String URL = "http://webservice.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl";

    private DefaultHttpClient httpClient;

    StringBuilder result = new StringBuilder();

    private static final int TIMEOUT = 60;

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        HttpParams paramsw = createHttpParams();

        httpClient = new DefaultHttpClient(paramsw);

        HttpPost post = new HttpPost(

                "http://webservice.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl");

        List<NameValuePair> params = new ArrayList<NameValuePair>();

        params.add(new BasicNameValuePair("name", "this is post"));

        try {

            //向服务器写json

            JSONObject json = new JSONObject();

            Object email = null;

            json.put("email", email);

            Object pwd = null;

            json.put("password", pwd);

            StringEntity se = new StringEntity( "JSON: " + json.toString());

            se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));

            post.setEntity(se);

            post.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));

            HttpResponse httpResponse = httpClient.execute(post);

            int httpCode = httpResponse.getStatusLine().getStatusCode();

            if (httpCode == HttpURLConnection.HTTP_OK&&httpResponse!=null) {

                Header[] headers = httpResponse.getAllHeaders();

                HttpEntity entity = httpResponse.getEntity();

                Header header = httpResponse.getFirstHeader("content-type");

                //读取服务器返回的json数据（接受json服务器数据）

                InputStream inputStream = entity.getContent();

                InputStreamReader inputStreamReader = new InputStreamReader(inputStream);

                BufferedReader reader = new BufferedReader(inputStreamReader);// 读字符串用的。

                String s;

                while (((s = reader.readLine()) != null)) {

                    result.append(s);

                }

                reader.close();// 关闭输入流

                //在这里把result这个字符串个给JSONObject。解读里面的内容。

                JSONObject jsonObject = new JSONObject(result.toString());

                String re_username = jsonObject.getString("username");

                String re_password = jsonObject.getString("password");

                int re_user_id = jsonObject.getInt("user_id");

                setTitle("用户id_"+re_user_id);

                Log.v("url response", "true="+re_username);

                Log.v("url response", "true="+re_password);

            } else {

                textView1.setText("Error Response" + httpResponse.getStatusLine().toString());

            }

        } catch (UnsupportedEncodingException e) {

        } catch (ClientProtocolException e) {

        } catch (IOException e) {

        } catch (JSONException e) {

            e.printStackTrace();

        } finally {

            if (httpClient != null) {

                httpClient.getConnectionManager().shutdown();// 最后关掉链接。

                httpClient = null;

            }

        }

    }

    public static final HttpParams createHttpParams() {

        final HttpParams params = new BasicHttpParams();

        HttpConnectionParams.setStaleCheckingEnabled(params, false);

        HttpConnectionParams.setConnectionTimeout(params, TIMEOUT * 1000);

        HttpConnectionParams.setSoTimeout(params, TIMEOUT * 1000);

        HttpConnectionParams.setSocketBufferSize(params, 8192 * 5);

        return params;

    }

}