android http请求

package jftt.test;



import java.io.IOException;

import java.util.List;



import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.NameValuePair;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

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

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

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

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

import org.apache.http.params.BasicHttpParams;

import org.apache.http.params.HttpConnectionParams;

import org.apache.http.params.HttpParams;



import android.util.Log;



public class HttpRequest {

    /**

     *Post请求

     */

    public void doPost(String url , List<NameValuePair> nameValuePairs){

        //新建HttpClient对象  

        HttpClient httpclient = new DefaultHttpClient();

        //创建POST连接

        HttpPost httppost = new HttpPost(url);

        try {

//            //使用PSOT方式，必须用NameValuePair数组传递参数

//            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();

//            nameValuePairs.add(new BasicNameValuePair("id", "12345"));

//            nameValuePairs.add(new BasicNameValuePair("stringdata","hps is Cool!"));

            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            HttpResponse response = httpclient.execute(httppost);

        } catch (ClientProtocolException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

    

    /**

     *Get请求

     */

    public void doGet(String url){

        HttpParams httpParams = new BasicHttpParams();

        HttpConnectionParams.setConnectionTimeout(httpParams,30000);  

        HttpConnectionParams.setSoTimeout(httpParams, 30000);  

            

        HttpClient httpClient = new DefaultHttpClient(httpParams);  

        // GET

        HttpGet httpGet = new HttpGet(url);

        try {

            HttpResponse response = httpClient.execute(httpGet);

            if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK){

                Log.i("GET", "Bad Request!");

            }

        } catch (IOException e) {

            e.printStackTrace();

        }



    }

}

需要主要的是:

1.    使用POST方式时，传递参数必须使用NameValuePair数组

2.    使用GET方式时，通过URL传递参数，注意写法

3.      通过setEntity方法来发送HTTP请求

4.      通过DefaultHttpClient 的 execute方法来获取HttpResponse

5. 通过getEntity()从Response中获取内容

String content = EntityUtils.toString(response.getEntity()); 

JSON：

    /** 

     *Post请求 

     * @throws IOException 

     * @throws ClientProtocolException 

     */  

    public static String doPost(String url , List<NameValuePair> nameValuePairs) throws ClientProtocolException, IOException{ 

        String result = null;

        //新建HttpClient对象    

        HttpClient httpclient = new DefaultHttpClient();  

        //创建POST连接  

        HttpPost httppost = new HttpPost(url);  

        httppost.setHeader("content-type", "application/json");

        try {

            if(nameValuePairs != null) {

                StringEntity entity = new StringEntity("这里是JSON数据,如{"id":"12","name":"xiaoming"}", "utf-8");

                entity.setContentType("application/json");

                entity.setContentEncoding("utf-8");

                httppost.setEntity(entity);

            }

              

//            if(nameValuePairs != null) {

//                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, HTTP.UTF_8));  

//            }

            HttpResponse response = httpclient.execute(httppost);  

            if (response.getStatusLine().getStatusCode() != 404)

            {

                    result = EntityUtils.toString(response.getEntity());

                    Logger.d(TAG, "Response: " + result);

            }

        } finally {

            

        }

        return result;

    }

特别说明：抄的“右撇子”的。怕他最后删掉了找不着，所以复制过来了。原文链接：

http://blog.csdn.net/feng88724/article/details/6170021