android Http 工具类

package com.phone;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;
import android.util.Log;

public class HttpUtil {
    //创建HttpClient对象
    public static HttpClient httpClient =  new DefaultHttpClient();
    public static final String  BASE_URL = "http://10.254.31.110/blog_client_pack.php";
    
    /**
     * 
     * @param url 发送请求的url
     * @return String 服务器响应字符串
     * @throws Exception
     */
    public static String getRequest(String url ) throws Exception{
        if(url.equals(null)){
            url = BASE_URL;
        }
        Log.d("http", "-------url--------"+url);
        HttpGet get = new HttpGet(url);
        HttpResponse httpResponse = httpClient.execute(get);
        if(httpResponse.getStatusLine().getStatusCode() == 200 ){
            String result = EntityUtils.toString(httpResponse.getEntity());
//            Log.d("http", "-------get--------"+result.length()+";result:"+result);
            return result;
        }
        return null;
    }
    
    /**
     * 
     * @param url 发送请求的url
     * @param rawParams 请求参数
     * @return String 服务器响应字符串
     * @throws Exception
     */
    public static String postRequest(String url, Map<String,String> rawParams ) throws Exception{
        if(url.equals(null)){
            url = BASE_URL;
        }
        //创建HttpPost对象
        HttpPost post = new HttpPost(url);
        //如果传递参数个数比较多，可以对传递的参数进行封装
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        for(String key:rawParams.keySet()){
            //封装请求参数
            params.add(new BasicNameValuePair(key, rawParams.get(key)));
        }

        Log.d("http", params.toString());
        //设置请求参数
        post.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
        //发送post请求
        HttpResponse httpResponse = httpClient.execute(post);
        //如果服务器成功地返回响应
        if(httpResponse.getStatusLine().getStatusCode() == 200 ){
            //获取服务器响应字符串
            String result = EntityUtils.toString(httpResponse.getEntity());
            Log.d("http", "-------post--------"+result.length());
            return result;
        }    
        return null;
    }
    
    private String getData( InputStream inputStream ) throws Exception{
        String data = "";
        //内存缓冲区
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        int len = -1;
        byte[] buf = new byte[1024];
        try{
            while((len = inputStream.read(buf))!= -1 ){
                outputStream.write(buf,0,len);
            }
            byte[] bytes = outputStream.toByteArray();
            data = new String(bytes);
        } catch( IOException e){
            e.printStackTrace();
        }
        return data;
    }
}