//android

public class GoWinHttp {
//通过post获得数据
    public static String postHttpData(String url,List<NameValuePair> nameValuePairs)
    {
        String resultStr=null;
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);
try {
                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                HttpResponse response; 
                response=httpclient.execute(httppost);     
                resultStr=EntityUtils.toString(response.getEntity());
            } catch (UnsupportedEncodingException e) {
                Log.d(url, "UnsupportedEncodingException");
                e.printStackTrace();
            } catch (ClientProtocolException e) {
                Log.d(url, "ClientProtocolException");
                e.printStackTrace();
            } catch (IOException e) {
                Log.d(url, "IOException");
                e.printStackTrace();
            }
return resultStr; 
    }
}

List<NameValuePair> nameValuePairs  构建  这是，post给php的参数
nameValuePairs.add(new BasicNameValuePair("key","value"));

//解析JSON数据
    public static List<Map<String,String>>resolveData(String jsonStr)
    {
        List<Map<String,String>>ls=new ArrayList<Map<String,String>>();
        Map<String,String> data;
        JSONObject jsonObject;
        JSONArray jsonArr;
        JSONArray nameArr;
try {
            jsonArr=new JSONArray(jsonStr);
for(int i=0;i<jsonArr.length();i++)
            {
                jsonObject=jsonArr.getJSONObject(i);
                nameArr=jsonObject.names();
                data=new HashMap<String,String>();
                String name;
for(int j=0;j<nameArr.length();j++)
                {
                    name=nameArr.getString(j);
                    data.put(name, jsonObject.getString(name));
                }
                ls.add(data);                
            }

        } catch (JSONException e) {
// TODO Auto-generated catch block
            e.printStackTrace();
        }
return ls;        
    }

<?php
//获取一张表的所有数据
function getTabDatas($tabName,$link){
if($tabName=="")
    {
exit;
    }
$sqlStr='SELECT * FROM '.$tabName;    
$result = mysql_query($sqlStr, $link);
if (!$result) {
exit;    
    }   
$fields= array();
for ($i=0; $i<mysql_num_fields($result); $i++)
    {     
$fields[] =mysql_field_name($result, $i);      
    }    
$arr=array();
while ($row = mysql_fetch_assoc($result)) {
$once=array();

foreach ($fields as $value)
        {
$once[$value]=$row[$value];           
        }

$arr[]=$once;    
    }    
mysql_free_result($result);    
    closeSqlconn();
return $arr;
}
?>

 $json_string = json_encode($resArr);
echo $json_string;

//超时请求
        httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 5000);
//读取超时
        httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 5000);