android HttpClient将数据提交到服务器

1、HttpClient 使用方式

public static String loginByClientGet(String username,String password)
    {
        try {

            //打开浏览器
            HttpClient client = new DefaultHttpClient();

            //输入地址（url）
            String url = "http://192.168.1.100:8088/Login.ashx?username="+username+"&password="+password;
            HttpGet httpGet = new HttpGet(url);

            //按回车（发请求http get请求）
            HttpResponse response = client.execute(httpGet);

            //得到相应码
            int code = response.getStatusLine().getStatusCode();

            if(code==200)
            {
                //得到相应实体
                HttpEntity entity = response.getEntity();
                //得到相应内容
                InputStream is = entity.getContent();
                return StreamUtil.readInputStream(is);
            }
            else
            {
                return null;
            }

        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String loginByClientPost(String username,String password)
    {

        try
        {
            //打开浏览器
            HttpClient client = new DefaultHttpClient();

            //输入地址(输入url)
            String url = "http://192.168.1.100:8088/Login.ashx";
            //使用post请求
            HttpPost httpPost = new HttpPost(url);

            //输入指定提交的数据实体
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("username", username));
            params.add(new BasicNameValuePair("password", password));
            httpPost.setEntity(new UrlEncodedFormEntity(params));

            //得到相应
            HttpResponse response = client.execute(httpPost);

            //得到响应码
            int code = response.getStatusLine().getStatusCode();
            if(code==200)
            {
                //得到相应内容
                InputStream is = response.getEntity().getContent();
                return StreamUtil.readInputStream(is);
            }
            else
            {
                return null;
            }
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
            return null;
        }
    }

2、InputStream转为String方法

package com.example.getserverdata.utils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class StreamUtil {

    public static String readInputStream(InputStream is)
    {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] data = new byte[1024];
        int len = 0;
        try {
            while((len = is.read(data))!=-1)
                baos.write(data, 0, len);
            is.close();
            baos.close();
            return new String(baos.toByteArray());

        } catch (Exception e) {

            e.printStackTrace();
        }  

        return null;
    }
}