Android:HTTP协议访问网络

来源：互联网发布：linux 获取网卡ip 编辑：程序博客网时间：2024/05/29 19:37

Http协议访问网络：

使用HTTP协议访问网络

get请求：

    public static String getJsonByInternet(String path){        try {            URL url = new URL("http://ww.baidu/com");            //打开连接            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();            if(200 == urlConnection.getResponseCode()){                //得到输入流                InputStream is =urlConnection.getInputStream();                ByteArrayOutputStream baos = new ByteArrayOutputStream();                byte[] buffer = new byte[1024];                int len = 0;                while(-1 != (len = is.read(buffer))){                    baos.write(buffer,0,len);                    baos.flush();                }                return baos.toString("utf-8");            }        }  catch (IOException e) {            e.printStackTrace();        }        return null;    }//获取其他页面的数据    /**     * POST请求获取数据     */    public static String postDownloadJson(String path,String post){        URL url = null;        try {            url = new URL(path);            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();            httpURLConnection.setRequestMethod("POST");// 提交模式            // conn.setConnectTimeout(10000);//连接超时 单位毫秒            // conn.setReadTimeout(2000);//读取超时 单位毫秒            // 发送POST请求必须设置如下两行            httpURLConnection.setDoOutput(true);            httpURLConnection.setDoInput(true);            // 获取URLConnection对象对应的输出流            PrintWriter printWriter = new PrintWriter(httpURLConnection.getOutputStream());            // 发送请求参数            printWriter.write(post);//post的参数 xx=xx&yy=yy            // flush输出流的缓冲            printWriter.flush();            //开始获取数据            BufferedInputStream bis = new BufferedInputStream(httpURLConnection.getInputStream());            ByteArrayOutputStream bos = new ByteArrayOutputStream();            int len;            byte[] arr = new byte[1024];            while((len=bis.read(arr))!= -1){                bos.write(arr,0,len);                bos.flush();            }            bos.close();            return bos.toString("utf-8");        } catch (Exception e) {            e.printStackTrace();        }        return null;    }

使用 HttpClient访问网络

get请求:

public class void HttpResquestWithHttpClitent(){    HttpClient client=new DefaultHttpClient();    HttpGet httpGet=new HttpGet("http://www.baidu.com");    HttpResponse httpResponse=client.execute(httpGet);    //判断请求和响应是否成功    if (httpResponse.getStatusLine().getStatusCode()==200) {        HttpEntity entity=httpResponse.getEntity();        String response=EntityUtils.toString(entity);    }}

Post请求：

HttpClient client=new DefaultHttpClient();HttpPost httpPost = new HttpPost("http://www.baidu.com");// NameValuePair集合来存放待提交的参数List<NameValuePair> params = new ArrayList<NameValuePair>();params.add(new BasicNameValuePair("username", "admin"));params.add(new BasicNameValuePair("password", "123456"));//NameValuePair集合传入到一个UrlEncodedFormEntity中UrlEncodedFormEntity entity = new UrlEncodedFormEntity(params, "utf-8");httpPost.setEntity(entity);HttpResponse httpResponse=httpClient.execute(httpPost);//判断请求和响应是否成功if (httpResponse.getStatusLine().getStatusCode()==200) {        HttpEntity entity=httpResponse.getEntity();        String response=EntityUtils.toString(entity);    }

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