HTTP的get,post,HttpClient三种方式向服务器端提交文本数据

Android之使用HTTP的get,post,HttpClient三种方式向服务器端提交文本数据

客户端代码示例:

 

public class HttpRequest   

{     

    public static boolean sendXML(String path, String xml)throws Exception  

    {  

        byte[] data = xml.getBytes();  

        URL url = new URL(path);  

        HttpURLConnection conn = (HttpURLConnection)url.openConnection();  

        conn.setRequestMethod("POST");  

        conn.setConnectTimeout(5 * 1000);  

        //如果通过post提交数据，必须设置允许对外输出数据  

        conn.setDoOutput(true);  

        conn.setRequestProperty("Content-Type", "text/xml; charset=UTF-8");  

        conn.setRequestProperty("Content-Length", String.valueOf(data.length));  

        OutputStream outStream = conn.getOutputStream();  

        outStream.write(data);  

        outStream.flush();  

        outStream.close();  

        if(conn.getResponseCode()==200)  

        {  

            return true;  

        }  

        return false;  

    }  

     

    public static boolean sendGetRequest(String path, Map<String, String> params, String enc) throws Exception  

    {  

        //构造如下形式的字符串，这里的字符串依情况不同  

        // ?method=save&title=435435435&timelength=89&        

        //使用StringBuilder对象  

        StringBuilder sb = new StringBuilder(path);  

        sb.append('?');       

        //迭代Map  

        for(Map.Entry<String, String> entry : params.entrySet())  

        {  

            sb.append(entry.getKey()).append('=')  

                .append(URLEncoder.encode(entry.getValue(), enc)).append('&');  

        }  

        sb.deleteCharAt(sb.length()-1);  

        //打开链接  

        URL url = new URL(sb.toString());  

        HttpURLConnection conn = (HttpURLConnection)url.openConnection();  

        conn.setRequestMethod("GET");  

        conn.setConnectTimeout(5 * 1000);  

        //如果请求响应码是200，则表示成功  

        if(conn.getResponseCode()==200)  

        {  

            return true;  

        }  

        return false;  

    }  

      

     

    public static boolean sendPostRequest(String path, Map<String, String> params, String enc) throws Exception  

    {  

        //需要构造的字符串形式如下：  

        // title=dsfdsf&timelength=23&method=save  

        StringBuilder sb = new StringBuilder();  

        //如果参数不为空  

        if(params!=null && !params.isEmpty())  

        {  

            for(Map.Entry<String, String> entry : params.entrySet())  

            {  

                //Post方式提交参数的话，不能省略内容类型与长度  

                sb.append(entry.getKey()).append('=')  

                    .append(URLEncoder.encode(entry.getValue(), enc)).append('&');  

            }  

            sb.deleteCharAt(sb.length()-1);  

        }  

        //得到实体的二进制数据  

        byte[] entitydata = sb.toString().getBytes();  

        URL url = new URL(path);  

        HttpURLConnection conn = (HttpURLConnection)url.openConnection();  

        conn.setRequestMethod("POST");  

        conn.setConnectTimeout(5 * 1000);  

        //如果通过post提交数据，必须设置允许对外输出数据  

        conn.setDoOutput(true);  

        //这里只设置内容类型与内容长度的头字段  

        //内容类型Content-Type: application/x-www-form-urlencoded  

        //内容长度Content-Length: 38  

        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  

        conn.setRequestProperty("Content-Length", String.valueOf(entitydata.length));  

        OutputStream outStream = conn.getOutputStream();  

        //把实体数据写入是输出流  

        outStream.write(entitydata);  

        //内存中的数据刷入  

        outStream.flush();  

        outStream.close();  

        //如果请求响应码是200，则表示成功  

        if(conn.getResponseCode()==200)  

        {  

            return true;  

        }  

        return false;  

    }  

      

     

    public static boolean sendRequestFromHttpClient(String path, Map<String, String> params, String enc) throws Exception  

    {  

        //需要把参数放到NameValuePair  

        List<NameValuePair> paramPairs = new ArrayList<NameValuePair>();  

        if(params!=null && !params.isEmpty())  

        {  

            for(Map.Entry<String, String> entry : params.entrySet())  

            {  

                paramPairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));  

            }  

        }  

        //对请求参数进行编码，得到实体数据  

        UrlEncodedFormEntity entitydata = new UrlEncodedFormEntity(paramPairs, enc);  

        //构造一个请求路径  

        HttpPost post = new HttpPost(path);   

        //设置请求实体  

        post.setEntity(entitydata);  

        //浏览器对象  

        DefaultHttpClient client = new DefaultHttpClient();   

        //执行post请求  

        HttpResponse response = client.execute(post);  

        //从状态行中获取状态码，判断响应码是否符合要求  

        if(response.getStatusLine().getStatusCode()==200)  

        {  

            return true;  

        }  

        return false;  

    }  

}