android开发，http工具类，,android的Http

android开发，http工具类，,android的Http

android的HttpClient实现简单的get和post请求```java

/* * Http工具类 /public class HttpUtil { // 创建HttpClient对象 public static HttpClient httpClient = new DefaultHttpClient(); public static final String BASE_URL = "";

/** * get请求 *  * @param url *            发送请求的URL * @return 服务器响应字符串 * @throws Exception */public static String doGet(String url) throws Exception {    // 创建HttpGet对象。    HttpGet get = new HttpGet(url);    // 发送GET请求    HttpResponse httpResponse = httpClient.execute(get);    // 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        HttpEntity entity = httpResponse.getEntity();        InputStream content = entity.getContent();        return convertStreamToString(content);    }    return null;}/** * post请求 *  * @param url *            发送请求的URL * @param params *            请求参数 * @return 服务器响应字符串 * @throws Exception */public static String doPost(String url, Map<String, String> rawParams)        throws Exception {    // 创建HttpPost对象。    HttpPost post = new HttpPost(url);    // 如果传递参数个数比较多的话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)));    }    // 设置请求参数    post.setEntity(new UrlEncodedFormEntity(params, "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        HttpEntity entity = httpResponse.getEntity();        InputStream content = entity.getContent();        return convertStreamToString(content);    }    return null;}/** * 获取服务器的响应，转换为字符串 */private static String convertStreamToString(InputStream is) {    BufferedReader reader = new BufferedReader(new InputStreamReader(is));    StringBuilder sb = new StringBuilder();    String line = null;    try {        while ((line = reader.readLine()) != null) {            sb.append(line);        }    } catch (IOException e) {        e.printStackTrace();    } finally {        try {            is.close();        } catch (IOException e) {            e.printStackTrace();        }    }    return sb.toString();}

}

```