android 之http网络请求之基本的GET,POST请求一

首先封装一个方法获取httpclient对象

public static HttpClient getHttpClient() {

  // 创建 HttpParams 以用来设置 HTTP 参数（这一部分不是必需的）

  httpParams = new BasicHttpParams();

  // 设置连接超时和 Socket 超时，以及 Socket 缓存大小

  HttpConnectionParams.setConnectionTimeout(httpParams, 20 * 1000);

  HttpConnectionParams.setSoTimeout(httpParams, 20 * 1000);

  HttpConnectionParams.setSocketBufferSize(httpParams, 8192);

  // 设置重定向，缺省为 true

  HttpClientParams.setRedirecting(httpParams, true);

  // 设置 user agent

  String userAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2) Gecko/20100115 Firefox/3.6";

  HttpProtocolParams.setUserAgent(httpParams, userAgent);

  // 创建一个 HttpClient 实例

  // 注意 HttpClient httpClient = new HttpClient(); 是Commons HttpClient

  // 中的用法，在 Android 1.5 中我们需要使用 Apache 的缺省实现 DefaultHttpClient

  httpClient = new DefaultHttpClient(httpParams);

  return httpClient;  }

//post----------------------------------------------------------------------------------------

post请求在数据方法封装：

public static String doPostUrl(String url, List<NameValuePair> params) {   getHttpClient();   /* 建立HTTPPost对象 */   HttpPost httpRequest = new HttpPost(url);

  String strResult = "doPostError";

  try {    /* 添加请求参数到请求对象 */    httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));    /* 发送请求并等待响应 */    HttpResponse httpResponse = httpClient.execute(httpRequest);    /* 若状态码为200 ok */    if (httpResponse.getStatusLine().getStatusCode() == 200) {     /* 读返回数据 */     strResult = EntityUtils.toString(httpResponse.getEntity());

    Log.e("doPostUrl---------->", strResult);    } else {     strResult = "Error Response: "       + httpResponse.getStatusLine().toString();    }   } catch (ClientProtocolException e) {    strResult = e.getMessage().toString();    e.printStackTrace();   } catch (IOException e) {    strResult = e.getMessage().toString();    e.printStackTrace();   } catch (Exception e) {    strResult = e.getMessage().toString();    e.printStackTrace();   }

  return strResult;  }

前面类里调用的代码：

List<NameValuePair> postDate = new ArrayList<NameValuePair>();
  postDate.add(new BasicNameValuePair("ak",
    "B992b6c4de2f497aad02ea7fe60314ce"));
  postDate.add(new BasicNameValuePair("query", URLEncoder.encode("网吧")));
  postDate.add(new BasicNameValuePair("output", "json"));
  postDate.add(new BasicNameValuePair("page_size", "100"));
  postDate.add(new BasicNameValuePair("location", "39.915,116.404"));

//get----------------------------------------------------------------------------------------

public static String doGetUrl(String url, Map<?, ?> params) {   getHttpClient();   /* 建立HTTPGet对象 */   String paramStr = "";   Iterator<?> iter = params.entrySet().iterator();   while (iter.hasNext()) {    @SuppressWarnings("rawtypes")    Map.Entry entry = (Map.Entry) iter.next();    Object key = entry.getKey();    Object val = entry.getValue();    paramStr += paramStr = "&" + key + "=" + val;   }

  if (!paramStr.equals("")) {    paramStr = paramStr.replaceFirst("&", "?");    url += paramStr;   }   HttpGet httpRequest = new HttpGet(url);

  String strResult = "doGetError";

  try {

   /* 发送请求并等待响应 */    HttpResponse httpResponse = httpClient.execute(httpRequest);    /* 若状态码为200 ok */    if (httpResponse.getStatusLine().getStatusCode() == 200) {     /* 读返回数据 */     strResult = EntityUtils.toString(httpResponse.getEntity());

    Log.e("doGet--------->", strResult);    } else {     strResult = "Error Response: "       + httpResponse.getStatusLine().toString();

    Log.e("doPostUrl---------->", strResult);    }   } catch (ClientProtocolException e) {    strResult = e.getMessage().toString();    e.printStackTrace();   } catch (IOException e) {    strResult = e.getMessage().toString();    e.printStackTrace();   } catch (Exception e) {    strResult = e.getMessage().toString();    e.printStackTrace();   }

  Log.v("strResult", strResult);

  return strResult;  }

前面类里调用的方法：

HashMap<String, String> hash = new HashMap<String, String>();
   hash.put("ak", "6cb3f458a482fcd009414370808ea219");
   hash.put("query", URLEncoder.encode("网吧"));//进行URLEncoder对汉字进行编码
   hash.put("output", "json");

//另外的psst---------------------------------------------------------------

public static String doPost(List<NameValuePair> params, String url)    throws Exception {   String result = null;   // 新建HttpPost对象   HttpPost httpPost = new HttpPost(url);   // 设置字符集   HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);   // 设置参数实体   httpPost.setEntity(entity);   // 获取HttpClient对象   HttpClient httpClient = new DefaultHttpClient();   HttpClientParams.setCookiePolicy(httpClient.getParams(),     CookiePolicy.BROWSER_COMPATIBILITY);

  // 连接超时   httpClient.getParams().setParameter(     CoreConnectionPNames.CONNECTION_TIMEOUT, 30000);   // 请求超时   httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,     30000);

  // addcookie   // Cookie cookie = new BasicClientCookie("", "");   // CookieSpecBase cookieSpecBase = new BrowserCompatSpec();   // List<Cookie> cookies = new ArrayList<Cookie>();   // cookies.add(cookie);   // cookieSpecBase.formatCookies(cookies);   // httpPost.setHeader(cookieSpecBase.formatCookies(cookies).get(0));

  try {    // 获取HttpResponse实例    HttpResponse httpResp = httpClient.execute(httpPost);    /**     * get cookie List<Cookie>     * cookiess=client.getCookieStore().getCookies();     * cookiess.get(0).getName(); cookiess.get(0).getValue();     */

   // 判断是够请求成功    if (httpResp.getStatusLine().getStatusCode() == 200) {     // 获取返回的数据     result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");

    Log.e("返回数据-------------->", result);    } else {     Log.i("HttpPost", "HttpPost方式请求失败");    }   } catch (ConnectTimeoutException e) {    result = TIME_OUT;   }

  return result;  }