import java.io.IOException;  import java.io.InputStream;  import java.io.OutputStream;  import java.net.HttpURLConnection;  import java.net.URL;  import java.net.URLEncoder;  import java.util.Map;      import org.apache.http.protocol.HTTP;      import com.everyone.android.callback.ParseCallback;  import com.everyone.android.callback.ResultCallback;      /**   * 功能描述：通过HTTP协议发送POST请求   * @author android_ls   *   */  public class AsyncHttpPost extends AsyncBaseRequest {          /**       *       */      private static final long serialVersionUID = 3L;          public AsyncHttpPost(String url, Map<String, String> parameter,              ParseCallback handler, ResultCallback requestCallback) {          super(url, parameter, handler, requestCallback);      }          @Override      protected InputStream getRequestResult() throws IOException {          StringBuilder sb = new StringBuilder();          if(parameter!=null && !parameter.isEmpty()){              for(Map.Entry<String, String> entry : parameter.entrySet()){                  sb.append(entry.getKey()).append('=')                      .append(URLEncoder.encode(entry.getValue(), HTTP.UTF_8)).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(requestUrl);          mHttpURLConn = (HttpURLConnection)url.openConnection();          mHttpURLConn.setRequestMethod("POST");          mHttpURLConn.setConnectTimeout(5 * 1000);          // 如果通过post提交数据，必须设置允许对外输出数据          mHttpURLConn.setDoOutput(true);          mHttpURLConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");          mHttpURLConn.setRequestProperty("Content-Length", String.valueOf(entitydata.length));          OutputStream outStream = mHttpURLConn.getOutputStream();          outStream.write(entitydata);          outStream.flush();          outStream.close();          if(mHttpURLConn.getResponseCode()== HttpURLConnection.HTTP_OK){              return mHttpURLConn.getInputStream();          }          return null;      }      }