android网络通讯之HttpClient4不指定参数名发送Post

         在HttpClient4之前都是通过List<NameValuePair>键值对的形式来向服务器传递参数 ，在4.0版本中在加入了不指定参数名发送数据的形式，利用StringEntity来完成，相当于向一个流写入请求。

        HttpClient4中采用ThreadSafeClientConnManager来保证线程的安全，优于2.0的MultiThreadedHttpConnectionManager类。另外Apache官方强烈推荐只使用一个HttpClient的实例，所以我们可以将以下demo方法写成单例模式。可以参考我的博文http://blog.csdn.net/caicongyang/article/details/9498437

demo将使用StringEntity来完成不指定参数名发送Post，已经采用ThreadSafeClientConnManager来保证线程的安全

   /** 发送报文到GPRS网关 */
   public String sendToHttpClientGprs(String url,String content) {
	BufferedReader reader = null;
	StringBuffer stringBuffer = null;
	   HttpParams httpParams = new BasicHttpParams();     
        // 设置超时
        ConnManagerParams.setTimeout(httpParams, 5*1000);
        HttpConnectionParams.setConnectionTimeout(httpParams, 5*1000);  
        HttpConnectionParams.setSoTimeout(httpParams, 5*1000);   
          
        // 多线程最大连接数  
        ConnManagerParams.setMaxConnectionsPerRoute(httpParams, new ConnPerRouteBean(5));    
        // 多线程总连接数  
        ConnManagerParams.setMaxTotalConnections(httpParams, 10);   
        // 设置异常处理机制
        HttpProtocolParams.setUseExpectContinue(httpParams, true);  
        // 设置是否检查旧连接  
        HttpConnectionParams.setStaleCheckingEnabled(httpParams, false);  
        // 设置版本
        HttpProtocolParams.setVersion(httpParams, HttpVersion.HTTP_1_1);   
	// 设置编码
        HttpProtocolParams.setContentCharset(httpParams, HTTP.UTF_8);   
        // 设置重定向  
        HttpClientParams.setRedirecting(httpParams, false);  
          
        // 设置userAgent 
        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);       
          
        //设置是否延迟发送
        HttpConnectionParams.setTcpNoDelay(httpParams, true);   
          //设置缓存大小
        HttpConnectionParams.setSocketBufferSize(httpParams, DEFAULT_SOCKET_BUFFER_SIZE);    
          
        // 支持http与https
        SchemeRegistry schemeRegistry = new SchemeRegistry();    
        schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));    
        schemeRegistry.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));  
  
		//ThreadSafeClientConnManager线程安全管理类
        ClientConnectionManager manager = new ThreadSafeClientConnManager(httpParams, schemeRegistry);    
        HttpClient   client = new DefaultHttpClient(manager, httpParams);  
		//post请求
		HttpPost httppost =  new HttpPost(path);
		httppost.setHeader("connection", "Keep-Alive");
		httppost.setHeader("Content-Type", "text/plain");
		try {
			//直接传入发送内容，不指定参数名
			StringEntity myEntity = new StringEntity(content, "UTF-8");
			httppost.setEntity(myEntity); 
			// 发送请求
			HttpResponse response = client.execute(httppost);
			Log.i("ResponseCode", response.getStatusLine().getStatusCode() + "");
			// 请求成功
			if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
				reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
				stringBuffer = new StringBuffer();
				String line = "";
				while ((line = reader.readLine()) != null) {
					stringBuffer.append(line);
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}  finally {
			try {
				// 关闭流
				if (null != reader) {
					reader.close();
					reader = null;
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		if (null == stringBuffer) {
			return "-1";
		} else {
			return stringBuffer.toString();
		}
	}