post 发送方式

/**

   * post 方式 解码

   */

   public static String getWebContentByPost(String urlString, String data,

        final String charset, int timeout) throws IOException {

      if (urlString == null || urlString.length() == 0) {

        return null;

      }

      urlString = (urlString.startsWith("http://") || urlString.startsWith("https://")) ? urlString : ("http://" + urlString).intern();

      URL url = new URL(urlString);

      System.out.println("url=="+url);

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

      // 设置是否向connection输出，因为这个是post请求，参数要放在 http正文内，因此需要设为true

      connection.setDoOutput(true);

      connection.setDoInput(true);

      connection.setRequestMethod("POST");

      // Post 请求不能使用缓存

      connection.setUseCaches(false);

      connection.setInstanceFollowRedirects(true);

      connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded;charset="+charset+"");

      // 增加报头，模拟浏览器，防止屏蔽

      connection.setRequestProperty("User-Agent",

           "Mozilla/4.0 (compatible; MSIE 8.0; Windows vista)");

      // 只接受text/html类型，当然也可以接受图片,pdf,*/*任意

      connection.setRequestProperty("Accept", "*/*");// text/html

      connection.setConnectTimeout(timeout);

      connection.connect();

      DataOutputStream out = new DataOutputStream(connection

           .getOutputStream());

      byte[] content = data.getBytes(charset);// +URLEncoder.encode("中文 ",

      out.write(content);

      out.flush();

      out.close();

      try {

        // 必须写在发送数据的后面

        if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {

           return null;

        }

      } catch (IOException e) {

        e.printStackTrace();

        return null;

      }

      BufferedReader reader = new BufferedReader(new InputStreamReader(

           connection.getInputStream(), charset));

      String line;

      StringBuffer sb = new StringBuffer();

      while ((line = reader.readLine()) != null) {

        sb.append(line).append("\r\n");

      }

      if (reader != null) {

        reader.close();

      }

      if (connection != null) {

        connection.disconnect();

      }

      System.out.println(sb.toString());

      return URLDecoder.decode(sb.toString(), "utf-8");

   }

public static String getUndecodeByPost(String urlString, String data,

           final String charset, int timeout) throws IOException {

        if (urlString == null || urlString.length() == 0) {

           return null;

        }

        urlString = (urlString.startsWith("http://") || urlString.startsWith("https://")) ? urlString : ("http://" + urlString).intern();

        URL url = new URL(urlString);

        System.out.println("url=="+url);

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

        // 设置是否向connection输出，因为这个是post请求，参数要放在 http正文内，因此需要设为true

        connection.setDoOutput(true);

        connection.setDoInput(true);

        connection.setRequestMethod("POST");

        // Post 请求不能使用缓存

        connection.setUseCaches(false);

        connection.setInstanceFollowRedirects(true);

         connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded;charset="+charset+"");

        // 增加报头，模拟浏览器，防止屏蔽

        connection.setRequestProperty("User-Agent",

              "Mozilla/4.0 (compatible; MSIE 8.0; Windows vista)");

        // 只接受text/html类型，当然也可以接受图片,pdf,*/*任意

        connection.setRequestProperty("Accept", "*/*");// text/html

        connection.setRequestProperty("Content-Length", "*/*");// text/html

        connection.setConnectTimeout(timeout);

        connection.connect();

        DataOutputStream out = new DataOutputStream(connection

              .getOutputStream());

        byte[] content = data.getBytes(charset);// +URLEncoder.encode("中文 ",

        out.write(content);

        out.flush();

        out.close();

        try {

           // 必须写在发送数据的后面

           if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {

              return null;

           }

        } catch (IOException e) {

           e.printStackTrace();

           return null;

        }

        BufferedReader reader = new BufferedReader(new InputStreamReader(

              connection.getInputStream(), charset));

        String line;

        StringBuffer sb = new StringBuffer();

        while ((line = reader.readLine()) != null) {

           sb.append(line).append("\r\n");

        }

        if (reader != null) {

           reader.close();

        }

        if (connection != null) {

           connection.disconnect();

        }

        return sb.toString();

      }