在传输的过程中，统一采用utf-8编码，为了取得汉字，所以流中采用utf-8编码

前两天由于dns接口有变动，我帮忙测试dns解析业务：
由于在传输的过程中涉及到乱码问题，所以在传输的过程中，统一采用utf-8编码。为了能正常显示汉字，所以我们在传输过程中，流也要采用utf-8编码：

public static String getPageContent(String url, String strPostRequest) {
		String strUrl = url;
		// 读取结果网页
		StringBuffer buffer = new StringBuffer();
		System.setProperty("sun.net.client.defaultConnectTimeout", "5000");
		System.setProperty("sun.net.client.defaultReadTimeout", "5000");
		try {
			URL newUrl = new URL(strUrl);
			HttpURLConnection hConnect = (HttpURLConnection) newUrl.openConnection();
			// POST方式的额外数据
			if (strPostRequest.length() > 0) {
				hConnect.setDoOutput(true);
				hConnect.setRequestMethod("POST");
				
				OutputStreamWriter out = new OutputStreamWriter(hConnect.getOutputStream(),"utf-8");
				out.write(strPostRequest);
				out.flush();
				out.close();
			}
			// 读取内容
			BufferedReader rd = new BufferedReader(new InputStreamReader(hConnect.getInputStream(),"utf-8"));
			int ch;
			for (int length = 0; (ch = rd.read()) > -1; length++)
				buffer.append((char) ch);
			rd.close();
			hConnect.disconnect();
			return buffer.toString().trim();
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

说明：以post方法访问url，传输过程中流采用utf-8编码。