/**
	 *
	 * @param strUrl
	 *            請求地址
	 * @param params
	 *            請求引數
	 * @param method
	 *            請求方法
	 * @return 網路請求字串
	 * @throws Exception
	 */
	public static String net(String strUrl, Map params, String method) throws Exception {
		HttpURLConnection conn = null;
		BufferedReader reader = null;
		String rs = null;
		try {
			StringBuffer sb = new StringBuffer();
			if (method == null || method.equals("GET")) {
				strUrl = strUrl + "?" + urlencode(params);
			}

			/*
			 * strUrl = strUrl.substring(0, strUrl.length() - 1);
			 * System.out.println(strUrl);
			 */

			URL url = new URL(strUrl);
			conn = (HttpURLConnection) url.openConnection();
			if (method == null || method.equals("GET")) {
				conn.setRequestMethod("GET");
			} else {
				conn.setRequestMethod("POST");
				conn.setDoOutput(true);
			}
			conn.setRequestProperty("User-agent", userAgent);
			conn.setUseCaches(false);
			conn.setConnectTimeout(DEF_CONN_TIMEOUT);
			conn.setReadTimeout(DEF_READ_TIMEOUT);
			conn.setInstanceFollowRedirects(false);
			conn.connect();
			if (params != null && method.equals("POST")) {
				try {
					DataOutputStream out = new DataOutputStream(conn.getOutputStream());
					out.writeBytes(urlencode(params));
				} catch (Exception e) {
					// TODO: handle exception
				}
			}
			InputStream is = conn.getInputStream();
			reader = new BufferedReader(new InputStreamReader(is, DEF_CHATSET));
			String strRead = null;
			while ((strRead = reader.readLine()) != null) {
				sb.append(strRead);
			}
			rs = sb.toString();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (reader != null) {
				reader.close();
			}
			if (conn != null) {
				conn.disconnect();
			}
		}
		return rs;
	}

	// 將map型轉為請求引數型
	public static String urlencode(Map<String, Object> data) {
		StringBuilder sb = new StringBuilder();
		for (Map.Entry i : data.entrySet()) {
			try {
				sb.append(i.getKey()).append("=").append(URLEncoder.encode(i.getValue() + "", "UTF-8")).append("&");
			} catch (UnsupportedEncodingException e) {
				e.printStackTrace();
			}
		}
		return sb.toString();
	}
 

呼叫的時候：

String result = null;
		String url = "http:";// 請求介面地址
		Map params = new HashMap();// 請求引數
		params.put("1", "1");
		params.put("2", 2);// 

		result = net(url, params, "GET");
		System.out.println(result);