java请求cgi或REST获取数据

POST发送http请求 可请求cgi程序或REST程序获取JSON格式数据串，编码要统一

public static String http(String url, Map<String, String> params) {
		URL u = null;
		HttpURLConnection con = null;
		// 构建请求参数
		StringBuffer sb = new StringBuffer();
		if (params != null) {
			for (Entry<String, String> e : params.entrySet()) {
				sb.append(e.getKey());
				sb.append("=");
				sb.append(e.getValue());
				sb.append("&");
			}
			sb.substring(0, sb.length() - 1);
		}
		System.out.println("send_url:" + url);
		System.out.println("send_data:" + sb.toString());
		// 尝试发送请求
		try {
			u = new URL(url);
			con = (HttpURLConnection) u.openConnection();
			con.setRequestMethod("POST");
			con.setDoOutput(true);
			con.setDoInput(true);
			con.setUseCaches(false);
			con.setRequestProperty("Content-Type",
					"application/x-www-form-urlencoded");
			OutputStreamWriter osw = new OutputStreamWriter(
					con.getOutputStream(), "UTF-8");
			osw.write(sb.toString());
			osw.flush();
			osw.close();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (con != null) {
				con.disconnect();
			}
		}

		// 读取返回内容
		StringBuffer buffer = new StringBuffer();
		try {
			BufferedReader br = new BufferedReader(new InputStreamReader(
					con.getInputStream(), "UTF-8"));
			String temp;
			while ((temp = br.readLine()) != null) {
				buffer.append(temp);
				buffer.append("\n");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}

		return buffer.toString();
	}

Java发送HTTP请求  POST方式



public static void main(String[] args) {

		String REST_IP = "http://" + "202.108.212.148:8080";

		Map<String, String> maps = new HashMap<String, String>();

		maps.put("ti", "605");

		maps.put("tn", "=000132-w00000002");//以此类推 所有参数

		maps.put("at", "2014-10-23 10:27:28");

		maps.put("snum", "0");

		maps.put("re", "0");

		maps.put("ka", "测试22");

		maps.put("et", "2015-10-23 10:27:24");

		maps.put("ty", "2");

		String jsonStr = http(REST_IP + "/rest/topic/update", maps);

		/*Rest rest = new Rest();

		rest.setUrl("/cgi-bin/RealtimeSearch.cgi");

		rest.set("key", key);

		JSONObject json = rest.json(true);*/

		JSONObject json = JSONObject.fromObject(jsonStr);

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

		

		

	}





public static String http(String url, Map<String, String> params) {

		URL u = null;

		HttpURLConnection con = null;

		// 构建请求参数

		StringBuffer sb = new StringBuffer();

		if (params != null) {

			for (Entry<String, String> e : params.entrySet()) {

				sb.append(e.getKey());

				sb.append("=");

				sb.append(e.getValue());

				sb.append("&");

			}

			sb.substring(0, sb.length() - 1);

		}

		System.out.println("send_url:" + url);

		System.out.println("send_data:" + sb.toString());

		// 尝试发送请求

		try {

			u = new URL(url);

			con = (HttpURLConnection) u.openConnection();

			con.setRequestMethod("POST");

			con.setDoOutput(true);

			con.setDoInput(true);

			con.setUseCaches(false);

			con.setRequestProperty("Content-Type",

					"application/x-www-form-urlencoded");

			OutputStreamWriter osw = new OutputStreamWriter(

					con.getOutputStream(), "UTF-8");

			osw.write(sb.toString());

			osw.flush();

			osw.close();

		} catch (Exception e) {

			e.printStackTrace();

		} finally {

			if (con != null) {

				con.disconnect();

			}

		}



		// 读取返回内容

		StringBuffer buffer = new StringBuffer();

		try {

			BufferedReader br = new BufferedReader(new InputStreamReader(

					con.getInputStream(), "UTF-8"));

			String temp;

			while ((temp = br.readLine()) != null) {

				buffer.append(temp);

				buffer.append("\n");

			}

		} catch (Exception e) {

			e.printStackTrace();

		}



		return buffer.toString();

	}