BaiDuGisUtil.java

package com.jiuqi.mobile.lbs.intf.oth;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;

import com.jqmobile.core.utils.json.base64.Base64;
import com.jqmobile.core.utils.json.base64.Base64DecodingException;

class BaiDuGisUtil{

	public static GisPoint correction_84(double dLong, double dLat) {
//		Map<String, String> m = new HashMap<String, String>();
		GisPoint point = new GisPoint();
		point.setGcType(GisCoordinateType.BaiDu);
		try{
			String lon = "0";
			String lat = "0";
			Socket s = new Socket("api.map.baidu.com", 80);
			BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream(), "UTF-8"));
			OutputStream out = s.getOutputStream();
			StringBuffer sb = new StringBuffer("GET /ag/coord/convert?from=0&to=4");
			sb.append("&x=" + dLong + "&y=" + dLat);
			sb.append("&callback=BMap.Convertor.cbk_3976 HTTP/1.1\r\n");
			sb.append("User-Agent: Java/1.6.0_20\r\n");
			sb.append("Host: api.map.baidu.com:80\r\n");
			sb.append("Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2\r\n");
			sb.append("Connection: Close\r\n");
			sb.append("\r\n");
			out.write(sb.toString().getBytes());
			String json = "";
			String tmp = "";
			while ((tmp = br.readLine()) != null) {
				// System.out.println(tmp);
				json += tmp;
			}

			int start = json.indexOf("cbk_3976");
			int end = json.lastIndexOf("}");
			if (start != -1 && end != -1 && json.contains("\"x\":\"")) {
				json = json.substring(start, end);
				String[] p = json.split(",");
				String x = p[1].split(":")[1].replace("\"", "");
				String y = p[2].split(":")[1].replace("\"", "");
				lon = new String(decode(x));
				lat = new String(decode(y));
				// return (new String(decode(x)) + "," + new String(decode(y)));
			} 
//			else {
//				lon = xx;
//				lat = yy;
//			}
			out.close();
			br.close();
			point.setLatitude(Double.parseDouble(lat));
			point.setLongitude(Double.parseDouble(lon));
		}catch(Exception e){
			e.printStackTrace();
		}
//		m.put("x", lon);
//		m.put("y", lat);
		return point;
	}
	public static byte[] decode(String str) {

		byte[] bt = null;

		try {
			return Base64.decode(str);
//			BASE64Decoder decoder = new BASE64Decoder();
//			bt = decoder.decodeBuffer(str);
		} catch (Base64DecodingException e) {
			e.printStackTrace();
		}

		return bt;
	}
	public static GisPoint correction_02(double dLong, double dLat) {
//		Map<String, String> m = new HashMap<String, String>();
		GisPoint point = new GisPoint();
		point.setGcType(GisCoordinateType.BaiDu);
		try{
			String lon = "0";
			String lat = "0";
			Socket s = new Socket("api.map.baidu.com", 80);
			BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream(), "UTF-8"));
			OutputStream out = s.getOutputStream();
			StringBuffer sb = new StringBuffer("GET /ag/coord/convert?from=2&to=4");
			sb.append("&x=" + dLong + "&y=" + dLat);
			sb.append("&callback=BMap.Convertor.cbk_3976 HTTP/1.1\r\n");
			sb.append("User-Agent: Java/1.6.0_20\r\n");
			sb.append("Host: api.map.baidu.com:80\r\n");
			sb.append("Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2\r\n");
			sb.append("Connection: Close\r\n");
			sb.append("\r\n");
			out.write(sb.toString().getBytes());
			String json = "";
			String tmp = "";
			while ((tmp = br.readLine()) != null) {
				// System.out.println(tmp);
				json += tmp;
			}

			int start = json.indexOf("cbk_3976");
			int end = json.lastIndexOf("}");
			if (start != -1 && end != -1 && json.contains("\"x\":\"")) {
				json = json.substring(start, end);
				String[] p = json.split(",");
				String x = p[1].split(":")[1].replace("\"", "");
				String y = p[2].split(":")[1].replace("\"", "");
				lon = new String(decode(x));
				lat = new String(decode(y));
				// return (new String(decode(x)) + "," + new String(decode(y)));
			} 
//			else {
//				lon = xx;
//				lat = yy;
//			}
			out.close();
			br.close();
			point.setLatitude(Double.parseDouble(lat));
			point.setLongitude(Double.parseDouble(lon));
		}catch(Exception e){
			e.printStackTrace();
		}
//		m.put("x", lon);
//		m.put("y", lat);
		return point;
	}

}