根据百度地图API获取指定地点的经纬度

做项目时，遇到对地点获取地图中对应的经纬度，作一下笔记，以备以后直接使用

package com.hpzx.data;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import com.hpzx.json.HTTPTokener;
import com.hpzx.json.JSONException;

/**
 * 获取经纬度通过
 *
 * @author jueyue 返回格式：Map<String,Object> map map.put("status",
 *         reader.nextString());//状态 map.put("result", list);//查询结果
 *         list<map<String,String>> 密钥:f247cdb592eb43ebac6ccd27f796e2d2
 */
public class GetLatAndLngByBaidu {
	/**
	 * @param addr
	 *            查询的地址
	 * @return
	 * @throws IOException
	 */
	public static String getCoordinate(String addr) throws IOException {
		String address = null;
		try {
			address = java.net.URLEncoder.encode(addr, "UTF-8");
		} catch (UnsupportedEncodingException e1) {
			e1.printStackTrace();
		}
		String key = "f247cdb592eb43ebac6ccd27f796e2d2";
		String url = String
				.format("http://api.map.baidu.com/geocoder?address=%s&output=json&key=%s",
						address, key);
		URL myURL = null;
		URLConnection httpsConn = null;
		try {
			myURL = new URL(url);
		} catch (MalformedURLException e) {
			e.printStackTrace();
		}

		httpsConn = (URLConnection) myURL.openConnection();
		// 不使用代理
		if (httpsConn != null) {
			InputStreamReader insr = null;

			insr = new InputStreamReader(httpsConn.getInputStream(), "UTF-8");

			BufferedReader br = new BufferedReader(insr);
			StringBuffer buf = new StringBuffer();
			String data = null;
			while ((data = br.readLine()) != null) {
				buf.append(data.replace(":", ""));
				// System.out.println(data);
			}
			try {
				return getLoc(buf.toString());
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return null;

	}

	public static String getLoc(String string) throws JSONException {
		StringBuffer buf = new StringBuffer();
		HTTPTokener x = new HTTPTokener(string);
		String t;
		t = x.nextToken();
		while (x.more()) {
			t = x.nextToken();
			if (t.equalsIgnoreCase("lng")) {
				break;
			}
		}
		if (t.equalsIgnoreCase("lng")) {
			buf.append(x.nextToken());
			if (x.nextToken().equals("lat")) {
				buf.append(x.nextToken());
			}
			return buf.toString();
		}
		return null;
	}

	public void getCoordinate(String longitude, String latitude) {
		String url = String
				.format("http://api.map.baidu.com/geocoder?output=json&"
						+ "location=%s,%s%s&key=f247cdb592eb43ebac6ccd27f796e2d2",
						latitude, "%20", longitude);
		URL myURL = null;
		URLConnection httpsConn = null;
		try {
			myURL = new URL(url);
		} catch (MalformedURLException e) {
			e.printStackTrace();
		}
		try {
			httpsConn = (URLConnection) myURL.openConnection();
			if (httpsConn != null) {
				InputStreamReader insr = new InputStreamReader(
						httpsConn.getInputStream(), "UTF-8");
				BufferedReader br = new BufferedReader(insr);
				String data = null;
				while ((data = br.readLine()) != null) {
					System.out.println(data);
				}
				insr.close();
			}
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	public static void main(String[] args) throws IOException {
		String str = "新疆维吾尔自治区哈密市南湖乡大南湖矿区";
		GetLatAndLngByBaidu lotAndLng = new GetLatAndLngByBaidu();
		String result = GetLatAndLngByBaidu.getCoordinate(str).replace(":", "");
		System.out.println(result);
		String[] loc = result.split(",");
		lotAndLng.getCoordinate(loc[0], loc[1]);
	}
}