百度地图根据经纬度取得具体的一个地址

1.需要调用百度到的接口，所以需要http的post或者get请求支持，我在网上找到一个util

package com.baidu.adrress;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;public class HttpUtil {	// 连接超时时间	PRivate static final int CONNECTION_TIMEOUT = 3000;	// 读取超时时间	private static final int READ_TIMEOUT = 5000;	// 参数编码	private static final String ENCODE_CHARSET = "utf-8";	/**	 * 发送HTTP_POST请求	 * 	 * @see 本方法默认的连接和读取超时均为30秒	 * @param reqURL请求地址	 * @param params发送到远程主机的正文数据[a:1,b:2]	 * @return String	 */	public static String postRequest(String reqURL, String... params) {		StringBuilder resultData = new StringBuilder();		URL url = null;		try {			url = new URL(reqURL);		} catch (MalformedURLException e) {			e.printStackTrace();		}		HttpURLConnection urlConn = null;		InputStreamReader in = null;		BufferedReader buffer = null;		String inputLine = null;		DataOutputStream out = null;		if (url != null) {			try {				urlConn = (HttpURLConnection) url.openConnection();				urlConn.setDoInput(true);// 设置输入流采用字节流				urlConn.setDoOutput(true);// 设置输出流采用字节流				urlConn.setRequestMethod("POST");				urlConn.setUseCaches(false); // POST请求不能使用缓存				urlConn.setInstanceFollowRedirects(true);				urlConn.setConnectTimeout(CONNECTION_TIMEOUT);// 设置连接超时				urlConn.setReadTimeout(READ_TIMEOUT); // 设置读取超时				// 配置本次连接的Content-type，配置为application/x-www-form-urlencoded的				urlConn.setRequestProperty("Content-Type",						"application/x-www-form-urlencoded");				urlConn.setRequestProperty("Charset", ENCODE_CHARSET);//				String param = sendPostParams(params);				urlConn.setRequestProperty("Content-Length",						param.getBytes().length + "");//				// urlConn.setRequestProperty("Connection", "Keep-Alive");				// //设置长连接				urlConn.connect();// 连接服务器发送消息				if (!"".equals(param)) {					out = new DataOutputStream(urlConn.getOutputStream());					// 将要上传的内容写入流中					out.writeBytes(param);					// 刷新、关闭					out.flush();					out.close();				}				in = new InputStreamReader(urlConn.getInputStream(),						HttpUtil.ENCODE_CHARSET);				buffer = new BufferedReader(in);				if (urlConn.getResponseCode() == 200) {					while ((inputLine = buffer.readLine()) != null) {						resultData.append(inputLine);					}				}			} catch (IOException e) {				e.printStackTrace();			} finally {				try {					if (buffer != null) {						buffer.close();					}					if (in != null) {						in.close();					}					if (urlConn != null) {						urlConn.disconnect();					}				} catch (IOException e) {					e.printStackTrace();				}			}		}		return resultData.toString();	}	/**	 * 发送HTTP_GET请求	 * 	 * @see 本方法默认的连接和读取超时均为30秒	 * @param httpUrl请求地址	 * @param map发送到远程主机的正文数据[a:1,b:2]	 * @return String	 */	public static String getRequest(String httpUrl, String... params) {		StringBuilder resultData = new StringBuilder();		URL url = null;		try {			String paramurl = sendGetParams(httpUrl, params);			url = new URL(paramurl);		} catch (MalformedURLException e) {			e.printStackTrace();		}		HttpURLConnection urlConn = null;		InputStreamReader in = null;		BufferedReader buffer = null;		String inputLine = null;		if (url != null) {			try {				urlConn = (HttpURLConnection) url.openConnection();				urlConn.setRequestMethod("GET");				urlConn.setConnectTimeout(CONNECTION_TIMEOUT);				in = new InputStreamReader(urlConn.getInputStream(),						HttpUtil.ENCODE_CHARSET);				buffer = new BufferedReader(in);				if (urlConn.getResponseCode() == 200) {					while ((inputLine = buffer.readLine()) != null) {						resultData.append(inputLine);					}				}			} catch (IOException e) {				e.printStackTrace();			} finally {				try {					if (buffer != null) {						buffer.close();					}					if (in != null) {						in.close();					}					if (urlConn != null) {						urlConn.disconnect();					}				} catch (IOException e) {					e.printStackTrace();				}			}		}		return resultData.toString();	}	/**	 * Post追加参数	 * 	 * @see <code>params</code>	 * @param reqURL请求地址	 * @param params发送到远程主机的正文数据[a:1,b:2]	 * @return	 */	private static String sendPostParams(String... params) {		StringBuilder sbd = new StringBuilder("");		if (params != null && params.length > 0) {			for (int i = 0; i < params.length; i++) {				String[] temp = params[i].split(":");				sbd.append(temp[0]);				sbd.append("=");				sbd.append(urlEncode(temp[1]));				sbd.append("&");			}			sbd.setLength(sbd.length() - 1);// 删掉最后一个		}		return sbd.toString();	}	/**	 * Get追加参数	 * 	 * @see <code>params</code>	 * @param reqURL 请求地址	 * @param params发送到远程主机的正文数据[a:1,b:2]	 * @return	 */	private static String sendGetParams(String reqURL, String... params) {		StringBuilder sbd = new StringBuilder(reqURL);		if (params != null && params.length > 0) {			if (isexist(reqURL, "?")) {// 存在?				sbd.append("&");			} else {				sbd.append("?");			}			for (int i = 0; i < params.length; i++) {				String[] temp = params[i].split(":");				sbd.append(temp[0]);				sbd.append("=");				sbd.append(urlEncode(temp[1]));				sbd.append("&");			}			sbd.setLength(sbd.length() - 1);// 删掉最后一个		}		return sbd.toString();	}	// 查找某个字符串是否存在	private static boolean isexist(String str, String fstr) {		return str.indexOf(fstr) == -1 ? false : true;	}	/**	 * 编码	 * @param source	 * @return	 */	private static String urlEncode(String source) {		String result = source;		try {			result = java.net.URLEncoder					.encode(source, HttpUtil.ENCODE_CHARSET);		} catch (UnsupportedEncodingException e) {			e.printStackTrace();		}		return result;	}}2.调用百度接口然后返回的是json的字符串，拆分字符串，得到自己想要的东西
package com.baidu.adrress;import com.alibaba.fastjson.JSONObject;import com.baidu.adrress.HttpUtil;public class BaiduUtil {	public static String getCity(String lat, String lng) {		JSONObject obj = getLocationInfo(lat, lng).getJSONObject("result")				.getJSONObject("addressComponent");		return obj.getString("city");	}	public static JSONObject getLocationInfo(String lat, String lng) {		String url = "http://api.map.baidu.com/geocoder/v2/?location=" + lat				+ "," + lng				+ "&output=json&ak=你的密钥&pois=0";		JSONObject obj = JSONObject.parSEObject(HttpUtil.getRequest(url));		System.out.println("/n"+"经纬度查询地址为：" + url);		System.out.println("/n"+"经纬度坐标返回结果为：" + obj.toString());		return obj;	}	public static String getAddress(String lng, String lat) {  //lng经度，lat纬度		JSONObject obj = getLocationInfo(lat, lng).getJSONObject("result");		StringBuilder address = new StringBuilder();		String province = obj.getJSONObject("addressComponent").getString(				"province");		String city = obj.getJSONObject("addressComponent").getString("city");		if (province != null && city != null && province.equals(city)) { 	//直辖市的省份名称和城市名称一样，判断重复时去掉			address.append(					obj.getJSONObject("addressComponent").getString("city"))					.append(obj.getJSONObject("addressComponent").getString(							"district"))					.append(obj.getJSONObject("addressComponent").getString(							"street"))					.append(obj.getString("sematic_description"));		} else {			address.append(					obj.getJSONObject("addressComponent").getString("province"))					.append(obj.getJSONObject("addressComponent").getString(							"city"))					.append(obj.getJSONObject("addressComponent").getString(							"district"))					.append(obj.getJSONObject("addressComponent").getString(							"street"))					.append(obj.getString("sematic_description"));		}		return address.toString();	}	public static void main(String[] args) {		System.out.println("/n"+"经纬度具体地址为："				+ BaiduUtil.getAddress("116.48843","39.994614"));	}}
依照你想得到的数据，自己拆分json，坐标可以用百度的拾取坐标系统去取（http://api.map.baidu.com/lbsapi/getpoint/index.html）