準備工作：

百度地圖有json和xml兩種形式儲存資料

3、匯入jar包：此處通過json形式，需匯入jar包

json所需要的jar包如下：

json-lib-2.3-jdk15.jar

json所依賴的jar如下：

commons-beanutils-1.8.0.jar

commons-collections-3.2.1.jar

commons-lang-2.4.jar

commons-logging-1.1.jar

ezmorph-1.0.6.jar

採用maven匯入jar包：

<dependency>
    	<groupId>commons-beanutils</groupId>
    	<artifactId>commons-beanutils-core</artifactId>
    	<version>1.8.0</version>
	</dependency>
<dependency>
    	<groupId>commons-collections</groupId>
    	<artifactId>commons-collections</artifactId>
    	<version>3.2.1</version>
</dependency>
<dependency>
    	<groupId>commons-lang</groupId>  
        <artifactId>commons-lang</artifactId>  
        <version>2.6</version> 
</dependency>
<dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.1.1</version>
</dependency>
<dependency>  
    	<groupId>net.sf.json-lib</groupId>  
    	<artifactId>json-lib</artifactId>  
   	<version>2.3</version>  
    	<classifier>jdk15</classifier>  
</dependency>
<dependency>
	<groupId>net.sf.ezmorph</groupId>
	<artifactId>ezmorph</artifactId>
	<version>1.0.6</version>
</dependency>
 

package cn.zx.ghjmaven.utils;	
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.Map;
import net.sf.json.JSONObject;

/** 
 * @author 作者 : 
 * @createDate 建立時間：
 * 類說明 -- 百度地圖經緯度和地址相互轉換的工具類
 */
public class BaiduMapUtils {
	/**
	 * 百度地圖通過經緯度來獲取地址,傳入引數緯度lat、經度lng
	 * @param lat
	 * @param lng
	 * @return
	 */
	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=ak" +"&pois=0";
		JSONObject obj = JSONObject.fromObject(HttpUtils.getRequest(url));
		System.out.println(obj);
		return obj;
	}

	/**
	 * 百度地圖通過地址來獲取經緯度，傳入引數address
	 * @param address
	 * @return
	 */
	public static Map<String,Double> getLngAndLat(String address){
        Map<String,Double> map=new HashMap<String, Double>();
        String url = "http://api.map.baidu.com/geocoder/v2/?address="+address+"&output=json&ak=ak";
        String json = loadJSON(url);
        JSONObject obj = JSONObject.fromObject(json);
        if(obj.get("status").toString().equals("0")){
            double lng=obj.getJSONObject("result").getJSONObject("location").getDouble("lng");
            double lat=obj.getJSONObject("result").getJSONObject("location").getDouble("lat");
            map.put("lng", lng);
            map.put("lat", lat);
            System.out.println("經度：" + lng + "--- 緯度：" + lat);
        }else{
            System.out.println("未找到相匹配的經緯度！");
        }
        return map;
    }
    public static String loadJSON (String url) {
        StringBuilder json = new StringBuilder();
        try {
            URL oracle = new URL(url);
            URLConnection yc = oracle.openConnection();
            BufferedReader in = new BufferedReader(new InputStreamReader(
                    yc.getInputStream()));
            String inputLine = null;
            while ( (inputLine = in.readLine()) != null) {
                json.append(inputLine);
            }
            in.close();
        } catch (Exception e) {
        }
        return json.toString();
    }
	
}