java通过百度地图把实际地址转换为经纬度

package com.mvc.action;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import com.mvc.util.StringUtils;

public class test {
    public static void main(String[] args) {
        getGeocoderLatitude("陕西省西安市未央区凤城十路");
    }
    
    public static Map<String,String> getGeocoderLatitude(String address){  
        BufferedReader in = null;  
        try {  
            //将地址转换成utf-8的16进制  
            address = URLEncoder.encode(address, "UTF-8");  
//       如果有代理，要设置代理，没代理可注释  
//      System.setProperty("http.proxyHost","192.168.1.188");  
//      System.setProperty("http.proxyPort","3128");  
            URL tirc = new URL("http://api.map.baidu.com/geocoder?address="+ address +"&output=json&key=7Qzj1aE4foUCgGG3bGmbPvaa");  
              
            in = new BufferedReader(new InputStreamReader(tirc.openStream(),"UTF-8"));  
            String res;  
            StringBuilder sb = new StringBuilder("");  
            while((res = in.readLine())!=null){  
                sb.append(res.trim());  
            }  
            String str = sb.toString();  
            Map<String,String> map = null;  
            if(StringUtils.isNotEmpty(str)){  
                int lngStart = str.indexOf("lng\":");  
                int lngEnd = str.indexOf(",\"lat");  
                int latEnd = str.indexOf("},\"precise");  
                if(lngStart > 0 && lngEnd > 0 && latEnd > 0){  
                    String lng = str.substring(lngStart+5, lngEnd);  
                    String lat = str.substring(lngEnd+7, latEnd);  
                    map = new HashMap<String,String>();  
                    System.out.println("lng ---- " + lng);
                    System.out.println("lat --- " + lat);
                    map.put("lng", lng);  
                    map.put("lat", lat);  
                    return map;  
                }  
            }  
        }catch (Exception e) {  
            e.printStackTrace();  
        }finally{  
            try {  
                in.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }  
        return null;  
    }  
}