java百度地图根据地址获取经纬度

package com.util;
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 org.apache.commons.lang.StringUtils;

public class LatitudeUtils {

public static final String KEY_1 = "7d9fbeb43e975cd1e9477a7e5d5e192a";
// String key2 = "8ec6cd98bd56554407a207d597c0f3e5";
// String key3 = "be025dc280e1e3f7ffb95fe42a01fab2";
// String key4 = "327db7009617d6806b9c38e819ea06ac";

/**
* 返回输入地址的经纬度坐标
* key lng(经度),lat(纬度)
*/
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="+ KEY_1);

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>();
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;
}
public static void main(String args[]){
Map<String, String> json = LatitudeUtils.getGeocoderLatitude("北京亮马桥");
System.out.println("lng : "+json.get("lng"));
System.out.println("lat : "+json.get("lat"));
}

}