Java后台通过传参得到对应的坐标值的方法

public List<String> getMap(String address, String city) {
String returnXml="";
List<String> list=new ArrayList<String>();
try {
address=URLEncoder.encode(address, "UTF-8");
city=URLEncoder.encode(city, "UTF-8");
String urls="http://api.map.baidu.com/geocoder/v2/?ak=07dbeabb4d734364eea7f2eb49eb472b&callback=renderOption&output=xml&address="+address+"&city="+city;
URL url =new URL(urls);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setConnectTimeout(5*1000);
conn.setRequestMethod("GET");

//解析返回来的xml消息体
byte[] msgBody = null;
if (conn.getResponseCode() != 200){
System.out.println("error");
}
InputStream is = (InputStream) conn.getInputStream();//获取返回数据

byte[] temp = new byte[1024];
int n = 0;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
while ((n = is.read(temp)) != -1)
{
bos.write(temp, 0, n);
}
msgBody = bos.toByteArray();
bos.close();
is.close();
returnXml= new String(msgBody, "UTF-8").trim();
conn.disconnect();

// 以下解析XML
System.out.println(returnXml);
Map<String, String> map=new HashMap<String, String>();
SAXReader reader=new SAXReader();
Document document = reader.read(new ByteArrayInputStream(returnXml.getBytes("UTF-8")));
Element rootelement = document.getRootElement();
for (Iterator iterator = rootelement.elementIterator(); iterator.hasNext();) {
Element root = (Element) iterator.next();
for (Iterator iterator1 =root.elementIterator(); iterator1.hasNext();) {
Element it = (Element) iterator1.next();
for (Iterator iterator2 = it.elementIterator(); iterator2.hasNext();) {
Element it1 = (Element) iterator2.next();
if(it1.getName()=="lat"){
String name = it1.getName();
String text = it1.getTextTrim();
map.put(name, text);
}if(it1.getName()=="lng"){
String name = it1.getName();
String text = it1.getTextTrim();
map.put(name, text);
}
}
}
}
for (String key : map.keySet()) {
list.add(map.get(key));
}
} catch (Exception e) {
e.printStackTrace();
}
return list;
}

我这个传过来的参数是省（市）和具体地址，返回得到的是一个xml文件。通过解析xml得到相对应的坐标值，返回的还可以是一个json格式的文件，像下面给出的例子：

private void convertGps2Baidu(List<DBObject> gpsData) {

String ak = configProperties.getProperty("map_ak");
// String ak = "07dbeabb4d734364eea7f2eb49eb472b";
String from = "1";
String to = "5";

String url = configProperties.getProperty("map_url");
// String url = "http://api.map.baidu.com/geoconv/v1/";
Resty r = new Resty();

int maxCount = 100;

int loopCount = gpsData.size() / maxCount;
if (gpsData.size() % maxCount > 0) {
loopCount++;
}

for (int i = 0; i < loopCount; i++) {
String gps = "";

for (int j = 0; j < maxCount; j++) {
int k = j + (i * maxCount);
if (k >= gpsData.size()) {
break;
}

DBObject dbObj = gpsData.get(k);
DBObject gpsObj = (DBObject) dbObj.get("gps");
gps += gpsObj.get("latitude").toString() + "," + gpsObj.get("longitude").toString() + ";";
}

// 去掉最后的分号
if (gps.length() > 0) {
gps = gps.substring(0, gps.length() - 1);
}

JSONResource obj;
try {
obj = r.json(url,
form(data("coords", gps), data("ak", ak), data("from", from), data("to", to)));
int status = (Integer) obj.get("status");
if (status == 0) {
JSONArray baiduGps = (JSONArray) obj.get("result");
for (int j = 0; j < baiduGps.length(); j++) {
DBObject baiduObj = gpsData.get(j + (i * maxCount));
JSONObject baiduMap = (JSONObject) baiduGps.get(j);
DBObject baiduMongoObj = new BasicDBObject();
baiduMongoObj.put("x", baiduMap.get("x"));
baiduMongoObj.put("y", baiduMap.get("y"));
baiduMongoObj.put("s", ((DBObject)baiduObj.get("gps")).get("vss"));

baiduObj.put("b_gps", baiduMongoObj);
//vehDataDao.saveGpsData(baiduObj);
}
} else {
logger.error("baidu GPS convert Error.... status=" + status);
logger.error("GPS row string: " + gps);
}

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}