如何在java中从地图中获取纬度和经度
我有一个java项目,在这个项目中,我需要从地图中手动指定一个地方的纬度和经度。 实际上,我使用以下代码通过地址获取纬度和经度:如何在java中从地图中获取纬度和经度,java,google-maps,latitude-longitude,Java,Google Maps,Latitude Longitude,我有一个java项目,在这个项目中,我需要从地图中手动指定一个地方的纬度和经度。 实际上,我使用以下代码通过地址获取纬度和经度: public class LongLatService { private static final String GEOCODE_REQUEST_URL = "http://maps.googleapis.com/maps/api/geocode/xml?sensor=false&"; private static HttpClient h
public class LongLatService {
private static final String GEOCODE_REQUEST_URL = "http://maps.googleapis.com/maps/api/geocode/xml?sensor=false&";
private static HttpClient httpClient = new HttpClient(new MultiThreadedHttpConnectionManager());
public static void main(String[] args) throws Exception {
LongLatService tDirectionService = new LongLatService();
tDirectionService.getLongitudeLatitude("Rue Delangle, 58210 Varzy, France");
}
public void getLongitudeLatitude(String address) {
try {
StringBuilder urlBuilder = new StringBuilder(GEOCODE_REQUEST_URL);
if (StringUtils.isNotBlank(address)) {
urlBuilder.append("&address=").append(URLEncoder.encode(address, "UTF-8"));
}
final GetMethod getMethod = new GetMethod(urlBuilder.toString());
try {
httpClient.executeMethod(getMethod);
Reader reader = new InputStreamReader(getMethod.getResponseBodyAsStream(), getMethod.getResponseCharSet());
int data = reader.read();
char[] buffer = new char[1024];
Writer writer = new StringWriter();
while ((data = reader.read(buffer)) != -1) {
writer.write(buffer, 0, data);
}
String result = writer.toString();
System.out.println(result.toString());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader("<"+writer.toString().trim()));
Document doc = db.parse(is);
String strLatitude = getXpathValue(doc, "//GeocodeResponse/result/geometry/location/lat/text()");
System.out.println("Latitude:" + strLatitude);
String strLongtitude = getXpathValue(doc,"//GeocodeResponse/result/geometry/location/lng/text()");
System.out.println("Longitude:" + strLongtitude);
} finally {
getMethod.releaseConnection();
}
} catch (Exception e) {
e.printStackTrace();
}
}
private String getXpathValue(Document doc, String strXpath) throws XPathExpressionException {
XPath xPath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xPath.compile(strXpath);
String resultData = null;
Object result4 = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result4;
for (int i = 0; i < nodes.getLength(); i++) {
resultData = nodes.item(i).getNodeValue();
}
return resultData;
}
}
公共类远程服务{
私有静态最终字符串GEOCODE\u REQUEST\u URL=”http://maps.googleapis.com/maps/api/geocode/xml?sensor=false&";
私有静态HttpClient HttpClient=新HttpClient(新的多线程HttpConnectionManager());
公共静态void main(字符串[]args)引发异常{
LongLatService tDirectionService=新的LongLatService();
tDirectionService.GetLongitudRelational(“法国瓦兹市德兰格街58210号”);
}
public void GetLongitudRelativity(字符串地址){
试一试{
StringBuilder urlBuilder=新的StringBuilder(地理编码\u请求\u URL);
if(StringUtils.isNotBlank(地址)){
urlBuilder.append(“&address=”).append(urlcoder.encode(地址,“UTF-8”);
}
final-GetMethod=new-GetMethod(urlBuilder.toString());
试一试{
httpClient.executeMethod(getMethod);
Reader Reader=新的InputStreamReader(getMethod.getResponseBodyAsStream(),getMethod.getResponseCharSet());
int data=reader.read();
char[]buffer=新字符[1024];
Writer-Writer=新的StringWriter();
而((数据=读卡器。读取(缓冲区))!=-1){
writer.write(缓冲区,0,数据);
}
字符串结果=writer.toString();
System.out.println(result.toString());
DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
DocumentBuilder db=dbf.newDocumentBuilder();
InputSource is=新的InputSource();
is.setCharacterStream(新StringReader("为此,我建议您使用。这是一个由Google为全球Java开发人员开发的库,用于使用各种Google地图功能,如地理编码、方向API、距离矩阵API等。在您的情况下,您可能正在使用返回指定地址的LatLng的地理编码API。您只需集成在您的项目中使用这个库(可以与Maven和Gradle一起使用),然后只需几行代码就可以为您提供通过Google地图传递的地址的纬度和经度
以下是地理代码API需要使用的代码:
GeoApiContext context = new GeoApiContext().setApiKey("AIza...");
GeocodingResult[] results = GeocodingApi.geocode(context,
"1600 Amphitheatre Parkway Mountain View, CA 94043").await();
System.out.println(results[0].formattedAddress);
如果不想使用此库编写自己的代码,可以参考中的代码示例
希望这有帮助!!你说的“从地图”是什么意思?具体的经度和纬度是什么?我的意思是我想要一个包含地图的框架或网页,然后我从地图中选择一个特定的地方,我想从我的java项目中获得经度和纬度