google map如何根據地址查詢經緯度

public class GoogleMapDemo {java

    public static void main(String[] args) {
        getGoogleLatLng("廣州市天河區高普路");
        String addr = getGoogleAddres(new BigDecimal(23.1716124),new BigDecimal(113.4106579));
        System.err.println("addr---------------------------------"+addr);json

    }
    public static void getGoogleLatLng(String address) {  
        CloseableHttpClient httpclient = HttpClients.createDefault();  
        try {    
            // 建立httpget.   
  HttpGet httpget = new HttpGet("https://maps.google.com/maps/api/geocode/json?address="+address+"&sensor=false&key=AIzaSyA3a5PwotknVyiN7de6eSZkxkLLpd8hm6k"); 
            // 執行get請求.      
            CloseableHttpResponse response = httpclient.execute(httpget);   
            try {    
                // 獲取響應實體      
                HttpEntity entity = response.getEntity();   
                if (entity != null) {    
                    // 打印響應內容      
                    String str = EntityUtils.toString(entity,"utf-8");  
                    JSONObject o = (JSONObject) JSON.parse(str);  
                    JSONArray o2 = (JSONArray) o.get("results");  
                    JSONObject o3 =  (JSONObject) o2.get(0);  
                    JSONObject o4 = (JSONObject) o3.get("geometry");  
                    JSONObject o5 = (JSONObject)o4.get("location");  
                     //得到打印結果
                    System.err.println("lat====>>>"+o5.get("lat")+";lng=====>>>"+o5.get("lng"));  
                }    
            } finally {    
                response.close();    
            }    
        } catch (ClientProtocolException e) {    
            e.printStackTrace();    
            System.err.println(e.getMessage());  
        }catch (IOException e) {    
            e.printStackTrace();    
            System.err.println(e.getMessage());  
        } finally {   
                httpclient.close();     
        }  
    }  
    //根據經度、緯度獲取地址詳細信息
    public static String getGoogleAddres(BigDecimal lat, BigDecimal lng) {  
        String addr = "";  
        if(null == lat || null == lng){  
            return addr;  
        }  
        CloseableHttpClient httpclient = HttpClients.createDefault();  
        try {             
            // 建立httpget.   ,參數還能夠換成英文的。
            HttpGet httpget = new HttpGet(MessageFormat.format("https://maps.google.com/maps/api/geocode/json?latlng={0},{1}&sensor=false&&language=zh-CN&key=AIzaSyA3a5PwotknVyiN7de6eSZkxkLLpd8hm6k", lat, lng));    
            // 執行get請求.  
            CloseableHttpResponse response = httpclient.execute(httpget);   
            try {    
                // 獲取響應實體      
                HttpEntity entity = response.getEntity();   
                if (entity != null) {    
                    // 打印響應內容      
                    String str = EntityUtils.toString(entity);  
                    JSONObject o = (JSONObject) JSON.parse(str);  
                    JSONArray o1 = (JSONArray)o.get("results"); 
                    JSONObject o2 = (JSONObject)o1.get(0);  
                    if(null != o2){  
                        addr = String.valueOf(o2.get("formatted_address"));  
                    } 
                }  
            } finally {  
                response.close();    
            }    
        } catch (ClientProtocolException e) {    
            e.printStackTrace();    
        } catch (IOException e) {    
            e.printStackTrace();    
        } finally {   
                httpclient.close();  
        }  
        return addr;  
    } api

說明:這是在java後臺還處理google map的相關功能,經過httpClient直接發請求,但這種方式可能性能比較卡,特別須要網絡的支持,通過測試在大陸測試時,常常出現不能鏈接問題,在相關跑一樣的代碼就一直正常。因此這種功能要看狀況使用。網絡

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