通过地址获取经纬度和通过经纬度获取地址

淩亂°似流年 2021-11-22 07:58 595阅读 0赞

### **1、通过地址获取该地址的经纬度** ###

/** 
        * @param addr 
        * 查询的地址 
        * @return 
        * @throws IOException 
        */
        public Object[] getCoordinate(String addr) throws IOException { 
            String lng = null;//经度
            String lat = null;//纬度
            String address = null; 
            try { 
                address = java.net.URLEncoder.encode(addr, "UTF-8"); 
            }catch (UnsupportedEncodingException e1) { 
                e1.printStackTrace(); 
            } 
            String key = "f247cdb592eb43ebac6ccd27f796e2d2"; 
            String url = String .format("http://api.map.baidu.com/geocoder?address=%s&output=json&key=%s", address, key); 
            
            URL myURL = null; 
            URLConnection httpsConn = null; 
            try { 
                myURL = new URL(url); 
            } catch (MalformedURLException e) { 
                e.printStackTrace(); 
            } 
            InputStreamReader insr = null;
            BufferedReader br = null;
            try { 
                httpsConn = (URLConnection) myURL.openConnection();// 不使用代理 
                if (httpsConn != null) { 
                    insr = new InputStreamReader( httpsConn.getInputStream(), "UTF-8"); 
                    br = new BufferedReader(insr); 
                    String data = null; 
                    int count = 1;
                    while((data= br.readLine())!=null){ 
                        if(count==5){
                            lng = (String)data.subSequence(data.indexOf(":")+1, data.indexOf(","));//经度
                            count++;
                        }else if(count==6){
                            lat = data.substring(data.indexOf(":")+1);//纬度
                            count++;
                        }else{
                            count++;
                        }
                    } 
                } 
            } catch (IOException e) { 
                e.printStackTrace(); 
            } finally {
                if(insr!=null){
                    insr.close();
                }
                if(br!=null){
                    br.close();
                }
            }
            return new Object[]{lng,lat}; 
        }

测试：

public static void main(String[] args) throws IOException {
            GetLocation getLatAndLngByBaidu = new GetLocation();
            Object[] o = getLatAndLngByBaidu.getCoordinate("成都市天府四街");
            
            System.out.println(o[0]);//经度
            System.out.println(o[1]);//纬度
        }

结果：

104.063832
    30.54855

### **2、通过某个经纬度获取该经纬度的地址** ###

public static void getCityFromLngAndlat() {
        //通过修改这里的location（经纬度）参数，即可得到相应经纬度的详细信息
        String url2 = "http://api.map.baidu.com/geocoder/v2/?ak=pmCgmADsAsD9rEXkqWNcTzjd&location=22.75424,112.76535&output=json&pois=1 ";
        URL myURL2 = null; 
        URLConnection httpsConn2 = null; 
        try { 
            myURL2 = new URL(url2); 
        } catch (MalformedURLException e) { 
            e.printStackTrace(); 
        } 
        InputStreamReader insr2 = null;
        BufferedReader br2 = null;
        try { 
            httpsConn2 = (URLConnection) myURL2.openConnection();// 不使用代理 
            if (httpsConn2 != null) { 
               insr2 = new InputStreamReader( httpsConn2.getInputStream(), "UTF-8"); 
               br2 = new BufferedReader(insr2); 
               String data2 = br2.readLine(); 
               try {
                                         //解析得到的json格式数据
                   JSONObject dataJson = new JSONObject(data2);
                   JSONObject result = dataJson.getJSONObject("result");
                   JSONObject addressComponent = result.getJSONObject("addressComponent");
                   String city = addressComponent.getString("city");
                        
                   System.out.println("city = " + city);
                    
                    
               } catch (JSONException e){
                 e.printStackTrace();
               }
            } 
        } catch (IOException e) { 
           e.printStackTrace(); 
        } finally {
            if(insr2!=null){
               insr2.close();
            }
            if(br!=null){
               br2.close();
            }
        }
    }

获取的json数据如下：

{
        "status": 0, 
        "result": {
            "location": {
                "lng": 112.76535000506, 
                "lat": 22.754240005123
            }, 
            "formatted_address": "广东省佛山市高明区X492", 
            "business": "", 
            "addressComponent": {
                "city": "佛山市", 
                "country": "中国", 
                "direction": "", 
                "distance": "", 
                "district": "高明区", 
                "province": "广东省", 
                "street": "X492", 
                "street_number": "", 
                "country_code": 0
            }, 
            "pois": [
                {
                    "addr": "佛山市高明区", 
                    "cp": "NavInfo", 
                    "direction": "东北", 
                    "distance": "680", 
                    "name": "皂幕山泉", 
                    "poiType": "公司企业", 
                    "point": {
                        "x": 112.76102978437, 
                        "y": 22.750226120112
                    }, 
                    "tag": "公司企业", 
                    "tel": "", 
                    "uid": "ea4a3dc9e82219534e5547fc", 
                    "zip": ""
                }, 
                {
                    "addr": "四九二县道井头圩附近", 
                    "cp": "NavInfo", 
                    "direction": "东北", 
                    "distance": "690", 
                    "name": "乡下酒楼", 
                    "poiType": "美食", 
                    "point": {
                        "x": 112.76288029372, 
                        "y": 22.748959622733
                    }, 
                    "tag": "美食;中餐厅", 
                    "tel": "", 
                    "uid": "b292b3aa9bf25c28be48422f", 
                    "zip": ""
                }, 
                {
                    "addr": "四九二县道井头村附近", 
                    "cp": "NavInfo", 
                    "direction": "东北", 
                    "distance": "724", 
                    "name": "雄英酒楼", 
                    "poiType": "美食", 
                    "point": {
                        "x": 112.76211673404, 
                        "y": 22.74900128402
                    }, 
                    "tag": "美食;中餐厅", 
                    "tel": "", 
                    "uid": "abe37f62d7e119b6cd04efd2", 
                    "zip": ""
                }, 
                {
                    "addr": "四九二县道井头村附近", 
                    "cp": "NavInfo", 
                    "direction": "东北", 
                    "distance": "730", 
                    "name": "名峰酒楼", 
                    "poiType": "美食", 
                    "point": {
                        "x": 112.75995181776, 
                        "y": 22.750776042908
                    }, 
                    "tag": "美食;中餐厅", 
                    "tel": "", 
                    "uid": "2fb890627b93c3a7c91b95e2", 
                    "zip": ""
                }, 
                {
                    "addr": "杨和镇", 
                    "cp": "NavInfo", 
                    "direction": "东北", 
                    "distance": "757", 
                    "name": "山村菜馆", 
                    "poiType": "美食", 
                    "point": {
                        "x": 112.76165859823, 
                        "y": 22.748934625955
                    }, 
                    "tag": "美食;中餐厅", 
                    "tel": "", 
                    "uid": "637df60ac6f49c7241afe68b", 
                    "zip": ""
                }
            ], 
            "poiRegions": [ ], 
            "sematic_description": "皂幕山泉东北680米", 
            "cityCode": 138
        }
    }