Java根据百度API获得经纬度

清疚 2022-06-01 14:28 315阅读 0赞

package com.monitoring.controllers;
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.UnsupportedEncodingException;
    import java.net.MalformedURLException;
    import java.net.URL;
    import java.net.URLConnection;
    import java.util.HashMap;
    import java.util.Map;
    
    import org.apache.commons.lang.StringUtils;
    import org.json.JSONObject;
    
    import com.monitoring.common.util.CommonsUtil;
    import com.monitoring.common.util.ResponseObject;
    
    import net.paoding.rose.web.Invocation;
    import net.paoding.rose.web.annotation.Path;
    import net.paoding.rose.web.annotation.rest.Get;
    
    @Path("/position")
    public class LatAndLngByBaiduController {
    
    	/**
    	 * KEY:(开发者密钥).
    	 * @since JDK 1.6
    	 */
    	private static final String KEY = "6rvfbX55tkIitRoMzcNsdegBzajdVab0";
    	
    	@Get("/getCoordinate")
    	public String getCoordinate(Invocation inv) {
    
    		String path = "hello world1";
    		
    
    		return "@" + CommonsUtil.returnObjectToJson(ResponseObject.newSuccessResponseObject(path));
    	}
    
    	/**
    	 * @param addr
    	 *            查询的地址
    	 * @return
    	 * @throws IOException
    	 */
    	private Map<String,String> getCoordinate(String addr) throws IOException {
    		
    		String address = null;
    		try {
    			address = java.net.URLEncoder.encode(addr, "UTF-8");
    		} catch (UnsupportedEncodingException e1) {
    			e1.printStackTrace();
    		}
    //		String key = "6rvfbX55tkIitRoMzcNwfrgBzajdVBw0";
    		String url = String.format("http://api.map.baidu.com/geocoder?address=%s&output=json&key=%s", address, KEY);
    		
    		url = String.format("http://api.map.baidu.com/geocoder/v2/?address=%s&output=json&ak=%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;
    				StringBuilder sb = new StringBuilder();
    				while ((data = br.readLine()) != null) {
    					sb.append(data);
    				}
    				JSONObject object = new JSONObject(sb.toString());
    				int status = object.getInt("status");
    				if(0 == status) {
    					
    					JSONObject result = object.getJSONObject("result");
    					JSONObject location = result.getJSONObject("location");
    //					System.out.println(location);
    					String lng =String.valueOf(location.get("lng"));// 经度
    					String lat = String.valueOf(location.get("lat"));// 纬度
    					
    					Map<String, String> map = new HashMap<String, String>();
    					map.put("lng", lng);
    					map.put("lat", lat);
    					return map;
    				}
    			}
    		} catch (IOException e) {
    			e.printStackTrace();
    		} finally {
    			if (insr != null) {
    				insr.close();
    			}
    			if (br != null) {
    				br.close();
    			}
    		}
    		return null;
    	}
    
    	public static void main(String[] args) throws IOException {
    		LatAndLngByBaiduController getLatAndLngByBaidu = new LatAndLngByBaiduController();
    		Map<String,String> map = getLatAndLngByBaidu.getCoordinate("杭州市");
    		System.out.println(map.get("lng"));// 经度
    		System.out.println(map.get("lat"));// 经度
    	}
    }