Java环境百度地图Api的使用
1.介绍
官网地址：http://lbsyun.baidu.com/
百度地图开放平台提供了多种服务接入方式：
2 注册账号、申请AK
要使用百度地图提供的服务，需要注册百度账号、申请服务密钥等，具体步骤如下：
注册百度账号，使用手机号即可完成注册
注册完成后登录
要使用地图服务还需要申请密钥(AK)，地址：http://lbsyun.baidu.com/apiconsole/key#/home
点击"创建应用"按钮，跳转到创建应用页面
应用类型下拉框选项如下：
点击"提交"按钮完成AK创建。
注意：应用类别需要根据我们使用百度地图的方式进行相应选择，如果在网页中通过js方式使用百度地图，应用类别为浏览器端，如果要通过HTTP方式使用百度地图，应用类别为服务端。
3.入门案例
3.1 案例一
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=自己AK"></script>
<title>地图展示</title>
</head>
<body>
<div id="allmap"></div>
</body>
</html>
<script type="text/javascript">
// 百度地图API功能
var map = new BMap.Map("allmap"); // 创建Map实例
map.centerAndZoom(new BMap.Point(116.404, 39.915), 11); // 初始化地图,设置中心点坐标和地图级别
//添加地图类型控件
map.addControl(new BMap.MapTypeControl({
mapTypes:[
BMAP_NORMAL_MAP,
BMAP_HYBRID_MAP
]}));
map.enableScrollWheelZoom(true); //开启鼠标滚轮缩放
</script>
3.2 案例二
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=自己AK"></script>
<title>计算两点间距离</title>
</head>
<body>
<div id="allmap"></div>
</body>
</html>
<script type="text/javascript">
// 百度地图API功能
var map = new BMap.Map("allmap");
map.centerAndZoom("重庆",12); //初始化地图,设置城市和地图级别。
var pointA = new BMap.Point(106.486654,29.490295); // 创建点坐标A--大渡口区
var pointB = new BMap.Point(106.581515,29.615467); // 创建点坐标B--江北区
alert('从大渡口区到江北区的距离是：'+(map.getDistance(pointA,pointB)).toFixed(2)+' 米。'); //获取两点距离,保留小数点后两位
var polyline = new BMap.Polyline([pointA,pointB], {strokeColor:"blue", strokeWeight:6, strokeOpacity:0.5}); //定义折线
map.addOverlay(polyline); //添加折线到地图上
</script>
3.3 案例三
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=自己AK"></script>
<title>单击获取点击的经纬度</title>
</head>
<body>
<div id="allmap"></div>
</body>
</html>
<script type="text/javascript">
// 百度地图API功能
var map = new BMap.Map("allmap");
map.centerAndZoom("北京",12);
//单击获取点击的经纬度
map.addEventListener("click",function(e){
alert(e.point.lng + "," + e.point.lat);
});
</script>
3.4 案例四
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=自己AK"></script>
<title>根据关键字检索</title>
</head>
<body>
<div id="allmap"></div>
<p>返回北京市地图上圆形覆盖范围内的“餐馆”检索结果，并展示在地图上</p>
</body>
</html>
<script type="text/javascript">
// 百度地图API功能
var map = new BMap.Map("allmap"); // 创建Map实例
var mPoint = new BMap.Point(116.404, 39.915);
map.enableScrollWheelZoom();
map.centerAndZoom(mPoint,15);
var circle = new BMap.Circle(mPoint,1000,{fillColor:"blue", strokeWeight: 1 ,fillOpacity: 0.3, strokeOpacity: 0.3});
map.addOverlay(circle);
var local = new BMap.LocalSearch(map, {renderOptions: {map: map, autoViewport: false}});
local.searchNearby('餐馆',mPoint,1000);
</script>
3.5 案例五
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html {width: 100%;height: 100%; margin:0;font-family:"微软雅黑";}
#allmap{height:500px;width:100%;}
#r-result,#r-result table{width:100%;}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=自己AK"></script>
<script type="text/javascript" src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<title>根据起终点名称驾车导航</title>
</head>
<body>
<div id="allmap"></div>
<div id="driving_way">
<select>
<option value="0">最少时间</option>
<option value="1">最短距离</option>
<option value="2">避开高速</option>
</select>
<input type="button" id="result" value="查询"/>
</div>
<div id="r-result"></div>
</body>
</html>
<script type="text/javascript">
// 百度地图API功能
var map = new BMap.Map("allmap");
var start = "天安门";
var end = "金燕龙办公楼";
map.centerAndZoom(new BMap.Point(116.404, 39.915), 11);
map.enableScrollWheelZoom(true); //开启鼠标滚轮缩放
//三种驾车策略：最少时间，最短距离，避开高速
var routePolicy = [BMAP_DRIVING_POLICY_LEAST_TIME,BMAP_DRIVING_POLICY_LEAST_DISTANCE,BMAP_DRIVING_POLICY_AVOID_HIGHWAYS];
$("#result").click(function(){
map.clearOverlays();
var i=$("#driving_way select").val();
search(start,end,routePolicy[i]);
function search(start,end,route){
var driving = new BMap.DrivingRoute(map, {renderOptions:{map: map, autoViewport: true},policy: route});
driving.search(start,end);
}
});
</script>
3.6 案例六
本小节案例来调用百度地图提供的HTTP服务接口，实现地理编码，即根据提供的地址获取经纬度。
可以直接在浏览器中访问上面的接口，output参数指定为json：
output参数指定为xml：
注意：调用上面接口时使用的AK应用类别为服务端。
也可以在Java程序中调用上面的HTTP接口，并解析返回的数据：
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.text.DecimalFormat;
import java.util.Map;
public class BaiduMapTest {
public static void main(String[] args) {
String ak = "自己AK";
String address = "北京市海淀区上地十街10号";
String httpUrl = "http://api.map.baidu.com/geocoding/v3/?address="+address+"&output=json&ak=" + ak;
StringBuilder json = new StringBuilder();
try {
URL url = new URL(httpUrl);
URLConnection urlConnection = url.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8"));
String inputLine = null;
while ((inputLine = in.readLine()) != null) {
json.append(inputLine);
}
in.close();
} catch (MalformedURLException e) {
} catch (IOException e) {
}
System.out.println(json.toString());
String data = json.toString();
if (data != null && !"".equals(data)) {
Map map = JSON.parseObject(data, Map.class);
if ("0".equals(map.getOrDefault("status", "500").toString())) {
Map childMap = (Map) map.get("result");
Map posMap = (Map) childMap.get("location");
double lng = Double.parseDouble(posMap.getOrDefault("lng", "0").toString()); // 经度
double lat = Double.parseDouble(posMap.getOrDefault("lat", "0").toString()); // 纬度
DecimalFormat df = new DecimalFormat("#.######");
String lngStr = df.format(lng);
String latStr = df.format(lat);
String result = lngStr + "," + latStr;
System.out.println(result);
}
}
}
}
3.7 案例七
本小节案例来调用百度地图提供的HTTP服务接口，实现驾车路线规划。
可以直接在浏览器中访问上面的接口：
也可以在Java程序中调用上面的HTTP接口，并解析返回的数据：
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.text.DecimalFormat;
import java.util.Map;
public class BaiduMapTest {
public static void main(String[] args) {
String ak = "自己AK";
String origin = "40.01116,116.339303"; //起点经纬度，格式为：纬度,经度；小数点后不超过6位
String destination = "39.936404,116.452562"; //终点经纬度，格式为：纬度,经度；小数点后不超过6位
String httpUrl = "http://api.map.baidu.com/directionlite/v1/driving?origin="
+origin+"&destination="
+destination+"&ak=" + ak;
StringBuilder json = new StringBuilder();
try {
URL url = new URL(httpUrl);
URLConnection urlConnection = url.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8"));
String inputLine = null;
while ((inputLine = in.readLine()) != null) {
json.append(inputLine);
}
in.close();
} catch (MalformedURLException e) {
} catch (IOException e) {
}
System.out.println(json.toString());
String data = json.toString();
if (data != null && !"".equals(data)) {
Map map = JSON.parseObject(data, Map.class);
if ("0".equals(map.getOrDefault("status", "500").toString())) {
Map childMap = (Map) map.get("result");
JSONArray jsonArray = (JSONArray) childMap.get("routes");
JSONObject jsonObject = (JSONObject) jsonArray.get(0);
double distance = Double.parseDouble(jsonObject.get("distance") == null ? "0" : jsonObject.get("distance").toString());
System.out.println(distance);
}
}
}
}
4.简单工具类
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.text.DecimalFormat;
import java.util.Map;
/**
* 百度地图操作工具类
*/
public class BaiduMapUtils2 {
public static void main(String[] args) {
String origin = getCoordinate("北京市育新花园小区");
String destination = getCoordinate("北京市百度大厦");
Double distance = getDistance(origin, destination);
System.out.println("订单距离：" + distance + "米");
Integer time = getTime(origin, destination);
System.out.println("线路耗时" + time + "秒");
}
private static String AK = "自己AK";
/**
* 调用百度地图地理编码服务接口，根据地址获取坐标（经度、纬度）
*
* @param address
* @return
*/
public static String getCoordinate(String address) {
String httpUrl = "http://api.map.baidu.com/geocoding/v3/?address=" + address + "&output=json&ak=" + AK;
String json = loadJSON(httpUrl);
Map map = JSON.parseObject(json, Map.class);
String status = map.get("status").toString();
if (status.equals("0")) {
//返回结果成功，能够正常解析地址信息
Map result = (Map) map.get("result");
Map location = (Map) result.get("location");
String lng = location.get("lng").toString();
String lat = location.get("lat").toString();
DecimalFormat df = new DecimalFormat("#.######");
String lngStr = df.format(Double.parseDouble(lng));
String latStr = df.format(Double.parseDouble(lat));
String r = latStr + "," + lngStr;
return r;
}
return null;
}
/**
* 调用百度地图驾车路线规划服务接口，根据寄件人地址和收件人地址坐标计算订单距离
*
* @param origin
* @param destination
* @return
*/
public static Double getDistance(String origin, String destination) {
String httpUrl = "http://api.map.baidu.com/directionlite/v1/driving?origin="
+ origin + "&destination="
+ destination + "&ak=" + AK;
String json = loadJSON(httpUrl);
Map map = JSON.parseObject(json, Map.class);
if ("0".equals(map.getOrDefault("status", "500").toString())) {
Map childMap = (Map) map.get("result");
JSONArray jsonArray = (JSONArray) childMap.get("routes");
JSONObject jsonObject = (JSONObject) jsonArray.get(0);
double distance = Double.parseDouble(jsonObject.get("distance") == null ? "0" : jsonObject.get("distance").toString());
return distance;
}
return null;
}
/**
* 调用百度地图驾车路线规划服务接口，根据寄件人地址和收件人地址坐标计算订单距离
*
* @param origin
* @param destination
* @return
*/
public static Integer getTime(String origin, String destination) {
String httpUrl = "http://api.map.baidu.com/directionlite/v1/driving?origin="
+ origin + "&destination="
+ destination + "&ak=" + AK;
String json = loadJSON(httpUrl);
Map map = JSON.parseObject(json, Map.class);
if ("0".equals(map.getOrDefault("status", "500").toString())) {
Map childMap = (Map) map.get("result");
JSONArray jsonArray = (JSONArray) childMap.get("routes");
JSONObject jsonObject = (JSONObject) jsonArray.get(0);
int time = Integer.parseInt(jsonObject.get("duration") == null ? "0" : jsonObject.get("duration").toString());
return time;
}
return null;
}
/**
* 调用服务接口，返回百度地图服务端的结果
*
* @param httpUrl
* @return
*/
public static String loadJSON(String httpUrl) {
StringBuilder json = new StringBuilder();
try {
URL url = new URL(httpUrl);
URLConnection urlConnection = url.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8"));
String inputLine = null;
while ((inputLine = in.readLine()) != null) {
json.append(inputLine);
}
in.close();
} catch (MalformedURLException e) {
} catch (IOException e) {
}
System.out.println(json.toString());
return json.toString();
}
}