调用百度地图API

查找百度地图接口简单五步即可完成，未注册百度账号的需要先注册

第一步：访问百度地图官方网址:https://lbsyun.baidu.com/  --> 控制台 -->应用管理 -->我的应用

 第二步：选择不同的应用类型创建不同的应用

 第三步：找到已经创建好的应用，得到AK密钥，调用百度地图接口需要用到

 第四步：https://lbsyun.baidu.com/  --> 开发文档-->Web服务API

 第五步：找到自己需要调的接口并按照接口规范调用

上面我们讲到如何找到我们需要调用的API,现在看一下Java代码实例。

调用接口如下

controller层  注意参数

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/**     * 参数格式 纬度，经度     * @param origin    33.961656,116.804537     * @param destination 30.539222,117.121283     */    @RequestMapping(value = "/getDirection", method = RequestMethod.GET)    @ApiOperation(value = "两个地点距离和驾车耗时")    public  Map<Object,Object> getDirection(@ApiParam(name = "origin", value = "起源")                            @RequestParam(value = "origin", required = false) String origin,                            @ApiParam(name = "destination", value = "目的地")                            @RequestParam(value = "destination", required = false) String destination) {        return service.getDirection(origin,destination);    }

service层  通过应用AK和API找到的接口url发起请求

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//百度地图 应用AK private static final String ak = "x5oankmSoKM9XEZsbtWPfE7aabnojtI9";    //百度地图 驾车路线规划api private static final String url = "https://api.map.baidu.com/directionlite/v1/driving?origin=";    @Override public Map<Object, Object> getDirection(String origin, String destination) {     Map<Object, Object> map = new HashMap<>();     String s = HttpUtil.doGet(url + origin + "&destination=" + destination + "&ak=" + ak);     System.out.println("响应结果为-------------------" + s);     JSONObject json = JSON.parseObject(JSON.parseArray(JSON.parseObject(JSON.parseObject(s).get("result").toString()).get("routes").toString()).get(0).toString());     // 耗时 单位 秒     String duration = json.get("duration").toString();     // 秒转换成分钟     int num = Integer.valueOf(duration) / 60;     // 距离 单位 米     String distance = json.get("distance").toString();        map.put("duration", num + 1); // 避免等于0     map.put("distance", distance);        System.out.println("两点之间距离为: " + distance + "米");     System.out.println("两点之间驾车时间为: " + num + "分钟");     return map; }

 调用结果如下：

 

 奉上工具类

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import org.apache.commons.io.IOUtils; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.config.RequestConfig; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.conn.ssl.SSLConnectionSocketFactory; import org.apache.http.conn.ssl.SSLContextBuilder; import org.apache.http.conn.ssl.TrustStrategy; import org.apache.http.conn.ssl.X509HostnameVerifier; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.impl.conn.PoolingHttpClientConnectionManager; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLException; import javax.net.ssl.SSLSession; import javax.net.ssl.SSLSocket; import java.io.IOException; import java.io.InputStream; import java.nio.charset.Charset; import java.security.GeneralSecurityException; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.security.KeyManagementException; import java.security.NoSuchAlgorithmException; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; import org.apache.commons.lang3.StringUtils; import org.apache.http.conn.ClientConnectionManager; import org.apache.http.conn.scheme.Scheme; import org.apache.http.conn.scheme.SchemeRegistry; import org.apache.http.conn.ssl.SSLSocketFactory;    /**  * HTTP 请求工具类  */ public class HttpUtil {     private static PoolingHttpClientConnectionManager connMgr;     private static RequestConfig requestConfig;     private static final int MAX_TIMEOUT = 7000;     public HttpUtil()     {                }     static {         // 设置连接池         connMgr = new PoolingHttpClientConnectionManager();         // 设置连接池大小         connMgr.setMaxTotal(100);         connMgr.setDefaultMaxPerRoute(connMgr.getMaxTotal());            RequestConfig.Builder configBuilder = RequestConfig.custom();         // 设置连接超时         configBuilder.setConnectTimeout(MAX_TIMEOUT);         // 设置读取超时         configBuilder.setSocketTimeout(MAX_TIMEOUT);         // 设置从连接池获取连接实例的超时         configBuilder.setConnectionRequestTimeout(MAX_TIMEOUT);         // 在提交请求之前 测试连接是否可用         configBuilder.setStaleConnectionCheckEnabled(true);         requestConfig = configBuilder.build();     }        /**      * 发送 GET 请求（HTTP），不带输入数据      * @param url      */     public static String doGet(String url) {         return doGet(url, new HashMap<String, Object>());     }        /**      * 发送 GET 请求（HTTP），K-V形式      * @param url      * @param params      */     public static String doGet(String url, Map<String, Object> params) {         String apiUrl = url;         StringBuffer param = new StringBuffer();         int i = 0;         for (String key : params.keySet()) {             if (i == 0)                 param.append("?");             else                 param.append("&");             param.append(key).append("=").append(params.get(key));             i++;         }         apiUrl += param;         String result = null;         HttpClient httpclient = new DefaultHttpClient();         try {             HttpGet httpPost = new HttpGet(apiUrl);             HttpResponse response = httpclient.execute(httpPost);             int statusCode = response.getStatusLine().getStatusCode();                //System.out.println("执行状态码 : " + statusCode);                HttpEntity entity = response.getEntity();             if (entity != null) {                 InputStream instream = entity.getContent();                 result = IOUtils.toString(instream, "UTF-8");             }         } catch (IOException e) {             e.printStackTrace();         }         return result;     }        /**      * 发送 POST 请求（HTTP），不带输入数据      * @param apiUrl      * @return      */     public static String doPost(String apiUrl) {         return doPost(apiUrl, new HashMap<String, Object>());     }        /**      * 发送 POST 请求（HTTP），K-V形式      * @param apiUrl API接口URL      * @param params 参数map      */     public static String doPost(String apiUrl, Map<String, Object> params) {         CloseableHttpClient httpClient = HttpClients.createDefault();         String httpStr = null;         HttpPost httpPost = new HttpPost(apiUrl);         CloseableHttpResponse response = null;            try {             httpPost.setConfig(requestConfig);             List<NameValuePair> pairList = new ArrayList<NameValuePair>(params.size());             for (Map.Entry<String, Object> entry : params.entrySet()) {                 NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry                         .getValue().toString());                 pairList.add(pair);             }             httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("UTF-8")));             response = httpClient.execute(httpPost);             System.out.println(response.toString());             HttpEntity entity = response.getEntity();             httpStr = EntityUtils.toString(entity, "UTF-8");         } catch (IOException e) {             e.printStackTrace();         } finally {             if (response != null) {                 try {                     EntityUtils.consume(response.getEntity());                 } catch (IOException e) {                     e.printStackTrace();                 }             }         }         return httpStr;     }        /**      * 发送 POST 请求（HTTP），JSON形式      * @param apiUrl      * @param json json对象      */     public static String doPost(String apiUrl, Object json) {         CloseableHttpClient httpClient = HttpClients.createDefault();         String httpStr = null;         HttpPost httpPost = new HttpPost(apiUrl);         CloseableHttpResponse response = null;            try {             httpPost.setConfig(requestConfig);             StringEntity stringEntity = new StringEntity(json.toString(),"UTF-8");//解决中文乱码问题             stringEntity.setContentEncoding("UTF-8");             stringEntity.setContentType("application/json");             httpPost.setEntity(stringEntity);             response = httpClient.execute(httpPost);             HttpEntity entity = response.getEntity();             System.out.println(response.getStatusLine().getStatusCode());             httpStr = EntityUtils.toString(entity, "UTF-8");         } catch (IOException e) {             e.printStackTrace();         } finally {             if (response != null) {                 try {                     EntityUtils.consume(response.getEntity());                 } catch (IOException e) {                     e.printStackTrace();                 }             }         }         return httpStr;     }        /**      * 发送 SSL POST 请求（HTTPS），K-V形式      * @param apiUrl API接口URL      * @param params 参数map      */     public static String doPostSSL(String apiUrl, Map<String, Object> params) {         CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory()).setConnectionManager(connMgr).setDefaultRequestConfig(requestConfig).build();         HttpPost httpPost = new HttpPost(apiUrl);         CloseableHttpResponse response = null;         String httpStr = null;            try {             httpPost.setConfig(requestConfig);             List<NameValuePair> pairList = new ArrayList<NameValuePair>(params.size());             for (Map.Entry<String, Object> entry : params.entrySet()) {                 NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry                         .getValue().toString());                 pairList.add(pair);             }             httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("utf-8")));             response = httpClient.execute(httpPost);             int statusCode = response.getStatusLine().getStatusCode();             if (statusCode != HttpStatus.SC_OK) {                 return null;             }             HttpEntity entity = response.getEntity();             if (entity == null) {                 return null;             }             httpStr = EntityUtils.toString(entity, "utf-8");         } catch (Exception e) {             e.printStackTrace();         } finally {             if (response != null) {                 try {                     EntityUtils.consume(response.getEntity());                 } catch (IOException e) {                     e.printStackTrace();                 }             }         }         return httpStr;     }        /**      * 发送 SSL POST 请求（HTTPS），JSON形式      * @param apiUrl API接口URL      * @param json JSON对象      */     public static String doPostSSL(String apiUrl, Object json) {         CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory()).setConnectionManager(connMgr).setDefaultRequestConfig(requestConfig).build();         HttpPost httpPost = new HttpPost(apiUrl);         CloseableHttpResponse response = null;         String httpStr = null;            try {             httpPost.setConfig(requestConfig);             StringEntity stringEntity = new StringEntity(json.toString(),"UTF-8");//解决中文乱码问题             stringEntity.setContentEncoding("UTF-8");             stringEntity.setContentType("application/json");             httpPost.setEntity(stringEntity);             response = httpClient.execute(httpPost);             int statusCode = response.getStatusLine().getStatusCode();             if (statusCode != HttpStatus.SC_OK) {                 return null;             }             HttpEntity entity = response.getEntity();             if (entity == null) {                 return null;             }             httpStr = EntityUtils.toString(entity, "utf-8");         } catch (Exception e) {             e.printStackTrace();         } finally {             if (response != null) {                 try {                     EntityUtils.consume(response.getEntity());                 } catch (IOException e) {                     e.printStackTrace();                 }             }         }         return httpStr;     }        /**      * 创建SSL安全连接      */     private static SSLConnectionSocketFactory createSSLConnSocketFactory() {         SSLConnectionSocketFactory sslsf = null;         try {             SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {                    public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {                     return true;                 }             }).build();             sslsf = new SSLConnectionSocketFactory(sslContext, new X509HostnameVerifier() {                    @Override                 public boolean verify(String arg0, SSLSession arg1) {                     return true;                 }                    @Override                 public void verify(String host, SSLSocket ssl) throws IOException {                 }                    @Override                 public void verify(String host, X509Certificate cert) throws SSLException {                 }                    @Override                 public void verify(String host, String[] cns, String[] subjectAlts) throws SSLException {                 }             });         } catch (GeneralSecurityException e) {             e.printStackTrace();         }         return sslsf;     }            /**      * post form调用阿里云短信服务接口      *      * @param host      * @param path      * @param method      * @param headers      * @param querys      * @param bodys      */     public static HttpResponse doPost(String host, String path, String method,             Map<String, String> headers,             Map<String, String> querys,             Map<String, String> bodys)             throws Exception {             HttpClient httpClient = wrapClient(host);            HttpPost request = new HttpPost(buildUrl(host, path, querys));         for (Map.Entry<String, String> e : headers.entrySet()) {             request.addHeader(e.getKey(), e.getValue());         }            if (bodys != null) {             List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();                for (String key : bodys.keySet()) {                 nameValuePairList.add(new BasicNameValuePair(key, bodys.get(key)));             }             UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nameValuePairList, "utf-8");             formEntity.setContentType("application/x-www-form-urlencoded; charset=UTF-8");             request.setEntity(formEntity);         }            return httpClient.execute(request);     }            private static String buildUrl(String host, String path, Map<String, String> querys) throws UnsupportedEncodingException {         StringBuilder sbUrl = new StringBuilder();         sbUrl.append(host);         if (!StringUtils.isBlank(path)) {             sbUrl.append(path);         }         if (null != querys) {             StringBuilder sbQuery = new StringBuilder();             for (Map.Entry<String, String> query : querys.entrySet()) {                 if (0 < sbQuery.length()) {                     sbQuery.append("&");                 }                 if (StringUtils.isBlank(query.getKey()) && !StringUtils.isBlank(query.getValue())) {                     sbQuery.append(query.getValue());                 }                 if (!StringUtils.isBlank(query.getKey())) {                     sbQuery.append(query.getKey());                     if (!StringUtils.isBlank(query.getValue())) {                         sbQuery.append("=");                         sbQuery.append(URLEncoder.encode(query.getValue(), "utf-8"));                     }                                  }             }             if (0 < sbQuery.length()) {                 sbUrl.append("?").append(sbQuery);             }         }            return sbUrl.toString();     }        private static HttpClient wrapClient(String host) {         HttpClient httpClient = new DefaultHttpClient();         if (host.startsWith("https://")) {             sslClient(httpClient);         }            return httpClient;     }        private static void sslClient(HttpClient httpClient) {         try {             SSLContext ctx = SSLContext.getInstance("TLS");             X509TrustManager tm = new X509TrustManager() {                 public X509Certificate[] getAcceptedIssuers() {                     return null;                 }                 public void checkClientTrusted(X509Certificate[] xcs, String str) {                    }                 public void checkServerTrusted(X509Certificate[] xcs, String str) {                    }             };             ctx.init(null, new TrustManager[] { tm }, null);             SSLSocketFactory ssf = new SSLSocketFactory(ctx);             ssf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);             ClientConnectionManager ccm = httpClient.getConnectionManager();             SchemeRegistry registry = ccm.getSchemeRegistry();             registry.register(new Scheme("https", 443, ssf));         } catch (KeyManagementException ex) {             throw new RuntimeException(ex);         } catch (NoSuchAlgorithmException ex) {             throw new RuntimeException(ex);         }     } }