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

/**
    * 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

//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

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);
        }
    }
}