[高德开放平台] 定位对接

目标

对接高德开放平台的定位接口

依赖

      
          org.apache.httpcomponents
          httpclient
          4.3
      
      
          org.apache.httpcomponents
          httpmime
          4.3
      

工具类

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.net.URLEncoder;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONObject;
import org.apache.http.client.HttpClient;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.alibaba.fastjson.JSONArray;

/**
 * 定位相关工具
 * 参考：https://blog.csdn.net/u010235716/article/details/51538876
 */
public class AddressUtils {

    // 高德地图API KEY，在高德地图开放平台可以申请到
    public static final String LBS_API_KEY = "xxxxxx";
    public static final String LBS_API_GET_LNG_LAT_URL = "http://restapi.amap.com/v3/geocode/geo";

    public static Double[] getLngAndLatByAmap(String address) throws Exception {
        address = address.trim();
        Map pames = new HashMap<>();
        pames.put("address",URLEncoder.encode(address, "utf-8"));
        pames.put("output","json");
        pames.put("key",LBS_API_KEY);
        String json = HttpUtils.sendGet(LBS_API_GET_LNG_LAT_URL,pames);
        System.out.println(json);
        JSONObject jsonObject = JSONObject.fromObject(json).getJSONArray("geocodes").getJSONObject(0);
        Double[] rest = new Double[2];
        String location = jsonObject.getString("location");
        rest[0] = Double.valueOf(location.split(",")[0]);
        rest[1] = Double.valueOf(location.split(",")[1]);
        return rest;
    }
}

HttpUtils工具类

package com.zp.haveplace.util;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.zip.GZIPInputStream;

import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

/**
 * ClassName: HttpUtils
 * 参考: http://wiki.jikexueyuan.com/project/java-wechat/11.html
 * @Description: http 请求工具类
 * @author dapengniao
 * @date 2016 年 3 月 10 日 下午 3:57:14
 */
@SuppressWarnings("deprecation")
public class HttpUtils {

    /**
     * @Description: http get 请求共用方法
     * @param @param reqUrl
     * @param @param params
     * @param @return
     * @param @throws Exception
     * @author dapengniao
     * @date 2016 年 3 月 10 日 下午 3:57:39
     */
    @SuppressWarnings("resource")
    public static String sendGet(String reqUrl, Map params)
            throws Exception {
        InputStream inputStream = null;
        HttpGet request = new HttpGet();
        try {
            String url = buildUrl(reqUrl, params);
            HttpClient client = new DefaultHttpClient();

            request.setHeader("Accept-Encoding", "gzip");
            request.setURI(new URI(url));

            HttpResponse response = client.execute(request);

            inputStream = response.getEntity().getContent();
            String result = getJsonStringFromGZIP(inputStream);
            return result;
        } finally {
            if (inputStream != null) {
                inputStream.close();
            }
            request.releaseConnection();
        }

    }

    /**
     * @Description: http post 请求共用方法
     * @param @param reqUrl
     * @param @param params
     * @param @return
     * @param @throws Exception
     * @author dapengniao
     * @date 2016 年 3 月 10 日 下午 3:57:53
     */
    @SuppressWarnings("resource")
    public static String sendPost(String reqUrl, Map params)
            throws Exception {
        try {
            Set set = params.keySet();
            List list = new ArrayList();
            for (String key : set) {
                list.add(new BasicNameValuePair(key, params.get(key)));
            }
            if (list.size() > 0) {
                try {
                    HttpClient client = new DefaultHttpClient();
                    HttpPost request = new HttpPost(reqUrl);

                    request.setHeader("Accept-Encoding", "gzip");
                    request.setEntity(new UrlEncodedFormEntity(list, HTTP.UTF_8));

                    HttpResponse response = client.execute(request);

                    InputStream inputStream = response.getEntity().getContent();
                    try {
                        String result = getJsonStringFromGZIP(inputStream);

                        return result;
                    } finally {
                        inputStream.close();
                    }
                } catch (Exception ex) {
                    ex.printStackTrace();
                    throw new Exception("网络连接失败,请连接网络后再试");
                }
            } else {
                throw new Exception("参数不全，请稍后重试");
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            throw new Exception("发送未知异常");
        }
    }

    /**
     * @Description: http post 请求 json 数据
     * @param @param urls
     * @param @param params
     * @param @return
     * @param @throws ClientProtocolException
     * @param @throws IOException
     * @author dapengniao
     * @date 2016 年 3 月 10 日 下午 3:58:15
     */
    public static String sendPostBuffer(String urls, String params)
            throws ClientProtocolException, IOException {
        HttpPost request = new HttpPost(urls);

        StringEntity se = new StringEntity(params, HTTP.UTF_8);
        request.setEntity(se);
        // 发送请求
        @SuppressWarnings("resource")
        HttpResponse httpResponse = new DefaultHttpClient().execute(request);
        // 得到应答的字符串，这也是一个 JSON 格式保存的数据
        String retSrc = EntityUtils.toString(httpResponse.getEntity());
        request.releaseConnection();
        return retSrc;

    }

    /**
     * @Description: http 请求发送 xml 内容
     * @param @param urlStr
     * @param @param xmlInfo
     * @param @return
     * @author dapengniao
     * @date 2016 年 3 月 10 日 下午 3:58:32
     */
    public static String sendXmlPost(String urlStr, String xmlInfo) {
        // xmlInfo xml 具体字符串

        try {
            URL url = new URL(urlStr);
            URLConnection con = url.openConnection();
            con.setDoOutput(true);
            con.setRequestProperty("Pragma:", "no-cache");
            con.setRequestProperty("Cache-Control", "no-cache");
            con.setRequestProperty("Content-Type", "text/xml");
            OutputStreamWriter out = new OutputStreamWriter(
                    con.getOutputStream());
            out.write(new String(xmlInfo.getBytes("utf-8")));
            out.flush();
            out.close();
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    con.getInputStream()));
            String lines = "";
            for (String line = br.readLine(); line != null; line = br
                    .readLine()) {
                lines = lines + line;
            }
            return lines; // 返回请求结果
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "fail";
    }

    private static String getJsonStringFromGZIP(InputStream is) {
        String jsonString = null;
        try {
            BufferedInputStream bis = new BufferedInputStream(is);
            bis.mark(2);
            // 取前两个字节
            byte[] header = new byte[2];
            int result = bis.read(header);
            // reset 输入流到开始位置
            bis.reset();
            // 判断是否是 GZIP 格式
            int headerData = getShort(header);
            // Gzip 流 的前两个字节是 0x1f8b
            if (result != -1 && headerData == 0x1f8b) {
                // LogUtil.i("HttpTask", " use GZIPInputStream  ");
                is = new GZIPInputStream(bis);
            } else {
                // LogUtil.d("HttpTask", " not use GZIPInputStream");
                is = bis;
            }
            InputStreamReader reader = new InputStreamReader(is, "utf-8");
            char[] data = new char[100];
            int readSize;
            StringBuffer sb = new StringBuffer();
            while ((readSize = reader.read(data)) > 0) {
                sb.append(data, 0, readSize);
            }
            jsonString = sb.toString();
            bis.close();
            reader.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return jsonString;
    }

    private static int getShort(byte[] data) {
        return (data[0] << 8) | data[1] & 0xFF;
    }

    /**
     * 构建 get 方式的 url
     *
     * @param reqUrl
     *            基础的 url 地址
     * @param params
     *            查询参数
     * @return 构建好的 url
     */
    public static String buildUrl(String reqUrl, Map params) {
        StringBuilder query = new StringBuilder();
        Set set = params.keySet();
        for (String key : set) {
            query.append(String.format("%s=%s&", key, params.get(key)));
        }
        return reqUrl + "?" + query.toString();
    }

}