调用高德地图，通过获取的区域名称得到行政区域详情

一、pom文件：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.java.gaode.GaoDeDemo</groupId>
    <artifactId>GaoDeDemo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>com.google.collections</groupId>
            <artifactId>google-collections</artifactId>
            <version>1.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>20.0</version>
        </dependency>
        <dependency>
            <groupId>commons-httpclient</groupId>
            <artifactId>commons-httpclient</artifactId>
            <version>3.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.8.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.9</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.31</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-client</artifactId>
            <version>1.19.1</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.28</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.1.10.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.10.RELEASE</version>
        </dependency>
    </dependencies>
</project>

二、HttpClientUtil工具类
package com.java.gaode;
/**
 * @ClassName: HttpClientUtil
 * @Description:
 * @Version: v1.0.0
 * @Author: Fu Hao
 * @Date: 2019/10/22 0022 下午 9:32
 * Modification History:
 * Date           Author      Version     Description
 * -------------------------------------------------------------
 * 2019/10/22 0022        Fu Hao      v1.0.0         创建
 */
import com.alibaba.fastjson.JSONObject;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.core.util.MultivaluedMapImpl;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
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.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;

import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import java.io.IOException;
import java.net.URI;
import java.util.*;

/**
 * @author
 * @Description 请求工具类（HttpClient）
 * @date 2018/11/16 10:09
 */
@Controller
public class HttpClientUtil {

    private static final Logger logger = LoggerFactory.getLogger(HttpClientUtil.class);

    /**
     * @Description 发送get请求（带参数）
     * @author HeLiu
     * @date 2018/11/16 11:02
     */
    public static String doGet(String url, Map<String, Object> params) {
        if (!StringUtils.hasText(url)) {
            return "";
        }
        HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
        CloseableHttpClient closeableHttpClient = httpClientBuilder.build();
        try {
            if (params != null && !params.isEmpty()) {
                List<NameValuePair> pairs = new ArrayList<NameValuePair>(params.size());
                for (String key : params.keySet()) {
                    pairs.add(new BasicNameValuePair(key, params.get(key).toString()));
                }
                url += "?" + EntityUtils.toString(new UrlEncodedFormEntity(pairs, "UTF-8"));
            }
            HttpGet httpGet = new HttpGet(url);
            CloseableHttpResponse response = closeableHttpClient.execute(httpGet);
            HttpEntity entity = response.getEntity();
            // 判断响应实体是否为空
            if (entity != null) {
                return EntityUtils.toString(entity, "UTF-8");
            } else {
                return null;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                // 关闭流并释放资源
                closeableHttpClient.close();
            } catch (IOException e) {
                logger.error(e.toString());
            }
        }
        return null;
    }

    /**
     * @Description 发送post请求（带参数）
     * @author HeLiu
     * @date 2018/11/16 11:02
     */
    public static Map doPost(String url, Map<String, Object> param) {
        try {
            Client client = Client.create();
            URI u = new URI(url);
            WebResource resource = client.resource(u);
            MultivaluedMap<String, String> params = new MultivaluedMapImpl();

            Iterator i$ = param.entrySet().iterator();
            while (i$.hasNext()) {
                Map.Entry<String, List<String>> e = (Map.Entry) i$.next();
                params.add(e.getKey(), String.valueOf(e.getValue()));
            }

            logger.info("查询参数:" + params.toString());
            String result = resource.type(MediaType.APPLICATION_FORM_URLENCODED).post(String.class, params);

            logger.info("url = :{},返回结果：{}", url, result);
            JSONObject jasonObject = JSONObject.parseObject(result);
            return (Map) jasonObject;

        } catch (Exception e) {
            logger.error("..........", e);
        }
        return null;
    }

}

三、测试

package com.java.gaode;

import com.alibaba.fastjson.JSONObject;

import java.util.HashMap;
import java.util.Map;

/**
 * gaode包里的两个方法是根据传来的值查询下一级行政区域的目录详情
 * @ClassName: GaoTest
 * @Description:
 * @Version: v1.0.0
 * @Author: Fu Hao
 * @Date: 2019/10/22 0022 下午 9:30
 * Modification History:
 * Date           Author      Version     Description
 * -------------------------------------------------------------
 * 2019/10/22 0022        Fu Hao      v1.0.0         创建
 */
public class GaoTest {
    public static void main(String[] args) {
        String keyName = "中国";//这里是key名称
        String keyCode = "高德官网申请";//这个是秘钥
        String admAddress = "https://restapi.amap.com/v3/config/district";
        Map<String, Object> params = new HashMap<>();

        params.put("key", keyCode);
        params.put("keywords", keyName);
        params.put("subdistrict", 1);
        params.put("extensions", "base");
        String result = HttpClientUtil.doGet(admAddress, params);
        System.out.println(JSONObject.parse(result));
    }
}