Java開発者必読：Amapの行政区画クエリ用の行政区境界データの取得方法

<dependency>
    <groupId>com.amap.api</groupId>
    <artifactId>amap-java-sdk</artifactId>
    <version>1.4.13</version>
</dependency>

import com.amap.api.district.AMapDistrictSearch;
import com.amap.api.district.DistrictResult;
import com.amap.api.district.query.DistrictSearchQuery;
import com.amap.api.district.query.DistrictSearchQueryExtensions;

public class DistrictBoundaryUtil {

    public static String getBoundary(String adcode) {
        AMapDistrictSearch districtSearch = new AMapDistrictSearch();
        DistrictSearchQuery query = new DistrictSearchQuery();
        query.setKeywords(adcode);  // 设置查询关键字为行政区的adcode
        query.setExtensions(DistrictSearchQueryExtensions.BASE);  // 查询行政区边界数据
        districtSearch.setQuery(query);
        DistrictResult districtResult = districtSearch.searchDistrict();
        
        if (districtResult != null && districtResult.getDistrict() != null) {
            return districtResult.getDistrict().get(0).getPolyline();  // 返回行政区的边界数据
        } else {
            return null;
        }
    }
}

public class Main {

    public static void main(String[] args) {
        String adcode = "110101";  // 北京市东城区的adcode
        String boundary = DistrictBoundaryUtil.getBoundary(adcode);
        
        if (boundary != null) {
            System.out.println(boundary);
        } else {
            System.out.println("获取行政区边界数据失败");
        }
    }
}