根据地址获取邮编工具类

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.text.StringEscapeUtils;
import org.springframework.web.client.RestTemplate;

import java.util.Optional;

/**
 * @author xdyangchn@163.com
 * @date 2019/3/28 14:01
 * @description 邮编获取工具类
 */
@Slf4j
public class PostCodeUtil {
          
   

    private static final String URL_PREFIX = "http://cpdc.chinapost.com.cn/web/index.php?m=postsearch&c=index&a=ajax_addr&searchkey=";

    /**
     * 通过地址获取邮编信息
     * @param addr -> 地址
     * @return postcode -> 邮编
     */
    public static String getPostCodeByAddr(String addr) {
          
   

        RestTemplate restTemplate = new RestTemplate();
        String response = restTemplate.getForObject(URL_PREFIX + addr, String.class);
        log.info("response = {}", StringEscapeUtils.unescapeJava(response));

        JSONObject jsonResp = JSON.parseObject(response);

        return Optional.ofNullable(jsonResp)
                .map(jsonObject -> jsonObject.getJSONArray("rs"))
                .filter(jsonArray -> jsonArray.size() > 0)
                // 地址不精确导致找到多个默认取第一个
                .map(jsonArray -> jsonArray.getJSONObject(0))
                .map(jsonObject -> jsonObject.getString("POSTCODE"))
                .orElse(StringUtils.EMPTY);
    }

    public static void main(String[] args) {
          
   
        System.out.println(getPostCodeByAddr("广东省深圳市宝安区西乡街道"));
        System.out.println(getPostCodeByAddr("安徽省安庆市宿松县孚玉镇"));
    }

}