Java 通过post或get请求获取数据，java调用HttpRequest发起请求

依赖包：

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.kevinsawicki.http.HttpRequest;// **

1、get请求

    public static void main(String[] args) {
    	//参数拼接
        Map<String, String> data = new HashMap<>();
        data.put("num", "xxxxxxx");
        data.put("key", "xxxxxxx");
        // 发起get请求 resp接收返回的数据
        String resp = HttpRequest.get("https://www.kuaidi100.com/autonumber/auto").form(data).body();
        System.out.println("Hello World :::" + resp);
        JSONArray arr = JSON.parseArray(resp);
        JSONObject obj1 = JSONObject.parseObject(arr.get(0).toString());
        System.out.println("Hello World :::" + obj1.get("comCode"));
    }

2、post请求

public static void main(String[] args) {
        String param ="{\"com\":\"jd\",\"num\":\"JDVB10958953772\",\"to\":\"北京朝阳区国际金融大厦\"}";//com 快递公司标识，num:快递单号
        String customer ="xxxxxxxxxx";//这是申请下来的公钥
        String key = "xxxxxxx";//这是申请下来的私钥
        String sign = SignUtils.querySign(param,key,customer);//md5加密
        //参数拼接
        HashMap<String, String> data = new HashMap<String, String>();
        data.put("param",param);
        data.put("sign",sign);
        data.put("customer",customer);
        // 发起post请求 resp1接收返回的数据
        String resp1 = HttpRequest.post("https://poll.kuaidi100.com/poll/maptrack.do").form(data).body();
        JSONObject obj = JSONObject.parseObject(resp1);
        System.out.println("Hello World :::" + obj.get("data"));

    }