Java okHttp data interface docking tool class

Example JDK is 1.8

1.7 and non-maven projects manually download okhttp, jar + okio.jar

  1.pom.xml introduces dependencies

        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>3.6.0</version>
        </dependency>

2. Data reading uses net.jsonArray that comes with springBoot

import net.sf.json.JSONArray;
import net.sf.json.JsonConfig;

3. Public code docking method

public static List<HashMap<String, Object>> httpPost(String url) {

        try {
            OkHttpClient client = new OkHttpClient();
            String dataCenterToken = getDataCenterToken();
            JSONObject json = new JSONObject(); //创建参数对象
            json.put("username", username); //请求参数
            json.put("token", dataCenterToken);//请求参数
            System.out.println(dataCenterToken);
            RequestBody body = RequestBody.create(MediaType.parse("application/json"), json.toJSONString()); //将请求参数对象传入
            Request request = new Request.Builder()
                    .post(body) //请求方式 .post ; .get; .put; ...
                    .url(url) // 请求地址
                    .addHeader("Content-Type", "application/json")
                    .addHeader("Transfer-Encoding", "chunked")
                    .addHeader("Accept", "*/*")
                    .addHeader("Cache-Control", "no-cache")
                    .addHeader("Host", "sjzx.hebfda.gov.cn")
                    .addHeader("Accept-Encoding", "gzip, deflate")
                    .addHeader("Content-Length", "123")
                    .addHeader("Connection", "keep-alive")
                    .addHeader("cache-control", "no-cache")
                    .build();
            JSONObject jsonObject = JSONObject.parseObject //开始请求
                    (client.newCall(request)
                            .execute()
                            .body()
                            .string());
            if (jsonObject!=null && jsonObject.get("data")!=null) {
                JSONArray jsonArray = JSONArray.fromObject(jsonObject.get("data")); //获取 net.sf.json JSONArray数据
                List<HashMap<String,Object>> list = JSONArray.toList(jsonArray,new HashMap<String,String>(),new JsonConfig());//返回java.List数据
                return list;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }