Java：http的post请求（带参数json格式）示例代码

import cn.hutool.core.collection.CollectionUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpRequest;
import cn.hutool.http.HttpResponse;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.TypeReference;

public JSONObject sendPost(String url, LoginSsoReq req){
        HttpResponse httpResponse = null;
        try {
            JSONObject json=new JSONObject();
            json.put("client_id",req.getClientId());
            json.put("grant_type",req.getGrantType());
            json.put("code",req.getCode());
            json.put("remote_ip",req.getRemoteIp());
            json.put("redirect_uri",req.getRedirectUri());
            // 设置请求头
            Map<String, String > heads = new HashMap<>();
            heads.put("Content-Type", "application/json;charset=UTF-8");
            httpResponse =  HttpRequest.post(url) // url
                    .headerMap(heads, false) // 请求头设置
                    .body(json.toJSONString()) // json参数
                    .timeout(5 * 60 * 1000) // 超时
                    .execute(); // 请求
            log.info("获取返回服务器的状态码：----- " + httpResponse.getStatus() );
            if(httpResponse.getStatus() == 200){
                //成功后响应数据
                String result = httpResponse.body();
                JSONObject jsonResult = JSONObject.parseObject(result);
                log.info("接口返回数据："+jsonResult.toString());
                return jsonResult;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally{
            try {
                //释放连接
                if(httpResponse != null){
                    httpResponse.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return new JSONObject();
    }