java通过post请求发送json以及返回json

￡神魔★判官ぃ 2022-11-21 09:53 370阅读 0赞

通过post请求传入请求体为json返回为json

public static void main(String[] args) {
            String q =base64格式的图片;
           JSONObject s= JsonToObject("src",q);
    
    
            System.out.println(s);
            String url ="https://api.mathpix.com/v3/text";
            try {
           String  res =     send(url,s,"utf-8");
                System.out.println(res);
    
            } catch (ParseException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            System.out.println(q);
        }
    public static String send(String url, JSONObject jsonObject, String encoding) throws ParseException, IOException {
            String body = "";
    
            //创建httpclient对象
            CloseableHttpClient client = HttpClients.createDefault();
            //创建post方式请求对象
            HttpPost httpPost = new HttpPost(url);
    
            //装填参数
            StringEntity s = new StringEntity(jsonObject.toString(), "utf-8");
            s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
                    "application/json"));
            //设置参数到请求对象中
            httpPost.setEntity(s);
            System.out.println("请求地址："+url);
    //        System.out.println("请求参数："+nvps.toString());
    
            //设置header信息
            //指定报文头【Content-type】、【User-Agent】{app_id}{app_key}
    
            httpPost.setHeader("app_id", "xxxxxxxxxxxxxxxxxx");
            httpPost.setHeader("app_key", "xxxxxxxxxxxxxxxxxxx");
            httpPost.setHeader("Content-type", "application/json");
            httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
    
            //执行请求操作，并拿到结果（同步阻塞）
            CloseableHttpResponse response = client.execute(httpPost);
            //获取结果实体
            HttpEntity entity = response.getEntity();
            System.out.println(entity);
            if (entity != null) {
                //按指定编码转换结果实体为String类型
                body = EntityUtils.toString(entity, encoding);
            }
            EntityUtils.consume(entity);
            //释放链接
            response.close();
            return body;
        }