简单的使用httpclient调接口发送和接收JSon

本是古典何须时尚 2022-06-08 00:12 607阅读 0赞

由于项目需要，需要用httpclient调其他部门的接口获取信息，学习了httpclient的使用方法，demo大概代码如下：

public static List<Object> doPost(String url, JSONObject json, String infoname, Class cl){
    
            CloseableHttpClient httpclient = HttpClientBuilder.create().build();
            HttpPost post = new HttpPost(url);
            JSONObject response = null;
            List<Object> list=new ArrayList();
            try {
                StringEntity s = new StringEntity(json.toString());
                s.setContentEncoding("UTF-8");
                s.setContentType("application/json");//发送json数据需要设置contentType
                post.setEntity(s);
                HttpResponse res = httpclient.execute(post);
                if(res.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                    String result = EntityUtils.toString(res.getEntity());// 返回json格式：
                    System.out.println(result);
                    response = JSONObject.parseObject(result);
                    List<JSONObject> info = (List) response.get(infoname);
    
                    for (JSONObject s1 : info) {
                        Object netDownData = (Object) JSONObject.toJavaObject(s1, cl);
                        list.add(netDownData);
    
                    }
    
                }else{
                        logger.error("拉取失败,错误编码为："+res.getStatusLine().getStatusCode());
                    }
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
            return list;
        }

写完后，发现可以使用HttpUtil 工具类调取。这里就不列出了