Java发送Post请求,参数JSON,接收JSON详解编程语言

/** 
     * 发送post请求 
     * @param url  路径 
     * @param jsonObject  参数(json类型) 
     * @param encoding 编码格式 
     * @return 
     * @throws ParseException 
     * @throws IOException 
     */ 
    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】 
//        httpPost.setHeader("Content-type", "application/x-www-form-urlencoded"); 
        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(); 
        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; 
    }