post接口请求

 String url ="http://11.1.1.1:8080/hh";
        PrintWriter out = null ;
        BufferedReader in = null;
        JSONObject js = new JSONObject();
        js.put("参数名","值");
        js.put("参数名","值");
        js.put("token","585402f200244ed580aa35fe20f90a07");
        StringBuilder result = new StringBuilder();
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
            //设置通用的请求头属性
            conn.setRequestProperty("Content-Type","application/json");
            // 发送POST请求必须设置如下两行   否则会抛异常（java.net.ProtocolException: cannot write to a URLConnection if doOutput=false - call setDoOutput(true)）
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setRequestMethod("POST");
            //获取URLConnection对象对应的输出流并开始发送参数
            out = new PrintWriter(conn.getOutputStream());
            //添加参数
            out.print(js.toString());
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(),"UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally {// 使用finally块来关闭输出流、输入流
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }