一、POST传值方法
public static String SendUlr(String requestUrl,String xml) { ???String responseStr=""; ??????try { ??????????URL url = new URL(requestUrl); ??????????HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection(); ??????????urlConnection.setDoOutput(true); ??????????urlConnection.setDoInput(true); ??????????urlConnection.setRequestMethod("POST"); ??????????urlConnection.setUseCaches(false); ???????????urlConnection.setInstanceFollowRedirects(true); ??????????urlConnection.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); ??????????urlConnection.setRequestProperty("Charset", "UTF-8"); ???????????urlConnection.connect(); ??????????DataOutputStream out = new DataOutputStream(urlConnection.getOutputStream()); ??????????String params= xml; ?????????????????out.write(params.getBytes("UTF-8")); ????????/* ?out.writeBytes(params);*/ ??????????out.flush(); ??????????out.close(); ???????????BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(),"UTF-8")); ??????????String line; ??????????while ((line = reader.readLine()) != null){ ??????????????responseStr+=line; ??????????} ??????????reader.close(); ??????????urlConnection.disconnect(); ??????}catch (MalformedURLException e) { ??????????// TODO Auto-generated catch block ??????????e.printStackTrace(); ??????} catch (ProtocolException e) { ??????????// TODO Auto-generated catch block ??????????e.printStackTrace(); ??????} catch (IOException e) { ??????????// TODO Auto-generated catch block ??????????e.printStackTrace(); ??????} ??????return responseStr; ??}二、接口访问，返回json对象
PS://{"stu":"11","stuName":"w","sex":"男"}String url = "http://localhost:8080/yikang/q/yikang/YtxHaixun/test";String par = "a="+"123";String str = YikangUtil.SendUlr(url, par);JSONObject jsonp = JSON.parseObject(str);System.out.println(jsonp.get("id"));三、接口访问，返回json集合
//PS:[{"stu":"11","stuName":"w","sex":"男"}, ???????????????{"stu":"11","stuName":"w","sex":"男"}, ???????????????{"stu":"11","stuName":"w","sex":"男"}]String url = "http://localhost:8080/yikang/q/yikang/YtxHaixun/test";String par = "a="+"123";String str = YikangUtil.SendUlr(url, par);JSONArray parseArray = JSONArray.parseArray(str);int size = parseArray.size();for(int i=0;i<size;i++){ String id = (String)parseArray.getJSONObject(i).get("id"); System.out.println("==="+id);} ???????????
Json传值
原文地址：https://www.cnblogs.com/superxff/p/9220952.html