HttpURLconnection使用POST方式提交JSON数据给服务器

最原始的味道，使用HttpURLconnection提交JSON数据给后台服务器。此处留下标记。

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将javabean对象转换成Json字符串。通过HttpUrlconnection提交数据。getRequestCode返回415

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1.javabean转换成JSON字符串工具类。这里使用Gson解析器，请各位自行添加依赖包。

//将JSON字符串转换成javabean public static <T> T parsr(String json ,Class<T> tClass){ //判读字符串是否为空 if(TextUtils.isEmpty(json)){ return null; } if(gson==null){ gson = new Gson(); } return gson.fromJson(json,tClass); } //将javabean转换成JSON字符串 public static String converJavaBeanToJson(Object obj){ if(obj == null){ return ""; } if(gson == null){ gson = new Gson(); } String beanstr = gson.toJson(obj); if(!TextUtils.isEmpty(beanstr)){ return beanstr; } return ""; } HttpUrlconnection部分 //发送JSON字符串 如果成功则返回成功标识。 public static String doJsonPost(String urlPath, String Json) { // HttpClient 6.0被抛弃了 String result = ""; BufferedReader reader = null; try { URL url = new URL(urlPath); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("POST"); conn.setDoOutput(true); conn.setDoInput(true); conn.setUseCaches(false); conn.setRequestProperty("Connection", "Keep-Alive"); conn.setRequestProperty("Charset", "UTF-8"); // 设置文件类型: conn.setRequestProperty("Content-Type","application/json; charset=UTF-8"); // 设置接收类型否则返回415错误 //conn.setRequestProperty("accept","*/*")此处为暴力方法设置接受所有类型，以此来防范返回415; conn.setRequestProperty("accept","application/json"); // 往服务器里面发送数据 if (Json != null && !TextUtils.isEmpty(Json)) { byte[] writebytes = Json.getBytes(); // 设置文件长度 conn.setRequestProperty("Content-Length", String.valueOf(writebytes.length)); OutputStream outwritestream = conn.getOutputStream(); outwritestream.write(Json.getBytes()); outwritestream.flush(); outwritestream.close(); Log.d("hlhupload", "doJsonPost: conn"+conn.getResponseCode()); } if (conn.getResponseCode() == 200) { reader = new BufferedReader( new InputStreamReader(conn.getInputStream())); result = reader.readLine(); } } catch (Exception e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; }

亲测可行，亲们可以多试试。