HttpURLConnection.setRequestProperty的作用
设置http请求头
HttpURLConnection.setRequestProperty(String key,String value);
这个我居然都忘记了,哎~真是岁数大了,心好累。。。
例如:下面就是一个完整的原始网络请求方式
HttpURLConnection conn = null; try { URL my_url = new URL(log()); //得到connection对象。 conn = (HttpURLConnection) my_url.openConnection(); //允许写出 conn.setDoOutput(true); //允许读入 conn.setDoInput(true); //设置请求方式 conn.setRequestMethod("POST"); conn.setUseCaches(false); conn.setConnectTimeout(60 * 1000); conn.setReadTimeout(60 * 1000); //设置请求头 conn.setRequestProperty("Charsert", "UTF-8"); conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");//设置参数类型是json格式 conn.setRequestProperty("Connection", "Keep-Alive"); conn.setRequestProperty("logType", "base"); //连接网络。请求行,请求头的设置必须放在网络连接前 conn.connect(); BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(conn.getOutputStream(), "UTF-8")); writer.write(String.valueOf(hashMap)); writer.close(); //得到响应码 int responseCode = conn.getResponseCode(); MyLogcat.e("网络传输" + responseCode + "***" + conn.getResponseMessage() + String.valueOf(hashMap)); if (responseCode == 200) { //得到响应流 InputStream inputStream = conn.getInputStream(); //将响应流转换成字符串 String returnLine = getStringFromInputStream(inputStream); String str = "Success" + conn.getResponseCode() + "---" + conn.getResponseMessage() + "---" + returnLine; } else { String str = "Error" + conn.getResponseCode() + "---" + conn.getResponseMessage(); } } catch (Exception e) { e.printStackTrace(); } finally { if (conn != null) { conn.disconnect(); } } /** * 通过字节输入流返回一个字符串信息 */ private static String getStringFromInputStream(InputStream is) throws Exception { ByteArrayOutputStream baos = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = 0; while ((len = is.read(buffer)) != -1) { baos.write(buffer, 0, len); } is.close(); // 把流中的数据转换成字符串, 采用的编码是: utf-8 String status = baos.toString(); baos.close(); return status; }
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