httpURLConnection-网络请求的两种方式-get请求和post请求
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GET请求
/** * 从网络获取json数据,(String byte[})
* @param path * @return */ public static String getJsonByInternet(String path){ try { URL url = new URL(path.trim()); //打开连接 HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); if(200 == urlConnection.getResponseCode()){ //得到输入流 InputStream is =urlConnection.getInputStream(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = 0; while(-1 != (len = is.read(buffer))){ baos.write(buffer,0,len); baos.flush(); } return baos.toString("utf-8"); } } catch (IOException e) { e.printStackTrace(); } return null; }
POST请求
//获取其他页面的数据 /** * POST请求获取数据 */ public static String postDownloadJson(String path,String post){ URL url = null; try { url = new URL(path); HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setRequestMethod("POST");// 提交模式 // conn.setConnectTimeout(10000);//连接超时 单位毫秒 // conn.setReadTimeout(2000);//读取超时 单位毫秒 // 发送POST请求必须设置如下两行 httpURLConnection.setDoOutput(true); httpURLConnection.setDoInput(true); // 获取URLConnection对象对应的输出流 PrintWriter printWriter = new PrintWriter(httpURLConnection.getOutputStream()); // 发送请求参数 printWriter.write(post);//post的参数 xx=xx&yy=yy // flush输出流的缓冲 printWriter.flush(); //开始获取数据 BufferedInputStream bis = new BufferedInputStream(httpURLConnection.getInputStream()); ByteArrayOutputStream bos = new ByteArrayOutputStream(); int len; byte[] arr = new byte[1024]; while((len=bis.read(arr))!= -1){ bos.write(arr,0,len); bos.flush(); } bos.close(); return bos.toString("utf-8"); } catch (Exception e) { e.printStackTrace(); } return null; }
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