httpURLConnection-網絡請求的兩種方式-get請求和post請求

GET請求

 

 /**
     * 從網絡獲取json數據,(String byte[})

     * @param path
     * @return
     */
    public static String getJsonByInternet(String path){
        try {
            URL url = new URL(path.trim());
            //打開連接
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

            if(200 == urlConnection.getResponseCode()){
                //得到輸入流
                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請求

 

//獲取其他頁面的數據
    /**
     * POST請求獲取數據
     */
    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);//連接超時 單位毫秒
            // conn.setReadTimeout(2000);//讀取超時 單位毫秒
            // 發送POST請求必須設置如下兩行
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            // 獲取URLConnection對象對應的輸出流
            PrintWriter printWriter = new PrintWriter(httpURLConnection.getOutputStream());
            // 發送請求參數
            printWriter.write(post);//post的參數 xx=xx&yy=yy
            // flush輸出流的緩沖
            printWriter.flush();
            //開始獲取數據
            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;
    }