HTTP使用get，post方式鏈接

在項目中使用了http的get和post方式鏈接，發送傳輸數據；

public static String doGet(String httpUrl) {
        HttpURLConnection conn = null;
        InputStream is = null;
        BufferedReader br = null;
        String result = null;
        try {
            //建立遠程url連接
            URL url = new URL(httpUrl);
            //經過遠程URL鏈接對象打開一個鏈接
            conn = (HttpURLConnection) url.openConnection();
            //設置鏈接方式爲get
            conn.setRequestMethod("GET");
            //設置鏈接主機服務器的超時時間
            conn.setConnectTimeout(15000);
            //設置讀取遠程返回的數據時間
            conn.setReadTimeout(60000);
            //發送請求
            conn.connect();
            //經過鏈接，獲取輸入流
            if(conn.getResponseCode() == 200) {
                is = conn.getInputStream();
                //封裝輸入流is，並指定字符集
                br = new BufferedReader(new InputStreamReader(is,"UTF-8"));
                //存放數據
                StringBuffer sbf = new StringBuffer();
                String temp = null;
                while((temp = br.readLine()) != null) {
                    sbf.append(temp);
                }
                result = sbf.toString();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            close(conn,is,null,br);
        }
        return result;
    }
    
    public static String doPost(String httpUrl,String param) {
        HttpURLConnection conn = null;
        InputStream is = null;
        OutputStream os = null;
        BufferedReader br = null;
        String result = null;
        try {
            //建立遠程url連接
            URL url = new URL(httpUrl);
            //經過遠程URL鏈接對象打開一個鏈接
            conn = (HttpURLConnection) url.openConnection();
            //設置鏈接方式爲get
            conn.setRequestMethod("POST");
            //設置鏈接主機服務器的超時時間
            conn.setConnectTimeout(15000);
            //設置讀取遠程返回的數據時間
            conn.setReadTimeout(60000);
            
            //默認設置爲false，當向遠程服務器傳輸/寫數據
            conn.setDoInput(true);
            //默認設置爲true，當前向遠程服務器時，設置爲true，該參數無關緊要
            conn.setDoOutput(true);
            //設置傳入參數的格式：請求參數應該是name1 = value1，name2 = value2的形式
            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            //經過鏈接對象獲取一個輸出流
            os = conn.getOutputStream();
            //經過輸出流對象將數據寫出去
            os.write(param.getBytes("UTF-8"));
            //經過鏈接，獲取輸入流
            if(conn.getResponseCode() == 200) {
                is = conn.getInputStream();
                //封裝輸入流is，並指定字符集
                br = new BufferedReader(new InputStreamReader(is,"UTF-8"));
                //存放數據
                StringBuffer sbf = new StringBuffer();
                String temp = null;
                while((temp = br.readLine()) != null) {
                    sbf.append(temp);
                }
                result = sbf.toString();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            close(conn,is,null,br);
        }
        return result;
    }