java http請求url報錯505，但是瀏覽器可以正常返回json數據

有點郁悶的，不知道問題究竟在哪里。。。。

平時的請求都沒有問題，今天突然給我報錯了！我確信請求方法沒問題，在網上找了一堆，終於看到一個說參數里面有空格的，當我把參數里面的空格替換了之后，果然好了

get請求方法：這方法也是網上copy的，具體哪里忘了

  public static String sendGet(String url, String param) throws IOException
    {
        return sendGet(url, param, "utf-8");
    }

    public static String sendGet(String url, String param, String charSetName) throws IOException
    {
        String result = "";
        BufferedReader in = null;
        try
        {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打開和URL之間的連接
            URLConnection connection = realUrl.openConnection();
            // 設置通用的請求屬性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立實際的連接
            connection.connect();
            // 定義 BufferedReader輸入流來讀取URL的響應
            in = new BufferedReader(new InputStreamReader(connection.getInputStream(), charSetName));
            String line;
            while ((line = in.readLine()) != null)
            {
                result += line;
            }
        }
        finally
        {
            try
            {
                if (in != null)
                {
                    in.close();
                }
            }
            catch (Exception e2)
            {
                e2.printStackTrace();
            }
        }
        return result;
    }

    public static String sendPost(String url, String param) throws IOException
    {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try
        {
            URL realUrl = new URL(url);
            // 打開和URL之間的連接
            URLConnection conn = realUrl.openConnection();
            // 設置通用的請求屬性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 發送POST請求必須設置如下兩行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 獲取URLConnection對象對應的輸出流
            out = new PrintWriter(conn.getOutputStream());
            // 發送請求參數
            out.print(param);
            // flush輸出流的緩沖
            out.flush();
            // 定義BufferedReader輸入流來讀取URL的響應
            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null)
            {
                result += line;
            }
        }
        finally
        {
            try
            {
                if (out != null)
                {
                    out.close();
                }
                if (in != null)
                {
                    in.close();
                }
            }
            catch (IOException ex)
            {
                ex.printStackTrace();
            }
        }
        return result;
    }

參數里面就因為name參數有空格

然后把所有name里面的空格轉換一下再次請求就OK了

name.replaceAll("\\+","%20")