Question

我真的坚持这个问题并希望得到一些帮助。我自动登录到服务器并下载Excel（xlsx）文件。下载似乎工作正常，因为大小与服务器上的相同，如果我用XML-Editor打开文件，它看起来有效（与其他excel文件相比）。但是如果我尝试用excel打开下载的文件，我得到了一个＆＃34;该文件可能已损坏＆＃34;消息，它不可读。

我尝试更改文件的编码，即GET-Request的标头，甚至尝试将其编写为Bytestream。没有改变。

以下是一些相关的代码段：

public HttpsURLConnection login()
{
    HttpsURLConnection connection = null;

    String user = "user";
    String password = "password";    

    String authString = user + ":" + password;

    byte[] authEncBytes = Base64.encodeBase64(authString.getBytes());
    String authStringEnc = new String(authEncBytes);


    try {
        connection = (HttpsURLConnection)url.openConnection();

    connection.setRequestMethod("GET");
    connection.setRequestProperty("Authorization", "Basic " + authStringEnc);  
    connection.setRequestProperty("Content-Type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
    //connection.setRequestProperty("Content-Type", "application/vnd.openxml");
    connection.setRequestProperty("Accept", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
    //connection.setRequestProperty("Accept", "application/vnd.openxml");
    connection.setRequestProperty("User-Agent", USER_AGENT);

    connection.connect();
    } catch (IOException e) 
    {
        e.printStackTrace();
    }

    return connection;
}

下载课程

private void sendGet(HttpsURLConnection con) throws Exception {


    int responseCode = con.getResponseCode();
    System.out.println("\nSending 'GET' request to URL : " + url);
    System.out.println("Response Code : " + responseCode);

    BufferedReader in = new BufferedReader(
            new InputStreamReader(con.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();

    String fileName = "test.xlsx";
    file = new File(fileName);
    if (!file.exists()) {
    file.createNewFile();
    }
    //use FileWriter to write file
    FileWriter fw = new FileWriter(file.getAbsoluteFile());
    //BufferedWriter bw = new BufferedWriter(fw);

    /**CharsetEncoder encoder = Charset.forName("UTF-8").newEncoder();
    encoder.onMalformedInput(CodingErrorAction.REPORT);
    encoder.onUnmappableCharacter(CodingErrorAction.REPORT);**/
    BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
            new FileOutputStream(fileName), "UTF-8"
        ));

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
        bw.write(inputLine);
    }
    in.close();
    bw.close();


    //print result
    //System.out.println(response.toString());

}

您可以在某些注释行中看到我的尝试。

我感谢任何帮助。提前谢谢。

使用Java下载的Excel文件不可读

0 个答案: