Java從字節數組創建.docx文件

Question

我將.docx文件讀取為字節數組，但是當我嘗試再次將其保存為.docx文件時，該文件無法打開。

誰能解釋為什么？

public static void main(String[] args) throws IOException {
    byte[] data = readFile("test.docx");
    System.out.println(data.length);

    try (FileOutputStream fos = new FileOutputStream("testCopy.docx")) {
        fos.write(data);
    }
}

這是readFile方法

public static byte[] readFile(String filePath) throws FileNotFoundException, IOException {
    File file = new File(filePath);
    byte[] bytes = new byte[(int) file.length()];
    try (DataInputStream dataInputStream = new DataInputStream(new BufferedInputStream(new FileInputStream(filePath)))) {
        dataInputStream.readFully(bytes);
    }

    return bytes;
}

Answer 1

您可能應該研究一下DataInputStream和FileInputStream之間的區別。

嘗試使用FileInputStream代替DataInputStream並查看其工作方式。

try (FileInputStream fileInputStream = new FileInputStream(filePath)) {
            fileInputStream.read(bytes);
}