Question

所以我试图让我的结果列在文本文件中，但是，它只需要最后一次输出并写入，猜测是由于重写它。我无法弄清楚如何阻止它，我认为这可能是重新打开文件写入每次的问题

     public static void jpg(File dir) throws UnsupportedEncodingException, FileNotFoundException, IOException
{
    String dataType = ".jpg";
    File listFile[] = dir.listFiles();
    if (listFile != null) 
    {
        for (int i=0; i<listFile.length; i++) 
        {
            if (listFile[i].isDirectory()) 
            {
                jpg(listFile[i]);
            } else 
            {
                if (listFile[i].getName().endsWith(dataType)) 
                {
                    System.out.println(listFile[i].getPath());
                    Path file = Paths.get(userInput,"");
                    BasicFileAttributes basicAttr = Files.readAttributes(file, BasicFileAttributes.class);
                    FileTime creationTime = basicAttr.creationTime();
                    FileTime lastAccessTime = basicAttr.lastAccessTime(); 
                    FileTime lastModifiedTime = basicAttr.lastModifiedTime();
                    System.out.println("    Creation Time: " + creationTime + " Last Access Time: " +lastAccessTime + " Last Modified Time: " +lastModifiedTime);

                    {
                        try (Writer writer = new BufferedWriter(new OutputStreamWriter(
                                new FileOutputStream("Results.txt"), "utf-8")))
                        {
                            writer.write(listFile[i].getPath());
                            writer.write("  Creation Time: " + creationTime + " Last Access Time: " +lastAccessTime + " Last Modified Time: " +lastModifiedTime);

                        }
                    }
                }
            }
        }
    }

}

Answer 1

您可以通过执行以下代码更改来解决此问题 -

new FileOutputStream（＆＃34; Results.txt＆＃34;，true）

                try (Writer writer = new BufferedWriter(new OutputStreamWriter(
                        new FileOutputStream("Results.txt",true), "utf-8")))
                {
                    writer.write(listFile[i].getPath());
                    writer.write("  Creation Time: " + creationTime + " Last Access Time: " +lastAccessTime + " Last Modified Time: " +lastModifiedTime);

                }

Answer 2

您需要在＆＃34;附加＆＃34;中打开文件。模式。

try (Writer writer = new BufferedWriter(new OutputStreamWriter(
        new FileOutputStream("Results.txt",true), "utf-8")))
{
    writer.write(listFile[i].getPath());
    writer.write("  Creation Time: " + creationTime + " Last Access Time: " +lastAccessTime + " Last Modified Time: " +lastModifiedTime + "\n");

}

请注意第二个write命令中的＆＃34; \ n＆＃34; 。它会在每次写入后添加换行符，使输出更具可读性。

您也可以尝试：

writer.write("  Creation Time: " + creationTime + " Last Access Time: " +lastAccessTime + " Last Modified Time: " +lastModifiedTime);
writer.newline();

writer.newline（）; 会添加换行符。

Reccursivley将我的输出写入文本文件

2 个答案: