java 如何在java中复制粘贴和剪切粘贴文件或文件夹？

How to copy-paste, and cut-paste file or folder in java?

提问by Jay

I made a desktop app in java with netbeans platform. In my app I want to give separate copy-paste and cut-paste option of file or folder.

我用 netbeans 平台用 java 制作了一个桌面应用程序。在我的应用程序中，我想为文件或文件夹提供单独的复制粘贴和剪切粘贴选项。

So how can I do that? I tried Files.copy(new File("D:\\Pndat").toPath(),new File("D:\\212").toPath(), REPLACE_EXISTING);. But I don't get the exact output.

那我该怎么做呢？我试过了Files.copy(new File("D:\\Pndat").toPath(),new File("D:\\212").toPath(), REPLACE_EXISTING);。但我没有得到确切的输出。

If there any other option then suggest me.

如果还有其他选择，请建议我。

回答by Alya'a Gamal

In case of "cut-paste" you can use renameTo()like this:

在“剪切粘贴”的情况下，您可以renameTo()像这样使用：

File source = new File("////////Source path");
File destination = new File("//////////destination path");

if (!destination.exists()) {
    source.renameTo(destination);
}

In case of "copy-paste" you need to read in Input and Output stream.

在“复制粘贴”的情况下，您需要读取输入和输出流。

回答by vels4j

Use FileUtilsfrom apache io and do FileUtils.copyDirectory(sourceDir, destDir);

使用文件实用程序从Apache的IO和做FileUtils.copyDirectory(sourceDir, destDir);

You can also do the following file operations

还可以进行以下文件操作

• writing to a file
• reading from a file
• make a directory including parent directories
• copying files and directories
• deleting files and directories
• converting to and from a URL
• listing files and directories by filter and extension
• comparing file content
• file last changed date

• 写入文件
• 从文件中读取
• 创建一个包含父目录的目录
• 复制文件和目录
• 删除文件和目录
• 与 URL 相互转换
• 按过滤器和扩展名列出文件和目录
• 比较文件内容
• 文件上次更改日期

Download linkfor apache i/o jar.

apache i/o jar 的下载链接。

回答by Java42

I think this question relates to using the system clipboard for copying a file specified in a Java app and using the OS "Paste" function to copy the file to a folder. Here is a short instructional example that will show you how to add a single file to the OS clipboard for later doing an OS "Paste" function. Tweak as necessary and add error/exception checking as needed.

我认为这个问题与使用系统剪贴板复制 Java 应用程序中指定的文件以及使用操作系统“粘贴”功能将文件复制到文件夹有关。这是一个简短的说明示例，将向您展示如何将单个文件添加到操作系统剪贴板，以便稍后执行操作系统“粘贴”功能。根据需要进行调整并根据需要添加错误/异常检查。

As a secondary, this code also places the file name on the clipboard so you can paste the file name into document editors.

作为辅助，此代码还将文件名放在剪贴板上，以便您可以将文件名粘贴到文档编辑器中。

package com.example.charles.clipboard;

import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;

public class JavaToSystemClipboard {

public static void main(final String[] args) throws Exception {
    final File fileOut = new File("someFileThatExists");
    putFileToSystemClipboard(fileOut);

}

public static void putFileToSystemClipboard(final File fileOut) throws Exception {
    final Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
    final ClipboardOwner clipboardOwner = null;

    final Transferable transferable = new Transferable() {
        public boolean isDataFlavorSupported(final DataFlavor flavor) {
            return false;
        }
        public DataFlavor[] getTransferDataFlavors() {
            return new DataFlavor[] { DataFlavor.javaFileListFlavor, DataFlavor.stringFlavor };
        }
        public Object getTransferData(final DataFlavor flavor) {
            if (flavor.equals(DataFlavor.javaFileListFlavor)) {
                final List<String> list = new ArrayList<>();
                list.add(fileOut.getAbsolutePath());
                return list;
            }
            if (flavor.equals(DataFlavor.stringFlavor)) {
                return fileOut.getAbsolutePath();
            }
            return null;
        }
    };
    clipboard.setContents(transferable, clipboardOwner);
}
}

回答by Abraham

You can write things by yourself using FileOutputStreamand FileInputStreamor you can used Apache Camel.

您可以使用FileOutputStream和FileInputStream自己编写东西，也可以使用Apache Camel。