java - 使用 JFileChooser 保存文件

Question

我想将文件保存到用户从一个目录中选择的另一个目录。我知道 JFileChooser 可用于选择文件。但是，除了使用任何输出流之类的东西之外，还有什么方法可以在 Java 中将文件从一个位置移动到另一个位置吗？

Answer 1

只有且仅当它们位于相同本地磁盘文件系统上时，您才可以使用 File#renameTo()为此。

File sourceFile = createItSomehow();
File targetFile = chooser.getSelectedFile();

boolean renamed = sourceFile.renameTo(targetFile);

if (!renamed) {
    // Well, perhaps they are not on the same disk?
}

对于所有其他情况，通过流式传输确实会更好。另请参阅链接的 javadoc:

Many aspects of the behavior of this method are inherently platform-dependent: The rename operation might not be able to move a file from one filesystem to another, it might not be atomic, and it might not succeed if a file with the destination abstract pathname already exists. The return value should always be checked to make sure that the rename operation was successful.