Java 文件复制 - 如何备份/复制输入文件到其他目标位置？

Question

在执行任何任务之前想要将文件复制/备份到目标文件夹。(jdk-1.7) /*Input file path taken from properties file as string is :inputFilewhere-in inputFile is :C:\\Project\\input\\filename.txtDestination file path taken from properties file as string is : archiveFolderPath */  //Existing code : in mainif (inputFile != null) {readTextFile(new File(inputFile)); }// in readTextFile methodBufferedReader br = new BufferedReader(new FileReader(filename));我尝试使用以下过程：：但出现错误：错误：：文件类型中的方法复制（InputStream，OutputStream）不适用于参数（字符串，字符串）//Calling method in main::copyFiles(inputFile, archiveFolderPath);//Copy method :private static void copyFiles (String inputFile, String   archiveFolderPath) throws IOException {    Files.copy(inputFile, archiveFolderPath); }请建议替代解决方案，如“文件不适用于参数（字符串，字符串）”。

Answer 1

您可以在对文件执行读取或写入操作之前复制该文件。例子：-

Path origin = Paths.get("/home/fm/source.txt");

Path destination = Paths.get("/home/fm/source.bak");

//Copy source.txt to source.bak

Files.copy(origin, destination, StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING);

Files有关所有方法的详细信息，请参阅javadoc copy。他们中的一些人期待CopyOption着争论。CopyOption根据节目要求选择合适的。

https://docs.oracle.com/javase/7/docs/api/java/nio/file/Files.html https://docs.oracle.com/javase/7/docs/api/java/nio/file/StandardCopyOption.html#COPY_ATTRIBUTES