如何根据号码安排和重命名文件？(How to arrange and rename files according to number?)

如何根据号码安排和重命名文件？(How to arrange and rename files according to number?)

我想先排列文件，然后根据文件名中的数字指定的顺序重命名。

例如：

我有一个包含一堆不同文件的文件夹。 文件名由末尾的数字表示。 假设我们在该文件夹中有以下文件：

file_1.xml // Remains unchanged file_2.xml // Remains unchanged file_4.xml // Should be renamed to "file_3.xml" file_9.xml // Should be renamed to "file_4.xml" file_12.xml // Should be renamed to "file_5.xml"

我怎么做？ 我想创建一个可靠的干净方法，按顺序重命名文件。

至今：

private void updateFilesName() { for (int i = 1; i <= filesAmount; i++) { File file1 = new File(getFilesDir().getParent() + "/file_" + i + ".xml"); File file2 = new File(getFilesDir().getParent() + "/file_" + String.valueOf(i + 1) + ".xml"); if (!file1.exists() && file2.exists()) { file2.renameTo(file1); } } }

但这只适用于2个文件位置之间的差异为1.（如file_2和file_4之间）此方法不适用于file_9和file_12 。

I want to arrange files first and rename them according to their order that is specified by a number in the file name.

For example:

I have a folder that contains a bunch of different files. The file names are indicated by a number at the end of it. Let's say we have the following files in that folder:

file_1.xml // Remains unchanged file_2.xml // Remains unchanged file_4.xml // Should be renamed to "file_3.xml" file_9.xml // Should be renamed to "file_4.xml" file_12.xml // Should be renamed to "file_5.xml"

How do I do that? I want to create a reliable clean method that renames files in order.

So far:

private void updateFilesName() { for (int i = 1; i <= filesAmount; i++) { File file1 = new File(getFilesDir().getParent() + "/file_" + i + ".xml"); File file2 = new File(getFilesDir().getParent() + "/file_" + String.valueOf(i + 1) + ".xml"); if (!file1.exists() && file2.exists()) { file2.renameTo(file1); } } }

But that only works if the difference between 2 file positions was 1. (like between file_2 and file_4) This method won't work for file_9 and file_12.

最满意答案

private void updateFilesName() { int j; for (int i = 1; i <= filesAmount; i++) { File file1 = new File(getFilesDir().getParent() + "/file_" + i + ".xml"); if (!file1.exists()) { j = i+1; while (!(new File(getFilesDir().getParent() + "/file_" + j + ".xml")).exists()) { j++; } (new File(getFilesDir().getParent() + "/file_" + j + ".xml")).renameTo(file1); } } } private void updateFilesName() { int j; for (int i = 1; i <= filesAmount; i++) { File file1 = new File(getFilesDir().getParent() + "/file_" + i + ".xml"); if (!file1.exists()) { j = i+1; while (!(new File(getFilesDir().getParent() + "/file_" + j + ".xml")).exists()) { j++; } (new File(getFilesDir().getParent() + "/file_" + j + ".xml")).renameTo(file1); } } }