java更改文件名

将files文件夹下的所有文件名后加个.zip的后缀。

代码如下：

import java.io.File;public class RenameFile {public static void main(String args[]) {File f = new File("/home/tom/test/files");if (f.exists()) {if (f.isDirectory()) {File[] files = f.listFiles();for (int i = 0; i < files.length; i++) {String oldname = files[i].getName();String newname = oldname.substring(0, oldname.length());newname = newname + ".zip";if (!oldname.equals(newname)) {String path = files[i].getParent();File newfile = new File(path + "/" + newname);if (newfile.exists()) {System.out.println(newname + "已经存在！");} else {files[i].renameTo(newfile);}}}}} else {System.out.println("File does not exist!");}}}