JAVA——将一个文件复制到另一个目录下

例如：将图片timg.jpg从D:/tupian目录，复制到D:/images目录，复制后的名称改为了timg2.jpg

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;

public class aaa {
    public static void main(String[] args) throws IOException {
        String oldpath = "D:/tupian/timg.jpg";
        String newpath = "D:/images/timg2.jpg";
        copy(oldpath, newpath);
    }

    private static void copy(String oldpath, String newpath) throws IOException {
        File oldpaths = new File(oldpath);
        File newpaths = new File(newpath);
        if (!newpaths.exists()) {
            Files.copy(oldpaths.toPath(), newpaths.toPath());
        } else {
            newpaths.delete();
            Files.copy(oldpaths.toPath(), newpaths.toPath());
        }
    }
}