import org.junit.Test;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

public class TestFileSize {

    @Test

    public void getSize() throws IOException {

        Path file = Paths.get("F:\\logs\\spider.log");

        long length = Files.size(file);

        System.out.printf("文件大小:%d byte",length);

    }

}