代码如下
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); }}