以下实例演示了如何获取远程文件的大小:
/* author by itshubao.com Main.java */ import java.net.URL; import java.net.URLConnection; public class Main { public static void main(String[] argv) throws Exception { int size; URL url = new URL("http://libs.itshubao.com/pic/small_001.jpg"); URLConnection conn = url.openConnection(); size = conn.getContentLength(); if (size < 0) System.out.println("无法获取文件大小。"); else System.out.println("文件大小为:" + + size + " bytes"); conn.getInputStream().close(); } }
以上代码运行输出结果为:
文件大小为:35862 bytes