[工具库]JFileDownloader工具类——多线程下载网络文件，并保存在本地

 1 String urlPath = "http://localhost:8080/firstserver/files/test.zip";
 2 String destFilePath = "C:\\Users\\admin\\Desktop\\杂\\临时仓库\\test.zip";
 3 int threadCount = 3;
 4 
 5 JFileDownloader downloader = new JFileDownloader(urlPath, destFilePath, threadCount);
 6 //或者：
 7 JFileDownloader downloader = new JFileDownloader()
 8             .setUrlPath(urlPath)
 9             .setDestFilePath(destFilePath)
10             .setThreadCount(threadCount)
11             .setFileDownloadListener(new JFileDownloadListener() { // 设置进度监听器
12                     public void downloadProgress(int progress, double speed, long remainTime) {
13                         System.out.println("文件已下载：" + progress + "%，下载速度为：" + speed + "kb/s，剩余所需时间：" + remainTime + "毫秒");
14                     }
15                     public void downloadCompleted(File file, long downloadTime) {
16                         System.out.println("文件：" + file.getName() + "下载完成，用时：" + downloadTime + "毫秒");
17                     }
18             });
19     try {
20         downloader.startDownload(); // 开始下载
21     } catch (Exception e) {
22         e.printStackTrace();
23     }