单例模式模式下，不同的下载链接只下载第一个链接

参考如下代码： ` downloadVideoButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent actionEvent) {

            int index = list.getSelectedIndex();
            String name = nameList.get(index);

            String html = "https://" + nameListURL.get(index);
            System.out.println(html);

            String html1 = GetContent.getHtml(html);

            String videoUrl = GetContent.getVideoUrl(html1);
            System.out.println(videoUrl);

            File file = new File(name);
            if (!file.exists()) {
                file.mkdir();
            }
            String filePath = file.getAbsolutePath();

            M3u8DownloadFactory.M3u8Download m3u8Download = M3u8DownloadFactory.getInstance(videoUrl);
            m3u8Download.setDir(filePath);
            m3u8Download.setFileName(name);
            m3u8Download.setThreadCount(100);
            m3u8Download.setRetryCount(20);
            m3u8Download.setTimeoutMillisecond(10000L);
            m3u8Download.setLogLevel(Constant.DEBUG);
            m3u8Download.setInterval(500L);
            m3u8Download.addListener(new DownloadListener() {
                @Override
                public void start() {
                    System.out.println("开始下载！");
                    progressBar.setValue(0);
                }

                @Override
                public void process(String downloadUrl, int finished, int sum, float percent) {
                    System.out.println("下载网址：" + downloadUrl + "\t已下载" + finished + "个\t一共" + sum + "个\t已完成" + percent + "%");
                    progressBar.setValue((int) percent);
                }

                @Override
                public void speed(String speedPerSecond) {
                    System.out.println("下载速度：" + speedPerSecond);
                }

                @Override
                public void end() {
                    System.out.println("下载完毕");
                    progressBar.setString("Video download completed!");
                }
            });
            m3u8Download.start();
        }
    });`

改变 list 的值，每次点击 downloadVideoButton 应该产生不同的 videoUrl ，但是每次下载都是第一个 videoUrl （软件不关闭情况下）。

后来看到了工厂类的 getInstance() 方法： public static M3u8Download getInstance(String downloadUrl) { if (m3u8Download == null) { synchronized (M3u8Download.class) { if (m3u8Download == null) m3u8Download = new M3u8Download(downloadUrl); } } return m3u8Download; }

当第二次点击 downloadVideoButton 时，m3u8Download 不为null 直接 return 了，所以还是第一个的 videoUrl, 这就导致了每次下载只下载第一个链接。建议不要把 downloadUrl 放在getInstance()参数里，增加 set get 方法。

当初这么写是自己没事玩的。。。等我有时间重构下

---原始邮件--- 发件人: "Elliot @.> 发送时间: 2022年1月11日(周二) 中午12:32 收件人: @.>; 抄送: @.***>; 主题: [qq494257084/m3u8Download] 单例模式模式下，不同的下载链接只下载第一个链接 (Issue #12)

参考如下代码： downloadVideoButton.addActionListener(new ActionListener() { @OverRide public void actionPerformed(ActionEvent actionEvent) { int index = list.getSelectedIndex(); String name = nameList.get(index); String html = "https://" + nameListURL.get(index); System.out.println(html); String html1 = GetContent.getHtml(html); String videoUrl = GetContent.getVideoUrl(html1); System.out.println(videoUrl); File file = new File(name); if (!file.exists()) { file.mkdir(); } String filePath = file.getAbsolutePath(); M3u8DownloadFactory.M3u8Download m3u8Download = M3u8DownloadFactory.getInstance(videoUrl); m3u8Download.setDir(filePath); m3u8Download.setFileName(name); m3u8Download.setThreadCount(100); m3u8Download.setRetryCount(20); m3u8Download.setTimeoutMillisecond(10000L); m3u8Download.setLogLevel(Constant.DEBUG); m3u8Download.setInterval(500L); m3u8Download.addListener(new DownloadListener() { @Override public void start() { System.out.println("开始下载！"); progressBar.setValue(0); } @Override public void process(String downloadUrl, int finished, int sum, float percent) { System.out.println("下载网址：" + downloadUrl + "\t已下载" + finished + "个\t一共" + sum + "个\t已完成" + percent + "%"); progressBar.setValue((int) percent); } @Override public void speed(String speedPerSecond) { System.out.println("下载速度：" + speedPerSecond); } @Override public void end() { System.out.println("下载完毕"); progressBar.setString("Video download completed!"); } }); m3u8Download.start(); } });
改变 list 的值，每次点击 downloadVideoButton 应该产生不同的 videoUrl ，但是每次下载都是第一个 videoUrl （软件不关闭情况下）。

后来看到了工厂类的 getInstance() 方法： public static M3u8Download getInstance(String downloadUrl) { if (m3u8Download == null) { synchronized (M3u8Download.class) { if (m3u8Download == null) m3u8Download = new M3u8Download(downloadUrl); } } return m3u8Download; }

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qq494257084 / m3u8Download

单例模式模式下，不同的下载链接只下载第一个链接 #12