使用url字符串下载文件

import java.net.URL;

其实都是靠这个包吧，该有的方法都封装好了，到时候研究一下

 

这个拿来就用

    public static void download(String xString) throws IOException {
        long beginData = System.currentTimeMillis();
        URL partUrl = new URL(xString);
        HttpURLConnection urlConn = (HttpURLConnection) partUrl.openConnection();
        urlConn.setReadTimeout(10000 * 10000);
        urlConn.setConnectTimeout(10000 * 10000);

        String nameString = xString.substring(xString.lastIndexOf("/") + 1, xString.length());

        //指定文件下载目录
//        String path = xString.replace("https://repo1.maven.org/maven2/", "D:\\org\\");
//        String pathFile = path.replace(nameString, "").replaceAll("\\\\", "//");
//        new File("E:/00WYY/task3grabInformation/download").mkdirs();

        File file = new File("E:/00WYY/task3grabInformation/download/"+nameString);
        InputStream is = urlConn.getInputStream();
        BufferedInputStream bis = new BufferedInputStream(is);
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));

        System.out.println("开始下载" + xString);
        int len = 0;
        while ((len = bis.read()) != -1) {
            bos.write(len);
        }
        System.out.println("下载耗时 "+(System.currentTimeMillis()-beginData)+"毫秒");
        bis.close();
        bos.close();
    }

 

这个博客还没看，感觉有用

Java IO教程 --- Java 下载URL到文件中 (hicxy.com)