src/main/java/me/codeboy/common/base/io/util/CBFileUtil.java
public static void saveContentToFile(URL url, File file) throws IOException {
        InputStream is = url.openStream();
        FileOutputStream fos = new FileOutputStream(file);
        byte[] b = new byte[1024];
        int len;
        while ((len = is.read(b)) != -1) {
            fos.write(b, 0, len);
        }
        fos.flush();
        fos.close();
        is.close();
    }
public static void saveContentToFile(URL url, File file) throws IOException {
        InputStream is = url.openStream();
        FileOutputStream fos = new FileOutputStream(file);
        byte[] b = new byte[1024];
        int len;
        while ((len = is.read(b)) != -1) {
            fos.write(b, 0, len);
        }
        fos.flush();
        fos.close();
        is.close();
    }
保存网络文件到指定文件

@param url  文件地址
@param file 文件
@throws IOException io exception