推荐1个下载别人csdn文章笔记的java项目：csdn-blog2markword-downloader
拿到别人的md笔记后，但是笔记中的图片又是以链接的格式给的，这个链接说不定后面就失效了，笔记也就看不到图片了。手动右键也可以保存图片，但是1个1个点太麻烦了，就练习一下正则的使用方法，把图片存下来。
一行一行的读取原来的md文档，每一行使用正则拿到匹配的图片链接，并保存到本地。
@Slf4j
public class TestReg {private static RestTemplate template = new RestTemplate();public static void main(String[] args) throws IOException {String filePath = "D:\\documents\\黑马rabbitmq\\mq基础\\MQ基础.md";File file = new File(filePath);// 创建同级目录下的assets文件夹File assetsFile = new File(file.getParent() + "\\assets");if (assetsFile.exists() || !assetsFile.isDirectory()) {assetsFile.mkdir();}RandomAccessFile raf = new RandomAccessFile(file.getParent() + "\\" + "_" + file.getName(), "rw");// 匹配图片链接所使用的正则// !\[.*?]\((https?:.*/(.*?\.(png|jpg|jpeg)))String imgLinkPattern = "!\\[.*?]\\((https?:.*/(.*?\\.(png|jpg|jpeg)))";Pattern p = Pattern.compile(imgLinkPattern);// Matcher matcher = p.matcher("11121");// System.out.println(matcher.find());// System.out.println(matcher.group(1)); // 文件名// String standardFormat = "";InputStreamReader reader = new InputStreamReader(new FileInputStream(file), StandardCharsets.UTF_8);BufferedReader bufReader = new BufferedReader(reader);String line = null;while ((line = bufReader.readLine()) != null) {Matcher matcher = p.matcher(line);if (matcher.find()) {String fileName = matcher.group(2);String imgUrl = matcher.group(1);String standardFileName = standardFormat.replaceAll("文件名", fileName);// System.out.println(imgUrl);// System.out.println(fileName);// System.out.println(standardFileName);saveImgToLocal(imgUrl, fileName, file.getParent());raf.write(standardFileName.getBytes(Charset.defaultCharset()));} else {raf.write(line.getBytes(Charset.defaultCharset()));}raf.write("\r\n".getBytes(Charset.defaultCharset()));}raf.close();}public static void saveImgToLocal(String imgUrl, String fileName, String dir) {log.info("获取图片, imgUrl: {}, fileName: {}, dir", imgUrl, fileName, dir);try {Resource resource = template.getForObject(imgUrl, Resource.class);FileOutputStream fos = new FileOutputStream(dir + "\\assets\\" + fileName);StreamUtils.copy(resource.getInputStream(), fos);fos.close();} catch (Exception e) {log.error("获取图片失败, imgUrl: {}, fileName: {}, dir", imgUrl, fileName, dir);}}}
)
的读写demo)
