将文件夹下的所有文件拷贝成`markdown`下的`code`

• 将文件夹下的所有文件拷贝成markdown下的code

   public boolean readDirFilesToMarkdown(String filePathDir, String distFileAbsolutePaths) throws Exception {
        File file = new File(filePathDir);
        File[] files = file.listFiles();
        Arrays.sort(files);
        StringBuffer stringBuffer = new StringBuffer();
        for (File fileItem : files) {
            if (fileItem.isFile()) {
                InputStreamReader reader = new InputStreamReader(new FileInputStream(fileItem));
                BufferedReader br = new BufferedReader(reader);
                String line = "";
                stringBuffer.append("//" + fileItem.getName() + "\r\n```java\r\n");
                boolean flag = false;
                while ((line = br.readLine()) != null) {
                    if (line != null && line.startsWith("package")) {
                        flag = true;
                    }

                    if (flag && line != null) {
                        stringBuffer.append(line + "\r\n");
                    }
                }
                stringBuffer.append("```\r\n");
                br.close();
            }
        }
        PrintStream ps = new PrintStream(new FileOutputStream(new File(distFileAbsolutePaths)));
        ps.println(stringBuffer.toString());
        ps.close();
        return true;
    }