递归读取某目录下文件，并写入txt

某目录下有大量文件，且目录层级不限，需要提取文件信息，利用递归读取即可。

    public static void folderMethod(String path) {
        File file = new File(path);
        if (file.exists()) {
            File[] files = file.listFiles();
            if (null != files) {
                for (File file2 : files) {
                    if (file2.isDirectory()) {
                        folderMethod(file2.getAbsolutePath());
                    } else {
                        System.out.print("文件完整路径:" + file2.getAbsolutePath());
                        System.out.print("文件目录:" + file2.getParent());
                        System.out.println("文件名称:" + file2.getName());
                        
                        makeFileRecord(file2.getAbsolutePath()+"|"+file2.getParent()+"|"+file2.getName());
                    }
                }
            }
        } else {
            System.out.println("文件不存在!");
        }
    }
    
    private static void makeFileRecord(String content) {
        BufferedWriter ous = null;
        try {
            File file = new File("/root/record.txt");//读取结果存入 txt
            if(!file.exists()) {
                file.createNewFile();
            }
          //  FileWriter(file,true)  true  指定是以追加的方式读写。
            ous = new BufferedWriter(new FileWriter(file, true));
            ous.write(content);            
            ous.newLine();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                ous.flush();
                ous.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    
    public static void main(String[] args) {
        folderMethod("/home/sse/RECOVERED_FILES/opt/apache-tomcat-7.0.57/webapps/EFRS/upload");
    }