java實現短地址服務的方法（附代碼）

2019-11-26 15:03:08

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來源：轉載

供稿：網友

假設下面是你的視頻網站鏈接列表，如果別人想爬取你的數據十分輕松，看規則就知道數據庫是序列自增的

http://www.xxxx.com/video/1
http://www.xxxx.com/video/2
http://www.xxxx.com/video/3

那么解決這一問題，我們可以使用短地址，不對外暴露真實鏈接，使用對稱加密是一個很好的方案。

Hashids是一個很好的選擇，它提供了JS/PHP/JAVA/PYTHON等編程語言的實現，這里我使用的就是它。

下面是我基于blade框架搭建的java短地址服務。

CREATE TABLE `t_url` ( `id` int(10) NOT NULL AUTO_INCREMENT, `url` text NOT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8;

路由

@Pathpublic class IndexRoute {    // 鹽值  private static final Hashids HASHIDS = new Hashids("blade-shorturl");     private UrlModel urlModel = new UrlModel();   @Route("/:key")  public void get(Request req, Response response) {    String key = req.pathParam(":key").replaceAll("[^A-Za-z0-9]", "");    long[] numbers = HASHIDS.decode(key);     if (null == numbers || numbers.length < 1) {      response.text("沒有找到");      return;    }    int id = (int) numbers[0];    String result = get(id).getUrl();    if (result == null) {      response.text("沒有找到");      return;    }    response.redirect(result);  }     @Route(value = "/", method = HttpMethod.GET)  public String index() {    return "index";  }     @Route(value = "/", method = HttpMethod.POST)  public String save(Request request, Response response) {    String resJsp = "index";         String longUrl = request.query("url");         if (!isURL(longUrl)) {      request.attribute("error", "無效的URL");      return resJsp;    }         Integer id = this.save(longUrl);    if (id == 0) {      request.attribute("error", "保存失敗");      return resJsp;    }         String hash = HASHIDS.encode(id);    request.attribute("url_hash", hash);         System.out.println("id = " + id + ",url_hash=" + hash);         return resJsp;  }   private Integer save(String url) {    return urlModel.insert().param("url", url).executeAndCommit();  }     private UrlModel get(int id) {    return urlModel.fetchByPk(id);  }     private final String REGEX = "http://b(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]";     private boolean isURL(String url) {    if(StringKit.isNotBlank(url)){      Pattern pattern = Pattern.compile(REGEX);      Matcher matcher = pattern.matcher(url);      if (matcher.find()) {        return true;      }    }    return false;  }}

實現效果：