java实现短地址服务的方法（附代码）

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;

@Pathpublic class IndexRoute {    // 盐值  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("没有找到");      return;    }    int id = (int) numbers[0];    String result = get(id).getUrl();    if (result == null) {      response.text("没有找到");      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", "无效的URL");      return resJsp;    }         Integer id = this.save(longUrl);    if (id == 0) {      request.attribute("error", "保存失败");      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 = "//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;  }}