Using Guid/uuid to generate token and verify the correctness of token

There would have been a powerful tool for generating token validation JWT, but sometimes taking into account the actual requirements of the project, Guid/uuid will be used to generate token, of course, Guid/uuid can generate a lot of unique validation results, so here is the main record of the use of Guid/uuid

public string createtkn (string account,string pin,string imei) {
         Savetodb st = new Savetodb ();
         Create GUID object
          uuid uuid = Uuid.randomuuid ();
          Get the object generated ID
          String token = uuid.tostring ();
          Convert to uppercase
          token = Token.touppercase ();
          Replace "-" into space
          token = Token.replaceall ("-", "");
          SYSTEM.OUT.PRINTLN (token);
          Save token and user information to the database
          map<string, object> params = new hashmap<> ();
          Params.put ("St_sid", token);
          Params.put ("St_account", account);
          String tablename = "table name";
          Here is a mybaits method to save data to the database, specifically http://blog.csdn.net/suresand/article/details/52540684
          st.save (tablename, params);
          Save the next time you can use the user's token in the database to do a validation return
          "token";
    

/** * Verify that the user's token value is correct * @param account * @param tokenvalue * @return correct--1, error
          --0 */public string checktkn (string account, String tokenvalue) {Savetodb st = new Savetodb ();
          Map<string, object> params=new hashmap<> ();
          Query the database to see if the user's token exists params.put ("St_sid", Tokenvalue);
          String tablename = "T_hy_logintkn_i";
          Use a list set to accept the map collection, so you need to convert the list rs = new arraylist<> () later;
          The same mybaits Query method rs = st.select (tablename, params);
          Map<string, object> map=new hashmap<> ();
          Map = (map<string, object>) rs.get (0);
          Check if the token belongs to the user if (Account.equals (Map.get ("St_account"). ToString ()) {return "1";
          }else{return "0"; }
    }