public void registrasiUser(@WebParam(name = "nama") String nama, @WebParam(name = "golonganDarah") String golonganDarah, @WebParam(name = "usia") int usia) {
        //TODO write your implementation code here:
        con = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            con = DriverManager.getConnection("jdbc:mysql://localhost:3306/160415030pendonor1","root","mysql");
            stat = (Statement) con.createStatement();
            if(!con.isClosed())
            {
                PreparedStatement sql = (PreparedStatement) con.prepareStatement("INSERT into user(nama,golongan_darah,usia)values(?,?,?)");
                sql.setString(1, nama);
                sql.setString(2, golonganDarah);
                sql.setInt(3, usia);
                sql.executeUpdate();

            }
        } catch (Exception e) {
        }
    }