//this line added to HttpSecurity object
.and().rememberMe().rememberMeParameter("rememberMe")
.tokenRepository(persistentTokenRepository())
.tokenValiditySeconds(86400)

@Bean
public DataSource getDataSource() {
    DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create();
    dataSourceBuilder.driverClassName("${db.driver}");
    dataSourceBuilder.url("${db.url}");
    dataSourceBuilder.username("${db.username}");
    dataSourceBuilder.password("${db.password}");
    return dataSourceBuilder.build();
}

@Bean
public PersistentTokenRepository persistentTokenRepository() {
    JdbcTokenRepositoryImpl jdbcTokenRepository = new JdbcTokenRepositoryImpl();
    jdbcTokenRepository.setDataSource(getDataSource());
    return jdbcTokenRepository;
}