spring orm

public int add(T entity){ 
    SqlParameterSource param = new BeanPropertySqlParameterSource(entity); 
    if(insertActor.getTableName()==null){ 
        insertActor.setTableName(table); 
    } 
       return insertActor.execute(param); 
} 
public T getById(int id){ 
    String sql = "select * from "+table+" where id = ?"; 
    logger.info("{}",sql); 
    RowMapper<T> mapper = (RowMapper<T>) ParameterizedBeanPropertyRowMapper.newInstance(entityClass); 
    return simpleJdbcTemplate.queryForObject(sql, mapper, id); 
}