Spring - jdbcTemplate无法获取Pair对象

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.apache.commons.lang3.tuple.Pair;

public class PairRowMapper implements RowMapper<Pair<String, Integer>> {
    @Override
    public Pair<String, Integer> mapRow(ResultSet rs, int rowNum) throws SQLException {
        String key = rs.getString("key_column");
        int value = rs.getInt("value_column");
        return Pair.of(key, value);
    }
}

public class ExampleDao {
    private JdbcTemplate jdbcTemplate;

    public Pair<String, Integer> getPairObject() {
        String sql = "SELECT key_column, value_column FROM your_table";
        return jdbcTemplate.queryForObject(sql, new PairRowMapper());
    }
}