JdbcCursorItemReader必须关闭连接吗？

@Bean
public JdbcCursorItemReader<MyDataObject> jdbcCursorItemReader(DataSource dataSource) {
    JdbcCursorItemReader<MyDataObject> reader = new JdbcCursorItemReader<>();
    reader.setDataSource(dataSource);
    reader.setSql("SELECT * FROM my_table");
    reader.setRowMapper(new MyDataObjectRowMapper());

    // 设置ItemReaderListener
    reader.setListener(new ItemReaderListener<MyDataObject>() {
        @Override
        public void beforeRead() throws Exception {
            // 关闭连接
            dataSource.getConnection().close();
        }

        @Override
        public void afterRead(MyDataObject item) throws Exception {
            // 重新打开连接
            dataSource.getConnection().open();
        }

        @Override
        public void onReadError(Exception ex) throws Exception {
            // 处理读取异常
        }
    });

    return reader;
}