批量配置无效。问题是什么？

Question

上面代码中的问题是什么？ 我需要更改以使代码成功运行。 我需要改变什么

$sql = "SELECT *
FROM `characteritem` 
INNER JOIN item ON characteritem.iid=item.iid
WHERE `owner` = '$user'";
$result = $db_conn->query($sql);
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        $iid = $row['characteritem.iid'];
        $quantity = $row['quantity'];
        $itemweight = $row['itemweight'];

        $itemtotal = $itemweight * $quantity;
        echo $itemtotal;
    }
}

部分日志输出：

@Configuration
@EnableBatchProcessing
public class BatchConfiguration 
{
    @Autowired
    private JobBuilderFactory jobBuilderFactory;

    @Autowired
    private StepBuilderFactory stepBuilderFactory;

    @Autowired
    private DataSource dataSource;

    @Bean
    public DataSource dataSource()
    {
        System.out.println("here1");
        final DriverManagerDataSource dataSource =new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/ssk");
        dataSource.setUsername("root");
        dataSource.setPassword("hardik0000007");
        return dataSource;
    }


    @Bean
    public FlatFileItemReader<people> reader()
    {
        System.out.println("here2");
        FlatFileItemReader<people> reader =new FlatFileItemReader<people>();
        reader.setResource(new ClassPathResource("employeeData.csv"));
        reader.setLineMapper(new DefaultLineMapper<people>(){{
            setLineTokenizer(new DelimitedLineTokenizer(){{
                setNames(new String[]{"fname","lname"});
            }});
            setFieldSetMapper(new BeanWrapperFieldSetMapper<people>(){{
                setTargetType(people.class);
            }});
        }});

        return reader;
    }

    @Bean
    public UserItemProcessor processor()
    {
        System.out.println("here3");
        return new UserItemProcessor();
    }

    @Bean
    public JdbcBatchItemWriter<people> writer()
    {
        System.out.println("here4");
        JdbcBatchItemWriter<people> writer =new JdbcBatchItemWriter<people>();
        writer.setItemSqlParameterSourceProvider(new BeanPropertyItemSqlParameterSourceProvider<people>());
        writer.setSql("Insert into people (first_name,last_name) values (:fname,:lname)");  
        writer.setDataSource(dataSource);   
        return writer;
    }

    @Bean
    public Step step1()
    {
        System.out.println("here5");
        return stepBuilderFactory.get("step1").<people,people> chunk(3).
            reader(reader()).
            processor(processor()).
            writer(writer())
            .build();

    }

    @Bean
    public Job importUserJob()
    {
        System.out.println("here6");
        return jobBuilderFactory.get("importUserJob").
                incrementer(new RunIdIncrementer()).
                flow(step1()).
                end().
                build();

    }


}