Spring Batch -如何将从CSV读取的行存储到执行上下文中以实现可重启性

<bean id="reader" class="org.springframework.batch.item.file.FlatFileItemReader">
    <property name="resource" value="file:input.csv" />
    <property name="lineMapper">
        <bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
            <property name="lineTokenizer">
                <bean class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
                    <property name="delimiter" value="," />
                    <property name="names" value="column1,column2,column3" />
                </bean>
            </property>
            <property name="fieldSetMapper">
                <bean class="org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper">
                    <property name="prototypeBeanName" value="item" />
                </bean>
            </property>
        </bean>
    </property>
</bean>

public class Item {
    private String column1;
    private String column2;
    private String column3;
    
    // Getters and setters
}

<batch:job id="myJob">
    <batch:step id="step1">
        <batch:tasklet>
            <batch:chunk reader="reader" writer="writer" commit-interval="10" />
            <batch:listeners>
                <batch:listener>
                    <bean class="org.springframework.batch.core.listener.ExecutionContextPromotionListener">
                        <property name="keys" value="item" />
                    </bean>
                </batch:listener>
            </batch:listeners>
        </batch:tasklet>
    </batch:step>
</batch:job>

public class ItemWriter implements ItemWriter<Item> {
    @Override
    public void write(List<? extends Item> items) throws Exception {
        // 将Item对象写入目标数据存储
    }
}