在Spring批处理中不可能将作业参数传递给step作用域bean

Question

我正在使用Spring batch编写一个批处理，并试图将一个作业参数传递给item reader bean定义，但是当我执行该批处理时，我总是得到以下错误：

org.springframework.expression.spel.SpelEvaluationException: EL1027E:(pos 13): Indexing into type 'org.springframework.batch.core.JobParameters' is not supported

/**
 * Job producing an XML file aimed at synchronizing Appipay data with ForHRM data
 *
 * @author francois.dupire
 */
@Configuration
@Import(BatchConfiguration.class)
@ComponentScan(basePackageClasses = BusinessObjectServiceImpl.class)
public class ForHRMToAppipayDescriptiveDataSyncJobConfiguration {

    /*
     * Constants
     */
    public static final String JOB_NAME = "forHRMToAppipaySyncJob";
    private static final String FORHRM_TO_APPIPAY_SYNC_STEP = "forHRMToAppipaySyncStep";

    private static final int CHUNK_SIZE = 10;

    /*
     * Fields
     */
    private final JobBuilderFactory jobBuilderFactory;
    private final StepBuilderFactory stepBuilderFactory;

    /*
     * Constructors
     */
    @Autowired
    public ForHRMToAppipayDescriptiveDataSyncJobConfiguration(JobBuilderFactory jobBuilderFactory, StepBuilderFactory stepBuilderFactory) {
        this.jobBuilderFactory = jobBuilderFactory;
        this.stepBuilderFactory = stepBuilderFactory;
    }

    /*
     * Job
     */
    @Bean
    public Job forHRMToAppipaySyncJob(Step forHRMToAppipaySyncStep) {
        return jobBuilderFactory
                .get(JOB_NAME)
                .start(forHRMToAppipaySyncStep)
                .build();
        // TODO Add parameters validator
    }

    /*
     * Steps
     */
    // Sync step
    @Bean
    public Step forHRMToAppipaySyncStep(AppipaySyncTriggersReader reader, AppipaySyncTriggersToAppipayDescriptiveDataProcessor processor, AppipayDescriptiveDataWriter writer) {
        return stepBuilderFactory
                .get(FORHRM_TO_APPIPAY_SYNC_STEP)
                .<List<SynchronisationAppipay>, Signaletiques>chunk(CHUNK_SIZE)
                .reader(reader)
                .processor(processor)
                .writer(writer)
                .build();
    }

    @Bean
    @StepScope
    public AppipaySyncTriggersReader appipaySyncTriggersReader(@Value("#{jobParameters['EMPCODE']}") String employerCode, SynchronisationAppipayRepository appipaySyncTriggerRepository) {
        return new AppipaySyncTriggersReader(employerCode, CHUNK_SIZE, appipaySyncTriggerRepository);
    }

Invalid property 'EMPCODE' of bean class [org.springframework.batch.core.scope.context.StepContext]: Bean property 'EMPCODE' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?

我只是不知道我做错了什么，因为根据我在网上发现的文档和其他帖子，一切似乎都很好。

编辑：我使用的是Spring 4.3.3和Spring Batch 3.0.7

Answer 1

我得到了我问题的答案。

在我导入到配置中的BatchConfiguration中，有一个jobParameters bean，它优先于传递给作业的参数。所以我的论点在这篇文章中找不到。我把它拿走了，它解决了我的问题。