Spring Batch：如何从ItemReader或ItemWriter中访问当前步骤的ID /名称

Question

I am quite new to Spring-Batch and I wonder whether there is a way to access the step-id from within an ItemReader or ItemWriter?

In my case that would allow switching enum types based on different step-definitions in a single ItemReader implementation.

Does anyone know a way to do that?

Answer 1

Assuming the ItemReader or ItemWriter are step scoped, you can do this:

<bean id="flatFileItemReader" scope="step"
      class="org.springframework.batch.item.file.FlatFileItemReader">
    <property name="resource" value="#{stepExecution.stepName}" />
</bean>

Answer 2

It is as simple as implementing a with @BeforeStep annotated method:

@BeforeStep
public void beforeStep(StepExecution stepExecution){
    String name = stepExecution.getStepName();
    System.out.println("name: " + name);
}

Placed it in my ItemReader and that's it ...