Spring batch 在步骤后调用后发生页脚回调

My spring batch writer实现了页脚回调和步骤执行侦听器，如下所示：

public class MyItemWriter implements ItemWriter<MyBean>, FlatFileFooterCallback, StepExecutionListener, ItemStream

public void writeFooter(Writer writer) throws IOException {
this.one = "this is a test";
}

public ExitStatus afterStep(StepExecution stepExecution) {
File file = new File("myFile");
try {
      FileUtils.write(file, this.one);          
 } catch (IOException e) {
      e.printStackTrace();
   } 
  return null;
}

我的footerCallback和afterStep方法如下：

public class MyItemWriter implements ItemWriter<MyBean>, FlatFileFooterCallback, StepExecutionListener, ItemStream

public void writeFooter(Writer writer) throws IOException {
this.one = "this is a test";
}

public ExitStatus afterStep(StepExecution stepExecution) {
File file = new File("myFile");
try {
      FileUtils.write(file, this.one);          
 } catch (IOException e) {
      e.printStackTrace();
   } 
  return null;
}

很明显，我在footerCallBack中设置属性字符串one，然后在afterStep方法中使用它

但是，文件中写入的值为空

在调试时，我发现在writeFooter之前调用了afterStep方法

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但这不是错吗？这一步不应该在页脚回调结束后才完成吗？

如果不深入了解细节，我将遵循您的结论，请创建一个Jira@MichaelLange：创刊于《吉拉》1892期。。。谢谢