从Tasklet存储在JobExecutionContext中并在另一个Tasklet中访问

你至少有4种可能性：

1. 使用ExecutionPromotionListener 将数据传递到以后的步骤
2. 使用（spring）bean来保存步间数据，例如ConcurrentHashMap
   如果不采取进一步措施，该数据将无法重新启动
   
3. 访问你的tasklet中的JobExecutionContext，应谨慎使用，这将导致并行步骤出现线程问题
4. 使用新的jobscope（引入的弹簧批次3）
   从Tasklet访问JobExecution的代码示例：
   

设定值

public class ChangingJobExecutionContextTasklet implements Tasklet {        @Override    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {        // set variable in JobExecutionContext        chunkContext     .getStepContext()     .getStepExecution()     .getJobExecution()     .getExecutionContext()     .put("value", "foo");        // exit the step        return RepeatStatus.FINISHED;    }}

提取值

public class ReadingJobExecutionContextTasklet implements Tasklet {    private static final Logger LOG = LoggerFactory.getLogger(ChangingJobExecutionContextTasklet.class);        @Override    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {        // pull variable from JobExecutionContext        String value = (String) chunkContext   .getStepContext()   .getStepExecution()   .getJobExecution()   .getExecutionContext()   .get("value");        LOG.debug("Found value in JobExecutionContext:" + value);        // exit the step        return RepeatStatus.FINISHED;    }}