import org.springframework.batch.integration.launch.JobLaunchRequest; //导入依赖的package包/类
@Test
public void testMessageFileToJobLaunchRequestConversion() {
    // given
    final Message<File> message = mock(Message.class);
    final File file = mock(File.class);
    when(file.getAbsolutePath()).thenReturn(PATH);
    when(message.getPayload()).thenReturn(file);
    final Instant timestamp = Instant.ofEpochSecond(TIMESTAMP);
    when(clock.instant()).thenReturn(timestamp);

    // when
    final JobLaunchRequest jobLaunchRequest = transformer.toRequest(message);

    // then
    assertThat(jobLaunchRequest.getJob(), is(job));
    assertThat(jobLaunchRequest.getJobParameters().getLong(FileMessageToJobRequest.TIMESTAMP_PARAMETER), equalTo(TIMESTAMP));
    assertThat(jobLaunchRequest.getJobParameters().getString(PARAMETER), equalTo(PATH));
}
 

import org.springframework.batch.integration.launch.JobLaunchRequest; //导入依赖的package包/类
@Transformer
public JobLaunchRequest fromFile(@Headers Map<String, Object> map, @Payload File file) throws Exception {
    if (log.isDebugEnabled()) {
        log.debug(String.format("a new file has appeared (%s).", file.getAbsolutePath()));
        for (String k : map.keySet()) {
            log.debug(String.format("header %s = %s", k, map.get(k)));
        }
    }
    JobParameters parms = new JobParametersBuilder()
            .addDate("date", new Date())
            .addString("input.file", "file:///" + file.getAbsolutePath())
            .toJobParameters();

    return new JobLaunchRequest(this.job, parms);

}
 

import org.springframework.batch.integration.launch.JobLaunchRequest; //导入依赖的package包/类
@Bean
IntegrationFlow batchJobFlow(Job job,
                             JdbcTemplate jdbcTemplate,
                             JobLauncher launcher,
                             MessageChannel files) {

    return IntegrationFlows.from(files)
            .transform((GenericTransformer<Object,JobLaunchRequest>) file -> {
                System.out.println(file.toString());
                System.out.println(file.getClass());
                return null ;
            })
            .transform((GenericTransformer<File, JobLaunchRequest>) file -> {
                JobParameters jp = new JobParametersBuilder()
                        .addString("file", file.getAbsolutePath())
                        .toJobParameters();
                return new JobLaunchRequest(job, jp);
            })
            .handle(new JobLaunchingGateway(launcher))
            .handle(JobExecution.class, (payload, headers) -> {
                System.out.println("job execution status: " + payload.getExitStatus().toString());

                List<Person> personList = jdbcTemplate.query("select * from PEOPLE",
                        (resultSet, i) -> new Person(resultSet.getString("first"),
                                resultSet.getString("last"),
                                resultSet.getString("email")));

                personList.forEach(System.out::println);
                return null;
            })
            .get();

}
 

import org.springframework.batch.integration.launch.JobLaunchRequest; //导入依赖的package包/类
@Transformer(inputChannel = "inboundFileChannel", outputChannel = "outboundJobRequestChannel")
public JobLaunchRequest toRequest(final Message<File> message) {
    log.debug("toRequest : {}", message);
    final Instant timestamp = clock.instant();
    final JobParameters jobParameters =
            new JobParametersBuilder()
                    .addString(jobParameter, message.getPayload().getAbsolutePath())
                    .addLong(TIMESTAMP_PARAMETER, timestamp.getEpochSecond())
                    .toJobParameters();
    return new JobLaunchRequest(job, jobParameters);
}
 

import org.springframework.batch.integration.launch.JobLaunchRequest; //导入依赖的package包/类
public JobLaunchRequest toRequest(Message<File> message) {
	JobParametersBuilder jobParametersBuilder =
			new JobParametersBuilder();

	jobParametersBuilder
			.addString(fileName, message.getPayload().getAbsolutePath())
			.addDate("run.date", new Date());

	return new JobLaunchRequest(job, jobParametersBuilder.toJobParameters());
}
 

import org.springframework.batch.integration.launch.JobLaunchRequest; //导入依赖的package包/类
@Transformer
public JobLaunchRequest toRequest(Message<File> message) {
	JobParametersBuilder jobParametersBuilder = new JobParametersBuilder();
	jobParametersBuilder.addString(fileParameterName, message.getPayload().getAbsolutePath());
	return new JobLaunchRequest(job, jobParametersBuilder.toJobParameters());
}