import org.springframework.batch.item.support.ListItemReader; //导入依赖的package包/类
@Bean
@StepScope
public ItemReader<String> itemReader() {
	final List<String> items = IntStream.range(0, 1000).mapToObj(String::valueOf).collect(toList());

	return new ListItemReader<String>(items);
}
 

import org.springframework.batch.item.support.ListItemReader; //导入依赖的package包/类
@Bean
@StepScope
public ItemReader<String> firstReader(@Value("#{jobParameters[message]}") String text) {
    log.info("+++ r-r-r  {} ", text);
  return new ListItemReader<>(Lists.newArrayList(text));
}
 

import org.springframework.batch.item.support.ListItemReader; //导入依赖的package包/类
@Bean
public ItemReader<String> reader() {
	return new ListItemReader<String>(Arrays.asList("1", "2", "3"));
}
 

import org.springframework.batch.item.support.ListItemReader; //导入依赖的package包/类
/**
 * Reads a file containing direcly an array of objects which should be converted to a list of {@code clazz} elements.
 *
 * @param resource the resource wich a JSON array of objects where each object should be converted to an instance of {@code clazz}
 * @param clazz the type element the ItemReader should return
 * @param <T> the type element the ItemReader should return
 * @return item reader
 * @throws IOException in case the resource reading did not work or the JSON mapping
 */
public static <T> ItemReader<T> createJsonListReader(final Resource resource, final Class<T> clazz) throws IOException {
    final List<T> listFromJsonResource = createJsonList(resource, clazz);
    return new ListItemReader<>(listFromJsonResource);
}