基于Spring-Batch Java的CSV FileItemWriter

Question

我有一个Spring批处理服务，允许ItemWriter将数据写入CSV。我已经使用了Spring Batch Guide给出的示例。https://spring.io/guides/gs/batch-processing/

null

@Bean
public ItemWriter<Person> writer(DataSource dataSource) {

FlatFileitemWriter<Person> csvWriter = new FlatFileItemWriter<Person>();
csvWriter.setResource(new ClassPathResource("csv/new-data.csv"));
csvWriter.setShouldDeleteIfExists(true);
DelimitedLineAggregator<Person> lineAggregator = new DelimitedLineAggregator<Person>();
lineAggregator.setDelimiter(","); 

BeanWrapperFieldExtractor<Person> fieldExtractor = new BeanWrapperFieldExtractor<Person>();
String[] names = {"firstName", "lastName"};
fieldExtractor.setNames(names);
lineAggregator.setFieldExtractor(fieldExtractor);
csvWriter.setLineAggregator(lineAggregator);
    return csvWriter;
}

Answer 1

您正在使用ClassPathResource写入。我不确定，但我不认为您可以写入ClasspathResource。请尝试使用普通的FileSystemResource，然后再试一次。

而且，你如何注入作家？您确定它真的被实例化为spring bean吗？既然不需要DataSource来实例化FlatFileItemWriter,为什么要将DataSource作为参数。