java - 如何在 Spring Batch 模块中一次读取多个文件？

Question

我希望我的 Spring Batch 模块一次读取多个文件。目前，我的批处理模块一次只能读取一个文件，但我可以从批处理模块中读取多行。我该如何实现这个？

<core type="BatchCreate" class="com.batch.BatchCore" concurrency="1" start="20" stop="80" status="true">

Answer 1

您可以使用MultiResourceItemReader读取多个文件。

下面是相同的java配置

@Bean
  public MultiResourceItemReader<POJO> multiResourceItemReader() {
    MultiResourceItemReader<POJO> resourceItemReader = new MultiResourceItemReader<POJO>();
        ClassLoader cl = this.getClass().getClassLoader();
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(cl);

    Resource[] resources = resolver.getResources("file:" + filePath );
    resourceItemReader.setResources(resources);
    resourceItemReader.setDelegate(reader());
    return resourceItemReader;
  }

  @Bean
  public FlatFileItemReader<POJO> reader() {
    FlatFileItemReader<POJO> reader = new FlatFileItemReader<POJO>();
    reader.setLineMapper(new DefaultLineMapper() {{
      setLineTokenizer(new DelimitedLineTokenizer() {{
        setNames(new String[]{"id1", "POJO"});
      }});
      setFieldSetMapper(new BeanWrapperFieldSetMapper<POJO>() {{
        setTargetType(POJO.class);
      }});
    }});
    return reader;
  }