How to read all files in a folder with spring-batch and MultiResourceItemReader?

Question

I want to configure spring-batch to read all csv files inside a specific folder sequentially.

The following does not work because the deleg

Answer 1

Read multiple files from Absolute file path:

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