spring batch reading s3 files

Question

How to read files from s3 directly from FlatFileItemReader.

below is my FileItemreader. I am using java annotation . I followed the below link http://cloud.spring.io/spring-cloud-aws/spring-cloud-aws.html#_resource_handling

code

public  static FlatFileItemReader<Person> reader( String filenameStandard) {
            FlatFileItemReader<Person> reader = new FlatFileItemReader<Person>();
            reader.setLinesToSkip(1);
            System.out.println("Job parameter ++++++++++++++++++++++"+filenameStandard);
            //working configuration with ClassPathResource
           //reader.setResource(new ClassPathResource(filenameStandard));

          /* String location= "s3://"+ "iebr-input"+"/" +"test_data.csv";
           reader.setResource(new AmazonS3Resource(amazonS3ClientInitializer, "iebr-input", "test_data.csv"));*/



            reader.setRecordSeparatorPolicy(new DefaultRecordSeparatorPolicy());
            reader.setLineMapper(new DefaultLineMapper<Person>() {
                {

                    setLineTokenizer(new DelimitedLineTokenizer() {
                        {
                        //  setNames(new String[] { "id", "firstName", "lastName" ,"harmScore", "removabilityScore", "kowScore"});
                            setNames(new String[] {"case", "name", "ccd_case", "date_of_birth", "family", "fullname"
                                          });
                        }
                    });
                    setFieldSetMapper(new BeanWrapperFieldSetMapper<Person>() {
                        {
                            setTargetType(Person.class);
                        }
                    });
                }
            });
            return reader;
        }