如何使用FlatFileItemReader处理动态列更改

Question

我需要读取CSV文件中特定列名的值

我明白我需要以这种方式静态声明所有列名：

 lineTokenizer.setNames(new String[]{"name1","name2","name3"});

例如，如果我只想读取列名称2的值，就这样做：

public class PushItemFieldSetMapper implements FieldSetMapper<MyObject > {

    @Override
    public MyObject mapFieldSet(FieldSet fieldSet) throws BindException {
        MyObject myobject= new MyObject ();
        pushItemDTO.setName2(fieldSet.readString("name2"));
        return myobject;
    }
}

但明天我可能会得到不同的CSV文件：

name7，NAME2 name9，name19

修改

之后需要重新编译我的代码

lineTokenizer.setNames...

我总是希望从特定列名称（在本例中为name2）中检索值，而不是关心其他列名称。如何在不静态声明我的列名称的情况下动态执行此操作？

正如所建议我尝试做这样的事情：

 public FlatFileItemReader<PushItemDTO> reader() {
        FlatFileItemReader<PushItemDTO> itemReader = new FlatFileItemReader<PushItemDTO>();
        itemReader.setSkippedLinesCallback(new LineCallbackHandler() {
            @Override
            public void handleLine(String line) {
                head=line;
            }
        });

        itemReader.setLineMapper(lineMapper());
        itemReader.setLinesToSkip(1);
        itemReader.setResource(new FileSystemResource("c:/newfile.txt"));
        return itemReader;
    }

 @Bean
    public LineMapper<PushItemDTO> lineMapper(String head) {
        DefaultLineMapper<PushItemDTO> lineMapper = new DefaultLineMapper<PushItemDTO>();
        DelimitedLineTokenizer lineTokenizer = new DelimitedLineTokenizer();
        lineTokenizer.setDelimiter(",");
        lineTokenizer.setStrict(true);

//need to inject into here somehow the head on each execution
            lineTokenizer.setNames( 
            });

//need to inject into here somehow the head on each execution
        BeanWrapperFieldSetMapper<PushItemDTO> fieldSetMapper = new BeanWrapperFieldSetMapper<PushItemDTO>();
        fieldSetMapper.setTargetType(PushItemDTO.class);


        lineMapper.setLineTokenizer(lineTokenizer);
        lineMapper.setFieldSetMapper(new PushItemFieldSetMapper());

但是我如何将头部传递给linemapper（）？