如果你提供

'folderA/folderB/folderC/mainfolder/*/*'

作为一个输入，如果要过滤掉特定的路径，您可能需要创建一个自定义的pathfilter
在fileinputformat中有这个函数-

static void setInputPathFilter (JobConf conf, Class<? extends PathFilter> filter)
Info: Set a PathFilter to be applied to the input paths for the map-reduce job

例如。

public static class CustomPathFilter implements PathFilter {
    @Override
    public boolean accept(Path path) {
        //you can implement your logic for finding the valid range of paths here.
        //The valid range of dates and days for directories and files can be input 
        //as arguments to the job.
        //Return true if you find a match or else return false.
        return false; 
    }
}

像这样注册路径过滤器-

FileInputFormat.setInputPathFilter(job, CustomPathFilter.class);