请注意文件名，以及如何打印出我从计算机中选择的文件名？

Question

这是一个简单的问题，如何打印出选定的文件名，谢谢。

public class CSVMAX {
public CSVRecord hottestInManyDays() {
//select many csv files from my computer
   DirectoryResource dr = new DirectoryResource();
   CSVRecord largestSoFar = null;
//read every row and implement  the method we just define
   for(File f : dr.selectedFiles()) {
    FileResource fr = new FileResource(f);
    CSVRecord currentRow = hottestHourInFile(fr.getCSVParser());
    if (largestSoFar == null) {
       largestSoFar = currentRow;
    }
    else {
    double currentTemp = Double.parseDouble(currentRow.get("TemperatureF"));
        double largestTemp = Double.parseDouble(largestSoFar.get("TemperatureF"));
        //Check if currentRow’s temperature > largestSoFar’s
    if (currentTemp > largestTemp) {
                //If so update largestSoFar to currentRow
            largestSoFar = currentRow;
    }
   }
}
return largestSoFar;        
}

在这里，我想打印出文件名，但我不知道如何做到这一点。

public void testHottestInManyDay () {
    CSVRecord largest = hottestInManyDays();
    System.out.println("hottest temperature on that day was in file " + ***FILENAME*** + largest.get("TemperatureF") +
               " at " + largest.get("TimeEST"));
}
}

Answer 1

最终，hottestinmanydays()似乎需要返回此信息。

csvrecord有此属性吗？

类似于这样：

CSVRecord currentRow = hottestHourInFile(fr.getCSVParser());
currentRow.setFileName(f.getName());

private String _fileName;

public void setFileName(String fileName) {
    this._fileName = fileName;
}

public String getFileName() {
    return this._fileName;
}

class CSVWrapper {

    private CSVRecord _csvRecord;
    private String _fileName;

    // getters and setters for the above
    // maybe also a constructor?  make them final?  your call

}

CSVWrapper csvWrapper = new csvWrapper();
csvWrapper.setCSVRecord(currentRow);
csvWrapper.setFileName(f.getName());

CSVWrapper largest = hottestInManyDays();
System.out.println("hottest temperature on that day was in file " + largest.getFileName() + largest.getCSVRecord().get("TemperatureF") +
           " at " + largest.getCSVRecord().get("TimeEST"));