java - 从excel文件中读取数据，出现错误

Question

我正在读取 Excel 文件并将其存储在 map 中以供进一步使用。使用下面的代码，运行完美。但对于某些文件，打开时会显示以下错误

代码:

private Workbook workbook;
    public Map<String,String> readMaster(Properties properties) {
    Map<String,String> masterMap = new HashMap<String, String>();
     try {
            File masterFile = new File(properties.get(ReportConstants.DCS_INPUT_PATH) + ReportConstants.DCS_MASTER_FILE);
            if(!masterFile.exists()){
                throw new FileNotFoundException();
            }else{
            FileInputStream excelFile = new FileInputStream(masterFile);
            workbook = new XSSFWorkbook(excelFile);
            Sheet datatypeSheet = workbook.getSheetAt(0);
            Iterator<Row> iterator = datatypeSheet.iterator();
            int headItr = 0;
            while (iterator.hasNext()) {
                String key="",value="";
                Row currentRow = iterator.next();
                Iterator<Cell> cellIterator = currentRow.iterator();
                int rowItr = 0;
                while (cellIterator.hasNext()) {
                    Cell cell = cellIterator.next();
                    //Some logic
}
masterMap.put(key, value);
                    }
                }

             for (Map.Entry<String,String> entry : masterMap.entrySet()){  
                    System.out.println("Key = " + entry.getKey() + 
                                     ", Value = " + entry.getValue()); 
            } 
            if(!masterMap.isEmpty()){
                /*FileUtility.checkDestinationDir(""+properties.get(ReportConstants.DCS_ARCHIVE_PATH));
                FileUtility.moveFile(properties.get(ReportConstants.DCS_INPUT_PATH) + ReportConstants.DCS_MASTER_FILE,
                        properties.get(ReportConstants.DCS_ARCHIVE_PATH)+ReportConstants.DCS_MASTER_FILE+FileUtility.getArchivedPattern());*/
            }else{
                EmailService.sendExceptionMail(properties.getProperty(ReportConstants.EMAIL_EXCEPTION_TO),
                        properties.getProperty(ReportConstants.EMAIL_EXCEPTION_CC),
                                " No data in master file ",
                                "DCS : Empty Master File");
                throw new Exception("No data in master file");
            } 

        } catch (FileNotFoundException e) {
            log.error("File not present while reading Master file ",e);
            EmailService.sendExceptionMail(properties.getProperty(ReportConstants.EMAIL_EXCEPTION_TO),
                    properties.getProperty(ReportConstants.EMAIL_EXCEPTION_CC),
                            " File not present while reading Master file \n\n"+e.getMessage(),
                            "DCS Report : Master File");
        } catch (IOException e) {
            log.error("Input/Output Exception occured while reading Master file ",e);
            EmailService.sendExceptionMail(properties.getProperty(ReportConstants.EMAIL_EXCEPTION_TO),
                    properties.getProperty(ReportConstants.EMAIL_EXCEPTION_CC),
                            " Input/Output Exception occured while reading Master file \n\n"+e.getMessage(),
                            "DCS Report : Master File");
        } catch (Exception e) {
            log.error("Genric exception occured while reading Master file ",e);
            EmailService.sendExceptionMail(properties.getProperty(ReportConstants.EMAIL_EXCEPTION_TO),
                    properties.getProperty(ReportConstants.EMAIL_EXCEPTION_CC),
                            "Exception Occurred : \n\n"+e.getMessage(),
                            "DCS Report : Master File");
        }
     finally{
         try {
                if (null!=excelFile) {
                    excelFile.close();
                }
                if(null!=workbook){
                    workbook.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }



 }
         return masterMap;
    }

此外，我将详细信息保存到 map 并将其返回以供以后使用。我正在使用:

• poi-3.13.jar
• java 1.7

编辑1:添加了我完成的方法，希望它有助于重现问题。

编辑2:在错误弹出消息上单击"is"并保存后，程序运行正常。

有什么办法可以解决这个问题吗？请推荐

Answer 1

对于上面提到的文件，我使用下面的代码片段来读取文件，它返回 StreamingReader 对象。它可以像 Sheet 一样进一步使用。

代码

import com.monitorjbl.xlsx.StreamingReader;

public static StreamingReader getExcelSheet(File excelFile, String sheetName) throws Exception{
        StreamingReader reader = null;
        reader = StreamingReader.builder()
                .rowCacheSize(100) // number of rows to keep in memory (defaults to 10)
                .bufferSize(4096) // buffer size to use when reading InputStream to file (defaults to 1024)
                .sheetName(sheetName) // index of sheet to use (defaults to 0)
                .read(excelFile);
        return reader;
    }

StreamingReader sheet1 = FileUtility.getExcelSheet(excelFile, sheetName);   
for (Row r : sheet1){

    // iterate row here

    for (Cell cell : r) {

    //iterate cells here

    }

}

希望这对某人有帮助。