使用jxl將數據添加到Excel文件

我使用jxl創建了一個excel文件。首先應該只包含一些關於樣式的格式和信息。然後，每次有人向其添加新數據時都應該更新它。使用jxl將數據添加到Excel文件

public class WriteExcel { 

    private static WritableWorkbook workbook; 
    private static WritableCellFormat timesStandard; 
    private String inputFile; 
    final private static int FONT_SIZE = 12; 


    public void setOutputFile(String inputFile) { 
     this.inputFile = inputFile; 
    } 

    private void prepareSheet(WritableSheet sheet) throws WriteException { 
     sheet.mergeCells(0, 0, 1, 0); 
     sheet.mergeCells(3, 0, 4, 0); 
     sheet.mergeCells(6, 0, 7, 0); 

     WritableFont times12pt = new WritableFont(WritableFont.TIMES, FONT_SIZE); 
     timesStandard = new WritableCellFormat(times12pt); 

     CellView cv = new CellView(); 
     cv.setFormat(timesStandard); 
    } 

    public void write() throws IOException, WriteException { 
     File file = new File(inputFile); 
     WorkbookSettings wbSettings = new WorkbookSettings(); 
     wbSettings.setLocale(new Locale("en", "EN"));  

     WritableWorkbook workbook = Workbook.createWorkbook(file, wbSettings); 
     workbook.createSheet("First", 0); 
     WritableSheet excelSheet = workbook.getSheet(0); 
     prepareSheet(excelSheet); 

     workbook.write(); 
     workbook.close(); 
    } 

    public static void main(String[] args) throws WriteException, IOException { 
     WriteExcel test = new WriteExcel(); 
     test.setOutputFile("c:/Users/H/Desktop/test.xls"); 
     test.write(); 
    } 
}

我明白，我需要另一個類，將讓我訪問文件和一些數據添加到它：

class Modify { 

    private static Logger logger = Logger.getLogger(Modify.class); 
    private File inputWorkbook; 
    private File outputWorkbook; 

    public Modify(String input, String output) { 
     inputWorkbook = new File(input); 
     outputWorkbook = new File(output); 
     logger.info("Input file: " + input); 
     logger.info("Output file: " + output); 
    } 

    public void readWrite() throws IOException, BiffException, WriteException { 
     logger.info("Reading..."); 
     Workbook w1 = Workbook.getWorkbook(inputWorkbook); 

     logger.info("Copying..."); 
     WritableWorkbook w2 = Workbook.createWorkbook(outputWorkbook, w1); 

     if (inputWorkbook.getName().equals("test.xls")) { 
      modify(w2); 
     } 

     w2.write(); 
     w2.close(); 
     logger.info("Done"); 
    } 

    private void modify(WritableWorkbook w) throws WriteException { 
     logger.info("Modifying..."); 

     WritableSheet sheet = w.getSheet("First"); 

     //createContent(sheet); // contains methods responsible for adding data, for example: 
     addNumber(sheet, cols, rows, 2); 

    private static void addNumber(WritableSheet sheet, int column, int row, double d) throws WriteException, RowsExceededException { 
     Number number; 
     number = new Number(column, row, d, timesStandard); 
     sheet.addCell(number); 

    } 
}

但我結束了一個空白Excel只合並單元格文件。

如何引入修改？

來源

2012-03-11 Hurdler

我沒有一個解決方案只是切換到[Apache的POI（http://poi.apache.org/）的建議。 – Kai 2012-03-11 21:28:50

這只是基本操作，jxl應該沒問題。 – Hurdler 2012-03-11 21:35:11

既然你操縱WritableWorkbook對象，它是不是你的類w2的一員，不應該你有你的modify()方法並不作廢，而是返回WritableWorkbook？

正如我所看到的，當您撥打modify()時，會發現一個新的變化，但由於範圍的原因，最後所有更改都會被刪除。

在最後，你會得到這樣的

private WritableWorkbook modify(WritableWorkbook w) throws WriteException { 
    logger.info("Modifying..."); 

    WritableSheet sheet = w.getSheet("First"); 

    //createContent(sheet); // contains methods responsible for adding data, for example: 
    addNumber(sheet, cols, rows, 2); 
    return sheet; 
    }

很基本。對於addNumber也進行了類似的修改。然後，相應的調用將是sheet = addNumber(sheet, cols, rows, 2);和w2 = modify(w2);

來源

2013-10-30 08:08:52 FrenchFigaro

如何使用JExcel API在Java中讀寫Excel文件。首先，我們需要創建一個excel工作簿，然後創建工作表並向工作表添加內容。

WritableWorkbook writableWorkbook = null; 
writableWorkbook = Workbook.createWorkbook(new File("WebSparrow.xls")); 
Workbook wb = null; 
wb = Workbook.getWorkbook(new File("WebSparrow.xls"));

檢查完整的例子http://www.websparrow.org/tutorials/java/how-to-read-and-write-excel-file-in-java

來源

2017-01-30 16:01:47

使用jxl將數據添加到Excel文件

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