使用Apache POI写入Excel

Question

Earlier I was using SAX parser for export to excel. Now I am not able to get data using Apache POI, Any suggestion??? This String in XML contains all the data which I retrieved through farpoint grid tech and set in the form in action class.

private void parseXML(String inXML) {
    /* // get a factory
    SAXParserFactory spf = SAXParserFactory.newInstance();
    try {
        // get a new instance of parser
        SAXParser sp = spf.newSAXParser();

        // parse the file
        sp.parse(new InputSource(new StringReader(inXML)), this);    
    } catch (IOException ie) {          
}*/

Now I am using this.

 HSSFWorkbook workbook = new HSSFWorkbook();
 HSSFSheet sheet = workbook.createSheet("Sample sheet");
 short rowNum = 0;
 short colNum = 0;

 Row row = sheet.createRow(rowNum++);
 Cell cell = row.createCell(colNum);
 cell.setCellValue(inXML);

 **/* Iterator<Row> rowIterator = sheet.iterator();
 while(rowIterator.hasNext()) {
     Row row = rowIterator.next();

     //For each row, iterate through each columns
     Iterator<Cell> cellIterator = row.cellIterator();
     while(cellIterator.hasNext()) {                       
         Cell cell = cellIterator.next();
         cell.setCellValue(inXML);

         switch(cell.getCellType()) {
             case Cell.CELL_TYPE_BOOLEAN:
                 System.out.print(cell.getBooleanCellValue() + "\t\t");
                 break;
             case Cell.CELL_TYPE_NUMERIC:
                 System.out.print(cell.getNumericCellValue() + "\t\t");
                 break;
             case Cell.CELL_TYPE_STRING:
                 System.out.print(cell.getStringCellValue() + "\t\t");
                 break;
         }
     }*/**

     try {
         FileOutputStream out = new FileOutputStream(new File("C:\\Excel.xls"));
         workbook.write(out);
         out.close();                                     
     } catch (FileNotFoundException e) {
         e.printStackTrace();
     } catch (IOException e) {
         e.printStackTrace();
     }    
}

Answer 1

This program (which is what you posted with added imports, without the comment block, with a literal string instead of the variable inXML and with the path removed from the output file):

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;

public class Main {
    public Main() {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args) {
        HSSFWorkbook workbook = new HSSFWorkbook();
        HSSFSheet sheet = workbook.createSheet("Sample sheet");
        short rowNum = 0;
        short colNum = 0;

        HSSFRow row = sheet.createRow(rowNum++);
        Cell cell = row.createCell(colNum);
        cell.setCellValue("<data>test data</data>");

        try {
            FileOutputStream out = new FileOutputStream(new File("Excel.xls"));
            workbook.write(out);
            out.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Produced exactly what you would expect: A spreadsheet with <data>test data</data> in cell A1.

Perhaps cell A1 in your spreadsheet is blank because inXML really is blank.