Question

我正在尝试将List数据写入一本工作簿中的多个excel表。与第一个列表一样，代码将创建新工作簿并为列表[1]创建新工作表，对于第二个列表，它将在现有工作簿中创建新工作表，依此类推。所以我写下面的代码。但它不起作用，我只能看到列表[1]的第一张表。有人可以帮我提供任何替代解决方案吗？

我编写的以下代码

    ArrayList<List<String>> tempresultdata=this.getSummaryList();
    HSSFWorkbook workbook = new HSSFWorkbook();
    String fileName="Path\\To\\XLS";
    File file = new File(fileName);
    FileOutputStream out;           
    if(!file.exists()) // This will create new workbook with new sheet if it doesnt exists{

                HSSFSheet mySheet = workbook.createSheet(sheetname);
                writeExcel(mySheet,tempresultdata);
    } else // This add new sheet to above created workbook {
            try {
                HSSFWorkbook myWorkBook = (HSSFWorkbook) WorkbookFactory.create(file);
                workbook=myWorkBook;
                HSSFSheet mySheet = (HSSFSheet) workbook.createSheet(sheetname);
                writeExcel(mySheet,tempresultdata);                 
            } catch (InvalidFormatException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
    }   
    try{
        out = new FileOutputStream(fileName,true);
        workbook.write(out);
        out.close();
        }catch(Exception e){ 
            e.printStackTrace();
        }

谢谢， Priyank Shah

Answer 1

如果文件不存在，则此代码创建新文件并创建示例sheet1但如果文件存在则将新工作表添加到现有excel文件。

    HSSFWorkbook workbook = null;
    File file = new File(context.getExternalFilesDir(null), "Sample.xls");
    FileOutputStream fileOut = new FileOutputStream(file);

    if (file.exists()) {
        try {
            workbook = (HSSFWorkbook)WorkbookFactory.create(file);
        } catch (InvalidFormatException e) {
            e.printStackTrace();
        }
        HSSFSheet sheet = workbook.createSheet("Sample sheet2");
    }
    else{
        workbook = new HSSFWorkbook();
        HSSFSheet sheet = workbook.createSheet("Sample sheet1");
    }
    workbook.write(fileOut);
    fileOut.close();

Answer 2

您似乎只是在写出sheet而不是workbook

Answer 3

您可以使用Bhaskar的代码解决问题并使用WorkbookFactory，您可能需要下载poi-ooxml-3.7.jar文件。

以下是您的链接：

http://grepcode.com/snapshot/repo1.maven.org/maven2/org.apache.poi/poi-ooxml/3.7

Answer 4

要将多个Excel工作表添加到新的Excel文件，需要从一个工作簿创建这些工作表，并将其写入文件输出流

import java.io.*;
import java.util.*;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.*;

public class JustATest {
   public static void main(String[] args) throws Exception  {       

        XSSFWorkbook AWorkbook = new XSSFWorkbook(); //Create blank workbook 

        for (int i = 0; i < 10; i++) {
            XSSFSheet spreadsheet = AWorkbook.createSheet(" Employee "+i);

            // the follwing code is to create dummy data in sheets 
            // is similar to the one at tutorialPoint.com
            XSSFRow row;            
            //This data needs to be written (Object[])
            Map < String, Object[] > empinfo =    new TreeMap< String, Object[] >();
            empinfo.put( "1", new Object[] { "EMP ID", "EMP NAME", "DESIGNATION" });
            for (int j = 0; j < i; j++) {
                empinfo.put( j+2+"", new Object[] {  j+2+"", "Fadel K", "Technical Manager" });                
            }          
            //Iterate over data and write to sheet
            Set<String> keyid = empinfo.keySet();
            int rowid = 0;
            for (String key : keyid){
               row = spreadsheet.createRow(rowid++);
               Object [] objectArr = empinfo.get(key);
               int cellid = 0;
               for (Object obj : objectArr){
                  Cell cell = row.createCell(cellid++);
                  cell.setCellValue((String)obj);
               }
            }            
            // dummy data creation over.
        }       

        // here you write all sheets at once, by writing the entier workbook
        FileOutputStream out = new FileOutputStream(new File("AllData.xlsx"));
        AWorkbook.write(out);
        out.close();               
   }
}

Answer 5

在使用现有工作簿时，您不应该创建文件对象，只需要将文件位置提供给FileInputStream对象并将其传递给工作簿对象，然后执行您想要执行的任何操作与现有文件。要添加工作表，只需使用create Method命令

public void AddsheetintoExistingworkbook(String sheetname) throws IOException, InvalidFormatException{

    //***************************Add a sheet into Existing workbook***********************************************


 String path="C:\\Workspace\\Selenium_2.53\\src\\InputFiles\\Temp.xlsx";
 fileinp = new FileInputStream(path);
 workbook = new XSSFWorkbook(fileinp);
 workbook.createSheet(sheetname);

 fileOut = new FileOutputStream(path);
    workbook.write(fileOut);
    fileOut.close();
 System.out.println("File is written successfully");    
}

如何使用apache POI将新工作表添加到现有excel工作簿？

5 个答案: