如何使用java在Excel中的多个单元格中写入数据？
我写了一个代码，用于在Excel工作表中写入数据。在这里，我必须将数据写入多个单元格中，但它显示了一些错误。对于一个单元格，它能够更改数据。我为了更改数据在多个单元格中。为此它显示错误。 任何人都可以告诉我，我错了。
import java.io.*; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Iterator; import java.util.List; import java.util.Vector; import java.lang.String; import javax.swing.JOptionPane; import jxl.Cell; import org.apache.poi.hssf.util.CellReference; import org.apache.poi.ss.formula.functions.Column; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.xssf.usermodel.XSSFCell; import org.apache.poi.xssf.usermodel.XSSFComment; import org.apache.poi.xssf.usermodel.XSSFRow; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; public class Sele1 { public static void main(String[] args) { // TODO Auto-generated method stub String FileName = "C:\\Users\\u304081\\Desktop\\Java\\new.xlsx"; try { FileInputStream fileInputStream3 = new FileInputStream(FileName); File outputsheetfile1 = new File(FileName); if(outputsheetfile1.exists()) { System.out.println("File existed"); try { XSSFWorkbook ObjWorkBook = new XSSFWorkbook(fileInputStream3); XSSFSheet DriverTableSheet = ObjWorkBook.getSheetAt(0); for(int i=1;i<3;i++) { XSSFRow row1 = DriverTableSheet.getRow(i); XSSFCell Cell1 = row1.getCell(0); System.out.println("Cell1"+ Cell1); //System.out.println("Cell2"+ Cell2); String str = "Abc"; Cell1.setCellValue(str); FileOutputStream out1 = new FileOutputStream (FileName,false); ObjWorkBook.write(out1); fileInputStream3.close(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } 我得到的错误是：
ObjWorkBook.write(out1); `"poi-bin-3.9-20121203\poi-3.9\poi-ooxml-3.9-20121203.jar has no source attachment"`
HSSFWorkbook workbook = new HSSFWorkbook(); HSSFSheet sheet = workbook.createSheet("Course Pack Resolution Details"); outputFileName = outPut.getAbsolutePath(); int rownum = 0;`enter code here` for (int i = 0; i < dataList.size(); i++) { Object[] objArr = dataList.get(i); HSSFRow row = sheet.createRow(rownum++); int cellnum = 0; for (Object obj : objArr) { Cell cell = row.createCell(cellnum++); sheet.autoSizeColumn((short) cellnum); if (obj instanceof Date) { cell.setCellValue((Date) obj); } else if (obj instanceof Boolean) { cell.setCellValue((Boolean) obj); } else if (obj instanceof String) { cell.setCellValue((String) obj); } else if (obj instanceof Double) { cell.setCellValue((Double) obj); } } } if (outPut.exists()) { outPut.delete(); } FileOutputStream out = new FileOutputStream(outPut); workbook.write(out);
DataList是Array对象的ArrayList，因此您可以input尽可能多的数据。
DataList的例子：
dataList.add(new Object[]{"Sr No.", "Cols1", "cols2", "cols3"......."colsn"});
您可以在列表中插入相应的数据。 这个例子是.xls格式，如果你想.xlsx然后使用xssfworkbook。
可能会帮助你。
你提到的错误：
ObjWorkBook.write(out1); Here it is showing Error as "poi-bin-3.9-20121203\poi-3.9\poi-ooxml-3.9-20121203.jar has no source attachment"
似乎没有任何关系到你提到的有关在多个单元格中写入数据的问题。
你可能想看看这个：
我如何链接到Eclipse的jar包中的源代码？
=======在excel文件中的数据写入框架===============
HSSFWorkbook workbook = new HSSFWorkbook(); HSSFSheet sheet = workbook.createSheet("Sample sheet"); Map<String, Object[]> data = new HashMap<String, Object[]>(); data.put("1", new Object[] {"empNo.", "name", "salary"}); data.put("2", new Object[] {1, "John", 1500000d}); data.put("3", new Object[] {2, "Sam", 800000d}); data.put("4", new Object[] {3, "Dean", 700000d}); Set<String> keyset = data.keySet(); int rownum = 0; for (String key : keyset) { Row row = sheet.createRow(rownum++); Object [] objArr = data.get(key); int cellnum = 0; for (Object obj : objArr) { Cell cell = row.createCell(cellnum++); if(obj instanceof Integer) cell.setCellValue((Integer)obj); else if(obj instanceof String) cell.setCellValue((String)obj); else if(obj instanceof Double) cell.setCellValue((Double)obj); } } try { //new excel file created by fileoutput stream object FileOutputStream out = new FileOutputStream(new File("/home/jagasan/workspace-playexcelApp/public/ExcelFile3.xlsx")); workbook.write(out); out.close(); System.out.println("Excel written successfully.."); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return ok("file reading is completed");
=======从excel中读取数据并在playframework中存储数据库=======
public class Application extends Controller { /* * public Result index() { return * ok(index.render("Your new application is ready.")); } */ public Result readExcel() throws FileNotFoundException { try{ InputStream ExcelFileToRead = new FileInputStream("/home/jagasan/workspace-play/excelApp/public/ExcelFile3.xlsx"); HSSFWorkbook wb = new HSSFWorkbook(ExcelFileToRead); HSSFSheet sheet=wb.getSheetAt(0); HSSFRow row; HSSFCell cell; Iterator rows = sheet.rowIterator(); boolean flag=false; while (rows.hasNext()) { row=(HSSFRow) rows.next(); if(flag==false) { flag=true; continue; } Iterator cells = row.cellIterator(); ExcelFile excelfile=new ExcelFile(); int i=0; while (cells.hasNext()) { cell=(HSSFCell) cells.next(); if(i==0) excelfile.setEmpNo((int)cell.getNumericCellValue()); if(i==1) excelfile.setName(cell.getStringCellValue()); if(i==2) excelfile.setSalary(cell.getNumericCellValue()); i++; } excelfile.save(); } } catch(Exception e) { e.printStackTrace(); System.out.println("error"); } return ok("successful"); }
======在build.sbt =======
使用依赖的jar文件意味着apache API
libraryDependencies ++= Seq( javaJdbc, cache, javaWs, "org.apache.poi" % "poi" % "3.8", "org.apache.poi" % "poi-ooxml" % "3.9" )