Excel读取多个文件Java Apache POI
我能够从一个excel中阅读一张表格,并用它在另一个excel中书写。不过现在我想浏览一个excel文件文件夹。我该怎么做? 此程序用于一个特定文件。我想从多个xls文件中读取,从每个xls文件中提取第1页,并在新文件中仅打印第一页Excel读取多个文件Java Apache POI,java,excel,apache-poi,Java,Excel,Apache Poi,我能够从一个excel中阅读一张表格,并用它在另一个excel中书写。不过现在我想浏览一个excel文件文件夹。我该怎么做? 此程序用于一个特定文件。我想从多个xls文件中读取,从每个xls文件中提取第1页,并在新文件中仅打印第一页 public static boolean readWriteXLSXFile() throws IOException { //File filename=new File("/temp/raw"); //InputStream ExcelFileToR
public static boolean readWriteXLSXFile() throws IOException
{
//File filename=new File("/temp/raw");
//InputStream ExcelFileToRead = new FileInputStream(filename);
String pathname="C:/temp/";
String ffile="raw";
String oldfilename = pathname + ffile;
String newExcel = "C:/temp/updatedraw";
String sheetname= ffile + "Sheet";
InputStream ExcelFileToRead = new FileInputStream(oldfilename);
XSSFWorkbook workbook = new XSSFWorkbook(ExcelFileToRead);
XSSFSheet datatypeSheet = workbook.getSheetAt(0);
XSSFWorkbook workbook1 = new XSSFWorkbook();
XSSFSheet newsheet = workbook1.createSheet(sheetname);
XSSFRow currentRow, newrow;
XSSFCell currentCell, newcell;
Iterator iterator = datatypeSheet.rowIterator();
int rowIndex=0;
while (iterator.hasNext())
{
currentRow=(XSSFRow) iterator.next();
newrow=newsheet.createRow(currentRow.getRowNum());
int cellIndex=0;
Iterator cellIterator = currentRow.cellIterator();
while (cellIterator.hasNext())
{
currentCell=(XSSFCell) cellIterator.next();
XSSFCellStyle newCellStyle ;
switch (currentCell.getCellType())
{
case XSSFCell.CELL_TYPE_STRING:
System.out.print(currentCell.getStringCellValue()+" ");
newcell= newrow.createCell(cellIndex);
newcell.setCellValue(currentCell.getStringCellValue());
newCellStyle = newcell.getSheet().getWorkbook().createCellStyle();
newCellStyle.cloneStyleFrom(currentCell.getCellStyle());
newcell.setCellStyle(newCellStyle);
cellIndex++;
break;
case XSSFCell.CELL_TYPE_NUMERIC:
System.out.print(currentCell.getNumericCellValue()+" ");
newcell= newrow.createCell(cellIndex);
newcell.setCellValue(currentCell.getNumericCellValue());
newCellStyle = newcell.getSheet().getWorkbook().createCellStyle();
newCellStyle.cloneStyleFrom(currentCell.getCellStyle());
newcell.setCellStyle(newCellStyle);
cellIndex++;
break;
default:
break;
}
}
FileOutputStream fileOut = new FileOutputStream(newExcel);
workbook1.write(fileOut);
fileOut.close();
System.out.println();
}
return true;
}`
步骤1:定义文件过滤器(这是一个典型Excel后缀的所有文件的示例,请根据需要进行调整): 步骤2:使用筛选器读取目录中的所有Excel文件:
FileFilter filter = new ExcelFileFilter ();
File directory = new File("MyDirectoryWithExcelfiles");
File[] files = directory.listFiles(filter);
for (File file : files) {
//init workbook and do stuff
}
只需扫描目录中具有适当扩展名的文件,您可以告诉我如何:/。。。。我知道它的基本原理
FileFilter filter = new ExcelFileFilter ();
File directory = new File("MyDirectoryWithExcelfiles");
File[] files = directory.listFiles(filter);
for (File file : files) {
//init workbook and do stuff
}