如何在不使用java覆盖的情况下将列表数据写入特定列的现有xlsx文件

我有两个'xlsx'文件'sss.xlsx'和'abc.xlsx'。

在'sss.xlsx'文件中有一些标题（仅列，不包含任何数据），在'abc.xlsx'文件中有数据。

我想通过检查列名来逐列将'abc'文件中的数据复制到'sss'文件中。 如果列名称匹配，则将该列数据复制到“sss.xlsx”在同一列（保留列，因为它在sss文件中给出）。

我试着用下面的代码。 我能够写，但是写头被删除。 我没有得到我错误的地方。

码：

public class Read { private static int flag; public static void main(String[] args) throws IOException{ //Create blank workbook HSSFWorkbook workbook1 = new HSSFWorkbook(); //Create a blank sheet HSSFSheet spreadsheet = workbook1.createSheet( " Info "); ArrayList<String> lst = new ArrayList<String>(); Read read = new Read(); File f2 = new File("sss.xlsx"); FileInputStream ios2 = new FileInputStream(f2); XSSFWorkbook workbook2 = new XSSFWorkbook(ios2); XSSFSheet sheet2 = workbook2.getSheetAt(0); int noOfColumns = sheet2.getRow(0).getLastCellNum(); System.out.println(noOfColumns); //String temp2=f.getSheet(); Iterator<Row> rowIterator = sheet2.iterator(); while (rowIterator.hasNext()) { Row row = rowIterator.next(); Iterator <Cell> cellIterator = row.cellIterator(); while (cellIterator.hasNext()) { Cell cell1 = cellIterator.next(); String temp2=cell1.getStringCellValue().toString(); System.out.print(cell1.getStringCellValue() + "\n"); lst = read.extractExcelContentByColumnIndex(temp2); File f3 = new File("sss.xlsx"); FileInputStream ios = new FileInputStream(f3); XSSFWorkbook workbook3 = new XSSFWorkbook(ios); String temp1=f3.getName(); //String colName="Mob No"; XSSFSheet sheet3 = workbook3.getSheetAt(0); //String temp2=f.getSheet(); int columnIndex1=0; Iterator<Row> rowIterator3 = sheet3.iterator(); //columndata = new ArrayList<String>(); while (rowIterator3.hasNext()) { Row row3 = rowIterator3.next(); Iterator<Cell> cellIterator3 = row3.cellIterator(); while (cellIterator3.hasNext()) { Cell cell3 = cellIterator3.next(); String temp5=cell3.getStringCellValue().toString(); //System.out.println(temp); if(temp5.equals(temp2)){ columnIndex1 = cell1.getColumnIndex(); System.out.println(columnIndex1); flag=1; break; } } if(flag==1) { flag = 0; break; } } while (rowIterator.hasNext()) { Row row6 = rowIterator.next(); // System.out.println(row.getRowNum()); Iterator<Cell> cellIterator6 = row6.cellIterator(); while (cellIterator.hasNext()) { Cell cell = cellIterator.next(); if(row.getRowNum() > 0){ //To filter column headings if(cell.getColumnIndex() == columnIndex1){// To match column index // } } } } } for(int RowNum=0; RowNum<lst.size();RowNum++){ HSSFRow row1 = spreadsheet.createRow(RowNum+1); HSSFCell cell6 = row1.createCell(columnIndex1); cell6.setCellValue(lst.get(RowNum).toString()); } } //Write the workbook in file system FileOutputStream out = new FileOutputStream(new File("sss.xlsx")); // System.out.println(lst); workbook1.write(out); out.close(); } } public ArrayList<String> extractExcelContentByColumnIndex( String colName) { ArrayList<String> columndata = null; int columnIndex= 0; int flag=0; try { File f = new File("abc.xlsx"); FileInputStream ios = new FileInputStream(f); XSSFWorkbook workbook = new XSSFWorkbook(ios); String temp1=f.getName(); XSSFSheet sheet = workbook.getSheetAt(0); //String temp2=f.getSheet(); Iterator<Row> rowIterator = sheet.iterator(); columndata = new ArrayList<String>(); while (rowIterator.hasNext()) { Row row = rowIterator.next(); Iterator<Cell> cellIterator = row.cellIterator(); while (cellIterator.hasNext()) { Cell cell1 = cellIterator.next(); String temp=cell1.getStringCellValue().toString(); //System.out.println(temp); if(temp.equals(colName)){ columnIndex=cell1.getColumnIndex(); flag=1; break; } } if(flag==1) { flag = 0; break; } } while (rowIterator.hasNext()) { Row row = rowIterator.next(); // System.out.println(row.getRowNum()); Iterator<Cell> cellIterator = row.cellIterator(); while (cellIterator.hasNext()) { Cell cell = cellIterator.next(); if(row.getRowNum() > -1){ //To filter column headings if(cell.getColumnIndex() == columnIndex){// To match column index switch (cell.getCellType()) { case Cell.CELL_TYPE_NUMERIC: columndata.add(cell.getNumericCellValue()+""); break; case Cell.CELL_TYPE_STRING: columndata.add(cell.getStringCellValue()); break; } } } } } ios.close(); System.out.println(colName); for(String ele : columndata) { System.out.println(ele); } } catch (Exception e) { e.printStackTrace(); } return columndata; } } 

提前致谢！