计算Excel工作表列中的行数(提供的Java代码)

Question

参考我之前的问题如何使用Java i计算Excel文档列中的行数能够计算给定工作表中的总列数.现在,有一半的工作尚未完成,因为我想计算特定列中的行数.可能的解决方案可能是使用2d数组并存储列索引和总行数或使用地图等.我怎么能实现这一点？这里提供了Java代码.我正在为我的演示文件计算正确的数量(列数).请根据需要修改/建议更改.

(编辑):我使用hasp map计算存储列索引作为键,行计数作为值,但它不工作,可能是应用逻辑错误.好吧,如果我想通过使用哈希映射来实现这一点,我如何将特定列中的行数(在迭代时)存储为值

Java代码:

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;

import org.apache.poi.ss.formula.functions.Column;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelRead {
    static int colrange=1000;
    public static void main(String[] args) {
        HashMap hm=new HashMap();
        int count=0;
    try {
        FileInputStream file = new FileInputStream(new File("C:/Users/vinayakp/Desktop/Demo2.xlsx"));
        XSSFWorkbook workbook = new XSSFWorkbook(file);
        XSSFSheet sheet = workbook.getSheetAt(0);
        Iterator<Row> rowIterator = sheet.iterator();
        while(rowIterator.hasNext()) {
            Row row = rowIterator.next();
            Iterator<Cell> cellIterator = row.cellIterator();
            while(cellIterator.hasNext()) {
                Cell cell = cellIterator.next();
                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;
                }
            }
            System.out.println("");
        }

        for(Row r:sheet)
        {
            short minColIx=r.getFirstCellNum();
            short maxColIx=r.getLastCellNum();
            for(short colIx=minColIx;colIx<maxColIx;colIx++) {
                Cell c= r.getCell(colIx);
                if(c!=null) {
                    if(c.getCellType()== Cell.CELL_TYPE_STRING||c.getCellType() == Cell.CELL_TYPE_NUMERIC||c.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
                        count++; ---// can i use hashcode in here to get the key and value pair? key=column index value=total number of rows in that column
                            } 
                    }
                    else break;
                }
            }

        System.out.println("\nTotal Number of columns are:\t"+count);
        System.out.println(hm);
        file.close();    
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException ae) {
        ae.printStackTrace();
    }
}
}

Answer 1

试试这个:

private void excelReader() {
    String data;
    try {
        InputStream is = new FileInputStream("Read.xlsx");
        Workbook wb = WorkbookFactory.create(is);
        Sheet sheet = wb.getSheetAt(0);
        Iterator rowIter = sheet.rowIterator();
        Row r = (Row)rowIter.next();
        short lastCellNum = r.getLastCellNum();
        int[] dataCount = new int[lastCellNum];
        int col = 0;
        rowIter = sheet.rowIterator();
        while(rowIter.hasNext()) {
            Iterator cellIter = ((Row)rowIter.next()).cellIterator();
            while(cellIter.hasNext()) {
                Cell cell = (Cell)cellIter.next();
                col = cell.getColumnIndex();
                dataCount[col] += 1;
                DataFormatter df = new DataFormatter();
                data = df.formatCellValue(cell);
                System.out.println("Data: " + data);
            }
        }
        is.close();
        for(int x = 0; x < dataCount.length; x++) {
            System.out.println("col " + x + ": " + dataCount[x]);
        }
    }
    catch(Exception e) {
        e.printStackTrace();
        return;
    }
}

经过测试的代码

我创建了一个包含以下单元格数据的xlsx文件:

Col0    Col1    Col2    Col3    Col4
1       a       x       a       q
2       b       y       s       w
3       c       z       d       e
4       d               f       r
5       e                       t
                                y

dataCount数组的内容是这样的:

col 0:6

第1:6列

第2:4

3:5

4:7

右侧的数字计算每列的数据单元格数,包括标题行.

如果要排除标题行,只需删除该行:

rowIter = sheet.rowIterator();

就在while循环之前.

这是你想要的？