java - 在 POI 中过滤 Excel 中的列时删除考虑空白

Question

您好，我正在使用 autoFilter 过滤 Excell 中的所有列，它在过滤时会考虑所有空白行(超出具有数据的行总数的行)。但是，我想在尝试过滤任何列时避免考虑空白行。

我正在使用下面的代码，sheet.setAutoFilter(CellRangeAddress.valueOf("A8:L13"));

我现在是这样的

我需要这样

Answer 1

AutoFilter [ ] (Blanks) 选项仅在筛选范围内没有空白单元格时才会消失。所以我们只需要将自动筛选单元格范围设置为已使用的范围。

例子:

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

import java.util.Random;
import java.io.*;

class AutoFilterTest {

 private static void setCellData(Sheet sheet) {

  Row row = sheet.createRow(0);
  Cell cell = row.createCell(0);
  cell.setCellValue("Name");
  cell = row.createCell(1);
  cell.setCellValue("Value1");
  cell = row.createCell(2);
  cell.setCellValue("Value2");
  cell = row.createCell(3);
  cell.setCellValue("City");

  Random rnd = new Random();

  for (int r = 1; r < 10 + rnd.nextInt(100); r++) {
   row = sheet.createRow(r);
   cell = row.createCell(0);
   cell.setCellValue("Name " + ((r-1) % 4 + 1));
   cell = row.createCell(1);
   cell.setCellValue(r * rnd.nextDouble());
   cell = row.createCell(2);
   cell.setCellValue(r * rnd.nextDouble());
   cell = row.createCell(3);
   cell.setCellValue("City " + ((r-1) % 3 + 1));  
  }

 }

 public static void main(String[] args) {
  try {
   XSSFWorkbook wb = new XSSFWorkbook();
   XSSFSheet sheet = wb.createSheet();

   //create random rows of data
   setCellData(sheet);

   for (int c = 0; c < 4; c++) sheet.autoSizeColumn(c);

   int lastRow = sheet.getLastRowNum();
   sheet.setAutoFilter(new CellRangeAddress(0, lastRow, 0, 3));

   wb.write(new FileOutputStream("AutoFilterTest.xlsx"));
   wb.close();
  } catch (Exception e) {
    e.printStackTrace();
  }
 }
}