Question

我已经阅读了与我类似的其他问题，但我错过了一些内容，因为我的行都没有被删除...经过多次尝试后，我已经结束了以下代码..

我想删除除第1行以外的所有行，这就是计数器从1开始的原因......

//...
FileInputStream file = new FileInputStream(new File("E:\\products.xls"));
HSSFWorkbook workbook = new HSSFWorkbook(file);
HSSFSheet sheet = workbook.getSheetAt(0);

for(int i=1; i<= sheet.getLastRowNum(); i++){
    Row row = sheet.getRow(i);
    deleteRow(sheet, row);
}

file.close();
FileOutputStream outFile = new FileOutputStream(new File("E:\\products.xls"));
workbook.write(outFile);
outFile.close();
//...


//The delete method...
private void deleteRow(HSSFSheet sheet, Row row) {
    int lastRowNum = sheet.getLastRowNum();
    int rowIndex = row.getRowNum();
    if(rowIndex >= 0 && rowIndex < lastRowNum){
        sheet.shiftRows(rowIndex + 1, lastRowNum, -1);
    }
    if(rowIndex == lastRowNum){
        Row removingRow = sheet.getRow(rowIndex);
        if(removingRow != null){
            sheet.removeRow(removingRow);
             System.out.println("Deleting.... ");
        }
    }
}

我没有收到任何错误，但没有删除任何行。

更新

如下所述，我没有保存文件...我更新了上面的代码，现在我保存了它！但是，我的一些行被删除而不是所有行... 任何想法为什么会发生这种情况？

Answer 1

Yuor代码完美无缺，只缺少一件事：将结果写入文件......

wb.write(new FileOutputStream(new File("E:\\products.xls")));

完整的工作示例：

    import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Row;


public class Main {

    public Main() {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args)  throws IOException {
        FileInputStream file = null;
        HSSFWorkbook wb = null;
        FileOutputStream out = null;
    try{
         file = new FileInputStream(new File("E:\\products.xls"));

         wb = new HSSFWorkbook(file);
        HSSFSheet sheet = wb.getSheetAt(0);

        for(int i=1; i<= sheet.getLastRowNum(); i++){
            Row row = sheet.getRow(i);
            deleteRow(sheet, row);
        }

         out = new FileOutputStream(new File("E:\\products.xls"));
        wb.write(out);


    }
    catch(Exception e){}
    finally{
        if(file!=null)
        file.close();
        if(out!=null)
        out.close();
        if(wb!=null)
        wb.close();
    }

    }
        public static void deleteRow(HSSFSheet sheet, Row row) {
            int lastRowNum = sheet.getLastRowNum();
            int rowIndex = row.getRowNum();
            if(rowIndex >= 0 && rowIndex < lastRowNum){
                sheet.shiftRows(rowIndex + 1, lastRowNum, -1);
            }
            if(rowIndex == lastRowNum){
                Row removingRow = sheet.getRow(rowIndex);
                if(removingRow != null){
                    sheet.removeRow(removingRow);
                     System.out.println("Deleting.... ");
                }    
        }
    }

}

您的代码中唯一的问题是，它不是您对方法的期望 deleteRow（..）我以这种方式修改了您的方法：

public static void deleteRow(HSSFSheet sheet, Row row) {
            int lastRowNum = sheet.getLastRowNum();     
            if(lastRowNum !=0 && lastRowNum >0){
                int rowIndex = row.getRowNum();
                Row removingRow = sheet.getRow(rowIndex);
                if(removingRow != null){
                    sheet.removeRow(removingRow);
                     System.out.println("Deleting.... ");
                }    
        }
    }

如果文件中只有一行，则不会删除，如果还有，则删除除第一行以外的所有行。

Answer 2

你忘了显然保存你的工作簿......

Function Test() As Boolean
    Dim X As Integer
    X = 5

    Return (X = 10)
End Function

Answer 3

我想你忘了保存更改。

删除除第一个 - Java POI之外的所有行

3 个答案: