使用JAVA apache poi从xlsx读取数据无法读取行的最后一个单元格

Question

Below is the code to read data from 9 excel cells.

Excel data format is at the end of code. It has two rows. It never reads the last cells data,tried all the combinations

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

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class Exceldata {
public static XSSFWorkbook workbook = null;
public static XSSFSheet sheet = null;
public static XSSFRow row = null;
public static XSSFCell cell = null;
public static  String[] col_name= new String[9];
public static String[][] user_data=new String[2][9];

public static void main(String[] args) {
try {
 File src= new File("C:\\Users\\Public\\Testdata.xlsx");
 FileInputStream fis=new FileInputStream(src);
 XSSFWorkbook book= new XSSFWorkbook(fis);         
 XSSFSheet sheet_userdata= book.getSheet("UserDetails");          
 for(int p=0;p<book.getNumberOfSheets();p++) 
 {
  System.out.println("Sheet Name is : "+ book.getSheetName(p));
  }
 row=sheet_userdata.getRow(0);
 for(int j =0;j<9;j++) 
 {
  cell=row.getCell(j);
  col_name[j]=String.valueOf(cell.getStringCellValue());
  System.out.println(col_name[j]);
  }
   //Read  data from cells
  for(int i=0;i<sheet_userdata.getLastRowNum();i++)
  {
  row=sheet_userdata.getRow(i+1);
  for(int k=0;k<9;k++) 
{
  if((cell=row.getCell(k))!= null) 
 {
  switch(cell.getCellType())
{
 case Cell.CELL_TYPE_STRING:
   if(k==1) 
 {
 user_data[i][k]=String.valueOf(cell.getStringCellValue());
 System.out.println(col_name[k]+" is : ");
 System.out.println(user_data[i][k]);
 }else if(k==2)
{
 user_data[i][k]=String.valueOf(cell.getStringCellValue());
 System.out.println(col_name[k]+" is : ");
 System.out.println(user_data[i][k]);
}
 else if(k==3) 
{
 user_data[i][k]=String.valueOf(cell.getStringCellValue());
 System.out.println(col_name[k]+" is : ");
 System.out.println(user_data[i][k]);
}
else if(k==5) 
{
 user_data[i][k]=String.valueOf(cell.getStringCellValue());
 System.out.println(col_name[k]+" is : ");
 System.out.println(user_data[i][k]);
 }
else if(k==6) 
{
 user_data[i][k]=String.valueOf(cell.getStringCellValue());
 System.out.println(col_name[k]+" is : ");
 System.out.println(user_data[i][k]);
 }
else if(k==7) 
{
 user_data[i][k]=String.valueOf(cell.getStringCellValue());
 System.out.println(col_name[k]+" is : ");
 System.out.println(user_data[i][k]);
 }
 else if(k==8) 
{
  user_data[i][k]=String.valueOf((cell.getStringCellValue()));
System.out.println(col_name[k]+" is : ");
System.out.println(user_data[i][k]);
}
break;
case Cell.CELL_TYPE_NUMERIC:
 if(k==0) 
{
 user_data[i][k]=String.valueOf((long)(cell.getNumericCellValue()));
 System.out.println(col_name[k]+" is : ");                                        
 System.out.println(user_data[i][k]);                                                                              
 }
else if(k==4) 
{
 user_data[i][k]=String.valueOf((long)(cell.getNumericCellValue()));
 System.out.println(col_name[k]+" is : ");
 System.out.println(user_data[i][k]);
 }
break;
 case Cell.CELL_TYPE_BOOLEAN:
user_data[i][k]=cell.getStringCellValue();
System.out.println(user_data[i][k]);
 break;
case Cell.CELL_TYPE_BLANK:
 //user_data[i][k]="";
if(k==8) 
{
 user_data[i][k]=String.valueOf((cell.getStringCellValue()));
 System.out.println(col_name[k]+" is : ");
 System.out.println(user_data[i][k]);
}
break;
case Cell.CELL_TYPE_FORMULA:
  user_data[i][k]=String.valueOf(cell.getCellFormula());
 System.out.println(user_data[i][k]);
 break;
 case Cell.CELL_TYPE_ERROR:
user_data[i][k]=String.valueOf(cell.getErrorCellString());
 System.out.println(user_data[i][k]);
 break;
}
}
}
}
}catch(Exception e) 
{
e.printStackTrace();
}
                                                            
                                            
 }

 }

XLS sheet data has two rows like this( NOte : Status cell is empty)

S.No.| ID |First Name |Last Name |Contact number |Email id |Usermode |channel |Status 1 test@test.com Ram singh 45455666 xyz@test.com Password XYZ empty cell

Answer 1

Option 1 you have checked cell null condition but not "" this condition.There might be chances that if you have added data manually to excel sheet that cell is not BLANK and have some space etc. Try to Add this

if((row.getCell(k))!= ""){
//now check column is 8
if(k==8)

Option 2 That cell type might be UNKNOWN so add this case as well

case Cell.CellType _NONE 

Option 3 Your are expecting that cell type as blank but it could be either numeric or string so try to add K==8 condition in both of this switch case or find out specific type of that cell first.

Answer 2

实际上，当使用 getcell(int k); 时，当单元格为空或空或没有值时，它会给出 NULL 指针异常；因此，解决方案是在 if((cell=row.getCell(k))!=null) 之前添加一行以将 null 转换为空白，如下所示 cell=row.getcell(k,row.CREATE_NULL_AS_BLANK)。