用java

Question

上的Excel數據表執行操作有在excel表四列

1. 我需要在三列執行操作和顯示在第四個結果。
2. Image with data in excel
3. 如果我執行B9-D9，那麼結果等於C9。
4. 發生這種情況時，輸出應爲「匹配」。

5. 我需要知道如何訪問每個行和列並對其執行必要的操作。 看看你是否可以幫助我，讓我知道是否需要任何額外的細節。

   package com.infy; 
   
   import java.io.File; 
   import java.io.FileInputStream; 
   import java.io.FileNotFoundException; 
   import java.io.IOException; 
   import java.util.Iterator; 
   
   
   
   import org.apache.poi.ss.usermodel.Cell; 
   import org.apache.poi.ss.usermodel.Row; 
   import org.apache.poi.ss.usermodel.Sheet; 
   import org.apache.poi.ss.usermodel.Workbook; 
   import org.apache.poi.xssf.usermodel.XSSFWorkbook; 
   
   
   public class ReconMatch { 
       public static void main(String[] args) throws IOException, 
   FileNotFoundException{ 
        // TODO Auto-generated method stub 
        String excelFilePath ="C:/Users/akshay.kuchankar/Documents/demo.xlsx"; 
        FileInputStream inputStream = new FileInputStream(new 
   File(excelFilePath)); 
   
        Workbook workbook = new XSSFWorkbook(inputStream); 
        Sheet firstSheet = workbook.getSheetAt(0); 
        Iterator<Row> iterator = firstSheet.iterator(); 
   
        while (iterator.hasNext()) { 
         Row nextRow = iterator.next(); 
         Iterator<Cell> cellIterator = nextRow.cellIterator(); 
   
         while (cellIterator.hasNext()) { 
          Cell cell = cellIterator.next(); 
   
          //what should be the basic approach or the syntax to perform the operaiton?? 
         } 
         System.out.println(); 
         } 
         workbook.close(); 
         inputStream.close(); 
   
        } 
   
       } 
   

   ---

   for(int i= 0; i<firstSheet.getRow(0).getCell(0).getNumericCellValue(); i++) 
         { 
   
          FGAmount = firstSheet.getRow(1).getCell(1).getNumericCellValue(); 
          // System.out.println(FGAmount); 
          difference = firstSheet.getRow(1).getCell(3).getNumericCellValue(); 
          value = FGAmount + difference; 
   
         } 
           alconAmount = firstSheet.getRow(1).getCell(2).getNumericCellValue(); 
   
        //   result = firstSheet.getRow(1).getCell(4).getStringCellValue(); 
   
        }    
       } 
       try { 
        if(value== alconAmount){ 
         firstSheet.getRow(1).getCell(4).setCellValue("Manual Matched"); 
         System.out.println("matched"); 
        }      
   
       } catch (Exception e) { 
        e.printStackTrace(); 
        System.out.println(e); 
       } 
       // System.out.println(result); 
   
       workbook.close(); 
       inputStream.close(); 
   

Answer 1

看看該API爲您的圖書館：

https://poi.apache.org/apidocs/org/apache/poi/ss/usermodel/Cell.html

您可以在許多方面的細胞，例如互動： cell.setCellValue("My new value");

至於如何獲取值形成細胞和核對他們，你可以做一些事情，有點像這個例子中，我們做了一下數學和比較值：

//Value of row 9, column 1 (column B) 
String B9 = firstSheet.getRow(9).getCell(1).getStringCellValue(); 

//Value of row 9, column 2 (column C) 
String D9 = firstSheet.getRow(9).getCell(2).getStringCellValue(); 

//Value of row 9, column 3 (column D) 
String D9 = firstSheet.getRow(9).getCell(3).getStringCellValue(); 

//do math B9 - D9 
double value = Double.parseDouble(B9) - Double.parseDouble(D9); 

//check if C9 matches the result of B9 - D9 
if(value == Double.parseDouble(C9)) 
{ 
    //if it matches set cell E9 to display "Matched" and print out a message 
    firstSheet.getRow(9).getCell(4).setCellValue("matched"); 
    System.out.println("matched"); 
} 

我沒有測試此代碼，但它應該指向正確的方向。

顯然有一些事情是你應該做的像把這個在一個循環中，而不是硬編碼值，也應檢查列名的確保你獲得你的價值觀前右列，然後你應該檢查該單元格是一個數字，而不是文字等。

---

編輯回覆您的評論。這裏是一些代碼，將在表格中除第1行以外的每一行都執行，並且將執行與上述示例中完全相同的操作，如果列B - 列D等於列C，則在E列中寫入「匹配」：

Iterator<Row> iterator = firstSheet.iterator(); 

while (iterator.hasNext()) { 
    Row nextRow = iterator.next(); 

    //Check to make sure we skip the first row because that has all the column names: 
    if (nextRow.getRowNum() != 0){ 
     //Get cell values of the current row 
     String columnB = nextRow.getCell(1).getStringCellValue(); 
     String columnC = nextRow.getCell(2).getStringCellValue(); 
     String columnD = nextRow.getCell(3).getStringCellValue(); 

     try{ 
      //do math column B - column D 
      double value = Double.parseDouble(columnB) - Double.parseDouble(columnD); 

      //check if column C matches the result of (column B - column D) 
      if(value == Double.parseDouble(columnC)){ 
       //if it matches set text in column E to "matched" 
       nextRow.getCell(4).setCellValue("matched"); 
       //print to console showing if a row matched 
       System.out.println("Row " + (nextRow.getRowNum()+1) + " matched"); 
      } 
     } 
     catch(NumberFormatException nfe){ 
      //do nothing here, this will happen if a cell contains text instead of numbers 
     } 
     catch(NullPointerException npe){ 
      //Something else happened, you can probably ignore this as well but it will pay to throw a stack trace just in case something is wrong with this code 
      npe.printStackTrace(); 
     } 
    } 
}