用java

Question

上的Excel数据表执行操作有在excel表四列

1. 我需要在三列执行操作和显示在第四个结果。
2. Image with data in excel
3. 如果我执行B9-D9，那么结果等于C9。
4. 发生这种情况时，输出应为“匹配”。

5. 我需要知道如何访问每个行和列并对其执行必要的操作。 看看你是否可以帮助我，让我知道是否需要任何额外的细节。

   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

看看该API为您的图书馆：

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

您可以在许多方面的细胞，例如互动： cell.setCellValue("My new value");

至于如何获取值形成细胞和核对他们，你可以做一些事情，有点像这个例子中，我们做了一下数学和比较值：

//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"); 
} 

我没有测试此代码，但它应该指向正确的方向。

显然有一些事情是你应该做的像把这个在一个循环中，而不是硬编码值，也应检查列名的确保你获得你的价值观前右列，然后你应该检查该单元格是一个数字，而不是文字等。

---

编辑回复您的评论。这里是一些代码，将在表格中除第1行以外的每一行都执行，并且将执行与上述示例中完全相同的操作，如果列B - 列D等于列C，则在E列中写入“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(); 
     } 
    } 
}