工作总结 npoi 模板 导出公式 excel

Apache POI(5):公式(formula)

Apache POI(5):公式(formula)

2016年08月01日 17:44:49

阅读数：1145

1.  
   package com.hthk.iisz.util;
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3.  
   import java.io.File;
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   import java.io.FileOutputStream;
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6.  
   import org.apache.poi.xssf.usermodel.XSSFCell;
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   import org.apache.poi.xssf.usermodel.XSSFRow;
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   import org.apache.poi.xssf.usermodel.XSSFSheet;
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   import org.apache.poi.xssf.usermodel.XSSFWorkbook;
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11.  
    public class FormulaTest {
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    public static void main(String[] args) throws Exception {
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    formula();
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    }
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    public static void formula() throws Exception {
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    XSSFWorkbook workbook = new XSSFWorkbook();
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    XSSFSheet sheet = workbook.createSheet("formula");
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    XSSFRow row = sheet.createRow(1);
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    XSSFCell cell = row.createCell(1);
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    cell.setCellValue("A =");
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    cell = row.createCell(2);
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    cell.setCellValue(2);
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    row = sheet.createRow(2);
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    cell = row.createCell(1);
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    cell.setCellValue("B =");
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    cell = row.createCell(2);
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    cell.setCellValue(4);
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    row = sheet.createRow(3);
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    cell = row.createCell(1);
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    cell.setCellValue("Total =");
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    cell = row.createCell(2);
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    // create sum formula
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    cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);
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    cell.setCellFormula("SUM(C2:C3)");
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    cell = row.createCell(3);
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    cell.setCellValue("SUM(C2:C3)");
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    row = sheet.createRow(4);
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    cell = row.createCell(1);
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    cell.setCellValue("POWER =");
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    cell = row.createCell(2);
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    // create power formula
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    cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);
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    cell.setCellFormula("POWER(C2,C3)");
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    cell = row.createCell(3);
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    cell.setCellValue("POWER(C2,C3)");
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    row = sheet.createRow(5);
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    cell = row.createCell(1);
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    cell.setCellValue("MAX =");
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    cell = row.createCell(2);
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    // Create MAX formula
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    cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);
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    cell.setCellFormula("MAX(C2,C3)");
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    cell = row.createCell(3);
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    cell.setCellValue("MAX(C2,C3)");
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    row = sheet.createRow(6);
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    cell = row.createCell(1);
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    cell.setCellValue("FACT =");
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    cell = row.createCell(2);
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    // Create FACT formula
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    cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);
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    cell.setCellFormula("FACT(C3)");
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    cell = row.createCell(3);
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    cell.setCellValue("FACT(C3)");
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    row = sheet.createRow(7);
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    cell = row.createCell(1);
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    cell.setCellValue("SQRT =");
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    cell = row.createCell(2);
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    // Create SQRT formula
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    cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);
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    cell.setCellFormula("SQRT(C5)");
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    cell = row.createCell(3);
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    cell.setCellValue("SQRT(C5)");
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    workbook.getCreationHelper().createFormulaEvaluator().evaluateAll();
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    FileOutputStream out = new FileOutputStream(new File("formula.xlsx"));
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    workbook.write(out);
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    out.close();
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    System.out.println("fromula.xlsx written successfully");
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    }
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87.  
    }

效果截图

 

 

cell.SetCellType(CellType.FORMULA);

sheet.ForceFormulaRecalculation = true;

1.使用cell.setCellFormula方法重新在制定Cell里写入公式。

2.使用sheet.setForceFormulaRecalculation(true);方法强制让改Sheet执行公式。

EvaluateFormulaCell

#region 插入块
int rowsindex = 0;
for (int i = 0; i < lastarea.Count - 1; i++)
{
int tj = rowsindex + 70;
for (; rowsindex < tj; rowsindex++)
{
sheet.CreateRow(rowsindex + 70);   //有些行为null  统一创建一下
sheet.CopyRow(rowsindex, rowsindex + 70);
}
}
#endregion

//统计
if ((HSSFCell)sheet.GetRow(dataarea + 40).GetCell(3) == null) //一个道理 为空 创建
{
ICell cell = (HSSFCell)sheet.GetRow(dataarea + 40).CreateCell(3);
}
((HSSFCell)sheet.GetRow(dataarea + 40).GetCell(3)).SetCellType(CellType.FORMULA); //设置表达式格式

//((HSSFRow)sheet.GetRow(dataarea + 40)).GetCell(3).SetCellValue("=SUM(D" + (dataarea + 1) + ":D" + (dataarea + 40) + ")");
((HSSFRow)sheet.GetRow(dataarea + 40)).GetCell(3).SetCellFormula("SUM(D" + (dataarea + 1) + ":D" + (dataarea + 40) + ")"); //设置表达式的值 不用=