如何将图像放在excel的单元格中？ [英] How put a image in a cell of excel java?

问题描述

I have tried to put an image into an Excel cell with java but without much success this is the code I was working but the only thing I've done is put the image on excel sheet but not in a cell specified

XSSFWorkbook wb = new XSSFWorkbook();
Sheet sheet = wb.createSheet("My Sample Excel");
//FileInputStream obtains input bytes from the image file
InputStream inputStream = new FileInputStream("C:/images/logo.png");
//Get the contents of an InputStream as a byte[].
byte[] bytes = IOUtils.toByteArray(inputStream);
//Adds a picture to the workbook
int pictureIdx = wb.addPicture(bytes, Workbook.PICTURE_TYPE_PNG);
//close the input stream
inputStream.close();
//Returns an object that handles instantiating concrete classes
CreationHelper helper = wb.getCreationHelper();
//Creates the top-level drawing patriarch.
Drawing drawing = sheet.createDrawingPatriarch();
//Create an anchor that is attached to the worksheet
ClientAnchor anchor = helper.createClientAnchor();
anchor.setCol1(1);
anchor.setRow1(2);
//Creates a picture
Picture pict = drawing.createPicture(anchor, pictureIdx);
//Reset the image to the original size
pict.resize();
//Write the Excel file
FileOutputStream fileOut = null;
fileOut = new FileOutputStream("C:/data/myFile.xlsx");
wb.write(fileOut);
fileOut.close();

推荐答案

您正在做的是将图像与锚点到左上方单元格 B3 （ anchor.setCol1（1）; anchor.setRow1（2）; ）。然后，您已经将图像的大小调整为原始大小。

What you are doing already is positioning the image with the anchor to upper left cell B3 (anchor.setCol1(1);anchor.setRow1(2);). Then you already resize the image to it's native size.

如果图像适合单元格 B3 ，那么您必须创建一个左上角的单元格和右下角单元格。而且您不得将图像的大小调整为原始大小。

If the image shall fit into the cell B3 then you must create an anchor with upper left cell and bottom right cell. And you must not resize the image to it's native size.

示例：

import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.usermodel.*;

import org.apache.poi.util.IOUtils;

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


class ImageTest {

 public static void main(String[] args) {
  try {

   Workbook wb = new XSSFWorkbook();
   Sheet sheet = wb.createSheet("My Sample Excel");
   //FileInputStream obtains input bytes from the image file
   InputStream inputStream = new FileInputStream("/home/axel/Bilder/Wasserlilien.jpg");
   //Get the contents of an InputStream as a byte[].
   byte[] bytes = IOUtils.toByteArray(inputStream);
   //Adds a picture to the workbook
   int pictureIdx = wb.addPicture(bytes, Workbook.PICTURE_TYPE_PNG);
   //close the input stream
   inputStream.close();
   //Returns an object that handles instantiating concrete classes
   CreationHelper helper = wb.getCreationHelper();
   //Creates the top-level drawing patriarch.
   Drawing drawing = sheet.createDrawingPatriarch();

   //Create an anchor that is attached to the worksheet
   ClientAnchor anchor = helper.createClientAnchor();

   //create an anchor with upper left cell _and_ bottom right cell
   anchor.setCol1(1); //Column B
   anchor.setRow1(2); //Row 3
   anchor.setCol2(2); //Column C
   anchor.setRow2(3); //Row 4

   //Creates a picture
   Picture pict = drawing.createPicture(anchor, pictureIdx);

   //Reset the image to the original size
   //pict.resize(); //don't do that. Let the anchor resize the image!

   //Create the Cell B3
   Cell cell = sheet.createRow(2).createCell(1);

   //set width to n character widths = count characters * 256
   //int widthUnits = 20*256;
   //sheet.setColumnWidth(1, widthUnits);

   //set height to n points in twips = n * 20
   //short heightUnits = 60*20;
   //cell.getRow().setHeight(heightUnits);

   //Write the Excel file
   FileOutputStream fileOut = null;
   fileOut = new FileOutputStream("myFile.xlsx");
   wb.write(fileOut);
   fileOut.close();

  } catch (IOException ioex) {
  }
 }
}

如果您从程序行中删除注释符号

If you remove the comment signs form the program rows

...
   //set width to n character widths = count characters * 256
   int widthUnits = 20*256;
   sheet.setColumnWidth(1, widthUnits);

   //set height to n points in twips = n * 20
   short heightUnits = 60*20;
   cell.getRow().setHeight(heightUnits);
...

您可以调整单元格大小 B3 ，因此图像大小调整。

you can resize the cell B3 and so the image resizes.

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