HSSF是POI工程对Excel 97(-2007)文件操作的纯Java实现
XSSF是POI工程对Excel 2007 OOXML (.xlsx)文件操作的纯Java实现在POI中有HSSFPatriarch对象，该对象为画图的顶级管理器，它的createPicture(anchor, pictureIndex)方法就能够在Excel插入一张图片。
针对.xls文件导出图片
public class ExcelImageTest { public static void main(String[] args) { FileOutputStream fileOut = null; BufferedImage bufferImg = null; //先把读进来的图片放到一个ByteArrayOutputStream中，以便产生ByteArray try { ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream(); bufferImg = ImageIO.read(new File("E:/测试图片.jpg")); ImageIO.write(bufferImg, "jpg", byteArrayOut); HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet sheet1 = wb.createSheet("test picture"); //画图的顶级管理器，一个sheet只能获取一个（一定要注意这点） HSSFPatriarch patriarch = sheet1.createDrawingPatriarch(); //anchor主要用于设置图片的属性 HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 255, 255,(short) 1, 1, (short) 5, 8); //注意：这个方法在新版本的POI中参数类型改成了（AnchorType anchorType） anchor.setAnchorType(3); //插入图片 patriarch.createPicture(anchor, wb.addPicture(byteArrayOut.toByteArray(), HSSFWorkbook.PICTURE_TYPE_JPEG)); fileOut = new FileOutputStream("D:/测试Excel.xls"); // 写入excel文件 wb.write(fileOut); System.out.println("----Excle文件已生成------"); } catch (Exception e) { e.printStackTrace(); }finally{ if(fileOut != null){ try { fileOut.close(); } catch (IOException e) { e.printStackTrace(); } } } }} 
本项目导入的POI版本是poi-3.11-20141221.jar，setAnchorType(int anchorType)
工具方法
//插入某个图片到指定索引的位置 private static void insertImage(HSSFWorkbook wb,HSSFPatriarch pa,byte[] data,int row,int column,int index){ //单元格为标,以左上为起点,向右移,范围0-1023 dx1 must be between 0 and 1023 int x1=0; //单元格为标,以左上为起点,向下移,范围0-1023 dy1 must be between 0 and 255 int y1=0; //单元格为标,以右上为起点,向右移,范围0-1023 dx1 must be between 0 and 1023 int x2=100; //单元格为标,以右下为起点,向下移,范围0-1023 dy1 must be between 0 and 255 int y2=22; //后面四个参数表示图片左上角和右下角的坐标 //col1 图片的左上角放在第几个列cell， // row1 图片的左上角放在第几个行cell， // col2 图片的右下角放在第几个列cell，
// row2 图片的右下角放在第几个行cell，HSSFClientAnchor anchor = new HSSFClientAnchor(x1,y1,x2,y2,(short)column,row,(short)column,row); anchor.setAnchorType(3); pa.createPicture(anchor , wb.addPicture(data,HSSFWorkbook.PICTURE_TYPE_JPEG)); }
针对.xlsx导出Excel图片
package com.org.apache.poi.xssf;import java.awt.image.BufferedImage;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import javax.imageio.ImageIO;import org.apache.poi.xssf.usermodel.XSSFClientAnchor;import org.apache.poi.xssf.usermodel.XSSFDrawing;import org.apache.poi.xssf.usermodel.XSSFSheet;import org.apache.poi.xssf.usermodel.XSSFWorkbook;public class StartPoiExcelWriterImg { public static void main(String[] args) { FileOutputStream fileOut = null; BufferedImage bufferImg = null; //先把读进来的图片放到一个ByteArrayOutputStream中，以便产生ByteArray try { ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream(); bufferImg = ImageIO.read(new File("D:/测试图片.jpg")); ImageIO.write(bufferImg, "jpg", byteArrayOut); XSSFWorkbook wb = new XSSFWorkbook(); XSSFSheet sheet1 = wb.createSheet("Sheet1"); //XSSFSheet sheet1 = wb.getSheet("Sheet1"); //画图的顶级管理器，一个sheet只能获取一个（一定要注意这点） XSSFDrawing patriarch = sheet1.createDrawingPatriarch(); //anchor主要用于设置图片的属性 XSSFClientAnchor anchor = new XSSFClientAnchor(0, 0, 255, 255,(short) 1, 1, (short) 5, 8); anchor.setAnchorType(3); //插入图片 patriarch.createPicture(anchor, wb.addPicture(byteArrayOut.toByteArray(), XSSFWorkbook.PICTURE_TYPE_JPEG)); fileOut = new FileOutputStream("C:\\Users\\huage\\Desktop\\121231\\11111.xlsx"); // 写入excel文件 wb.write(fileOut); System.out.println("----Excle文件已生成------"); } catch (Exception e) { e.printStackTrace(); }finally{ if(fileOut != null){ try { fileOut.close(); } catch (IOException e) { e.printStackTrace(); } } } } }