首项需要的jar包有：
1.poi-3.8-20120326.jar2.commons-codec-1.10.jar
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代码： package com.demo; 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.hssf.usermodel.HSSFClientAnchor; import org.apache.poi.hssf.usermodel.HSSFPatriarch; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; public class POI { public static void main(String[] args) { FileOutputStream fileOut = null; BufferedImage bufferImg = null;//图片一 BufferedImage bufferImg1 = null;//图片二 try { // 先把读进来的图片放到一个ByteArrayOutputStream中，以便产生ByteArray ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream(); ByteArrayOutputStream byteArrayOut1 = new ByteArrayOutputStream(); //将两张图片读到BufferedImage bufferImg = ImageIO.read(new File("C:/person.png")); bufferImg1 = ImageIO.read(new File("C:/person.png")); ImageIO.write(bufferImg, "png", byteArrayOut); ImageIO.write(bufferImg1, "png", byteArrayOut1); // 创建一个工作薄 HSSFWorkbook wb = new HSSFWorkbook(); //创建一个sheet HSSFSheet sheet = wb.createSheet("out put excel"); HSSFPatriarch patriarch = sheet.createDrawingPatriarch(); /** * 该构造函数有8个参数 * 前四个参数是控制图片在单元格的位置，分别是图片距离单元格left，top，right，bottom的像素距离 * 后四个参数，前连个表示图片左上角所在的cellNum和 rowNum，后天个参数对应的表示图片右下角所在的cellNum和 rowNum， * excel中的cellNum和rowNum的index都是从0开始的 * */ //图片一导出到单元格B2中 HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 0, 0, (short) , 1, (short) 2, 2); //图片二导出到单元格C3到E5中，且图片的left和top距离边框50 HSSFClientAnchor anchor1 = new HSSFClientAnchor(50, 50, 0, 0, (short) 2, 2, (short) 5, 5); // 插入图片 patriarch.createPicture(anchor, wb.addPicture(byteArrayOut .toByteArray(), HSSFWorkbook.PICTURE_TYPE_JPEG)); patriarch.createPicture(anchor1, wb.addPicture(byteArrayOut1 .toByteArray(), HSSFWorkbook.PICTURE_TYPE_JPEG)); fileOut = new FileOutputStream("C:/output_Excel.xls"); // 写入excel文件 wb.write(fileOut); } catch (IOException io) { io.printStackTrace(); System.out.println("io erorr : " + io.getMessage()); } finally { if (fileOut != null) { try { fileOut.close(); } catch (IOException e) { e.printStackTrace(); } } } } }
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这是最基本的向Excel插入图片,下一篇将会讲到项目中用到的数据和图片一起导出