poi导出excel包含图片，弹出页面下载框

首先添加有关的poi依赖jar包，如果是一个maven项目只需要在pom.xml中添加依赖。

  
           org.apache.poi
           poi
           3.15
      
      
     
          org.apache.poi
          poi-ooxml-schemas
          3.15
    
    
          org.apache.poi
          poi-ooxml
          3.15
    

然后示例的pom导出示例如下：

package com.cn.uk.robot.api.service;
import java.awt.Color;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.JOptionPane;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.ClientAnchor.AnchorType;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFComment;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.stereotype.Service;

import com.cn.uk.robot.api.model.EquRobot;

@Service
public class ExportExcelService {
	public void exportExcel(Collection dataset, OutputStream out) {
		exportExcel("异常识别点位", null, dataset, out, "yyyy-MM-dd");
	}

	public void exportExcel(String[] headers, Collection dataset,
			OutputStream out) {
		exportExcel("异常识别点位", headers, dataset, out, "yyyy-MM-dd");
	}

	public void exportExcel(String[] headers, Collection dataset,
			OutputStream out, String pattern) {
		exportExcel("异常识别点位", headers, dataset, out, pattern);
	}

	/**
	 * 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上
	 * 
	 * @param title
	 *            表格标题名
	 * @param headers
	 *            表格属性列名数组
	 * @param dataset
	 *            需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的
	 *            javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
	 * @param out
	 *            与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
	 * @param pattern
	 *            如果有时间数据，设定输出格式。默认为"yyy-MM-dd"
	 */
	
	public void exportExcel(String title, String[] headers,
			Collection dataset, OutputStream out, String pattern) {
		// 声明一个工作薄
		@SuppressWarnings("resource")
		XSSFWorkbook workbook = new XSSFWorkbook();
		// 生成一个表格
		XSSFSheet sheet = workbook.createSheet(title);
		// 设置表格默认列宽度为15个字节
		sheet.setDefaultColumnWidth((short) 15);
		// 生成一个样式
		XSSFCellStyle style = workbook.createCellStyle();
		// 设置这些样式
		style.setFillForegroundColor(new XSSFColor(Color.white));
		style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
		style.setBorderBottom(BorderStyle.THIN);
		style.setBorderLeft(BorderStyle.THIN);
		style.setBorderRight(BorderStyle.THIN);
		style.setBorderTop(BorderStyle.THIN);
		style.setAlignment(HorizontalAlignment.CENTER);
		// 生成一个字体
		XSSFFont font = workbook.createFont();
		font.setColor(new XSSFColor(Color.black));
		font.setFontHeightInPoints((short) 12);
		font.setBold(true);
		// 把字体应用到当前的样式
		style.setFont(font);
		// 生成并设置另一个样式
		XSSFCellStyle style2 = workbook.createCellStyle();
		style2.setFillForegroundColor(new XSSFColor(Color.white));
		style2.setFillPattern(FillPatternType.SOLID_FOREGROUND);
		style2.setBorderBottom(BorderStyle.THIN);
		style2.setBorderLeft(BorderStyle.THIN);
		style2.setBorderRight(BorderStyle.THIN);
		style2.setBorderTop(BorderStyle.THIN);
		style2.setAlignment(HorizontalAlignment.CENTER);
		style2.setVerticalAlignment(VerticalAlignment.CENTER);
		// 生成另一个字体
		XSSFFont font2 = workbook.createFont();
		font2.setBold(true);
		font2.setColor(new XSSFColor(Color.black));
		// 把字体应用到当前的样式
		style2.setFont(font2);
		// 声明一个画图的顶级管理器
		XSSFDrawing patriarch = sheet.createDrawingPatriarch();
	/*	// 定义注释的大小和位置,详见文档
		XSSFComment comment = patriarch.createCellComment(new XSSFClientAnchor(0,
				0, 0, 0, (short) 4, 2, (short) 6, 5));
		// 设置注释内容
		comment.setString(new XSSFRichTextString(""));
		// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
		comment.setAuthor("");*/
		// 产生表格标题行
		XSSFRow row = sheet.createRow(0);
		for (short i = 0; i < headers.length; i++) {
			XSSFCell cell = row.createCell(i);
			cell.setCellStyle(style);
			XSSFRichTextString text = new XSSFRichTextString(headers[i]);
			cell.setCellValue(text);
		}
		// 遍历集合数据，产生数据行
		Iterator it = dataset.iterator();
		int index = 0;
		while (it.hasNext()) {
			index++;
			row = sheet.createRow(index);
			T t = (T) it.next();
			// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
			Field[] fields = t.getClass().getDeclaredFields();
			for (short i = 0; i < fields.length; i++) {
				XSSFCell cell = row.createCell(i);
				cell.setCellStyle(style2);
				Field field = fields[i];
				String fieldName = field.getName();
				String getMethodName = "get"
						+ fieldName.substring(0, 1).toUpperCase()
						+ fieldName.substring(1);
				try {
					Class tCls = t.getClass();
					Method getMethod = tCls.getMethod(getMethodName,
							new Class[] {});
					Object value = getMethod.invoke(t, new Object[] {});
					// 判断值的类型后进行强制类型转换
					String textValue = null;
					if(value!=null) {
					System.out.println("输出值"+value.toString());
					}
					else {
						System.out.println("输出值null");	
					}
					// if (value instanceof Integer) {
					// int intValue = (Integer) value;
					// cell.setCellValue(intValue);
					// } else if (value instanceof Float) {
					// float fValue = (Float) value;
					// textValue = new HSSFRichTextString(
					// String.valueOf(fValue));
					// cell.setCellValue(textValue);
					// } else if (value instanceof Double) {
					// double dValue = (Double) value;
					// textValue = new HSSFRichTextString(
					// String.valueOf(dValue));
					// cell.setCellValue(textValue);
					// } else if (value instanceof Long) {
					// long longValue = (Long) value;
					// cell.setCellValue(longValue);
					// }
					 if (value instanceof Date) {
						Date date = (Date) value;
						SimpleDateFormat sdf = new SimpleDateFormat(pattern);
						textValue = sdf.format(date);
					} else if (value instanceof byte[]) {
						// 有图片时，设置行高为60px;
						row.setHeightInPoints(60);
						// 设置图片所在列宽度为80px,注意这里单位的一个换算
						sheet.setColumnWidth(i, (short) (35.7 * 80));
						// sheet.autoSizeColumn(i);
						byte[] bsValue = (byte[]) value;
						XSSFClientAnchor anchor = new XSSFClientAnchor(0, 0,
								102300000, 2550000, (short) i, index, (short) i, index);
						anchor.setAnchorType(AnchorType.MOVE_DONT_RESIZE);
						patriarch.createPicture(anchor, workbook.addPicture(
								bsValue, XSSFWorkbook.PICTURE_TYPE_JPEG));
					} else {
						if(value!=null) {
						textValue = value.toString();
						}
					}
					// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
					if (textValue != null) {
						Pattern p = Pattern.compile("^//d+(//.//d+)?$");
						Matcher matcher = p.matcher(textValue);
						if (matcher.matches()) {
							// 是数字当作double处理
							cell.setCellValue(Double.parseDouble(textValue));
						} else {
							XSSFRichTextString richString = new XSSFRichTextString(
									textValue);
							XSSFFont font3 = workbook.createFont();
							font3.setColor(new XSSFColor(Color.black));
							richString.applyFont(font3);
							cell.setCellValue(richString);
						}
					}
				} catch (SecurityException e) {
					e.printStackTrace();
				} catch (NoSuchMethodException e) {
					e.printStackTrace();
				} catch (IllegalArgumentException e) {
					e.printStackTrace();
				} catch (IllegalAccessException e) {
					e.printStackTrace();
				} catch (InvocationTargetException e) {
					e.printStackTrace();
				} finally {
					// 清理资源
				}
			}
		}
		try {
			workbook.write(out);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {
		// 测试学生
		ExportExcelService ex = new ExportExcelService();
		String[] headers = { "编号", "机器人名称", "类型", "性别", "出生日期" };
		List dataset = new ArrayList();
		EquRobot equRobot = new EquRobot();
		equRobot.setName("机器人一号");
		equRobot.setId(12);
		equRobot.setStationName("吉兰一号");
		dataset.add(equRobot);
		dataset.add(equRobot);
		dataset.add(equRobot);
		// 测试图书
		ExportExcelService ex2 = new ExportExcelService();
		String[] headers2 = { "图书编号", "图书名称", "图书作者", "图书价格", "图书ISBN",
				"图书出版社", "封面图片" };
		List dataset2 = new ArrayList();
		try {
			// BufferedInputStream bis = new BufferedInputStream(
			// new FileInputStream("V://book.bmp"));
		/*	BufferedInputStream bis = new BufferedInputStream(
					new FileInputStream("/home/book.bmp"));
			byte[] buf = new byte[bis.available()];
			while ((bis.read(buf)) != -1) {
				//
			}*/
			dataset2.add(equRobot);
			dataset2.add(equRobot);
			dataset2.add(equRobot);
			dataset2.add(equRobot);
			dataset2.add(equRobot);
			// OutputStream out = new FileOutputStream("E://export2003_a.xls");
			// OutputStream out2 = new FileOutputStream("E://export2003_b.xls");
			OutputStream out = new FileOutputStream("D:\\home\\123.xlsx");
			OutputStream out2 = new FileOutputStream("D:\\home\\456.xlsx");
			ex.exportExcel(headers, dataset, out);
			ex2.exportExcel(headers2, dataset2, out2);
			out.close();
			JOptionPane.showMessageDialog(null, "导出成功!");
			System.out.println("excel导出成功！");
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

导出成功后，在html页面弹出下载框，其中dataset为需要导出的数据的类集合。

	try {
            File file=File.createTempFile("异常点位识别表",".xlsx");
			OutputStream out = new FileOutputStream(file);
			String[] headers = { "点位序号", "点位名称", "识别类型", "原始结果", "审核结果","可见光1","红外光1","音频","视频"};
			exportExcelService.exportExcel(headers,dataset, out);
			out.close();
			exportDownLoadService.download(file.getAbsolutePath(), response);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
     	

弹出下载框

package com.cn.uk.robot.api.service;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Service;

@Service
public class ExportDownLoadService {
	
	
	@SuppressWarnings("unused")
	public void download(String path, HttpServletResponse response) {
		try {
			// path是指欲下载的文件的路径。
			File file = new File(path);
			// 取得文件名。
			String filename = file.getName();
			// 以流的形式下载文件。
			InputStream fis = new BufferedInputStream(new FileInputStream(path));
			byte[] buffer = new byte[fis.available()];
			fis.read(buffer);
			fis.close();
			// 清空response
			response.reset();
			// 设置response的Header
			response.addHeader("Content-Disposition", "attachment;filename="
					+ new String(filename.getBytes()));
			response.addHeader("Content-Length", "" + file.length());
			OutputStream toClient = new BufferedOutputStream(
					response.getOutputStream());
			response.setContentType("application/vnd.ms-excel;charset=gb2312");
			toClient.write(buffer);
			toClient.flush();
			toClient.close();
		} catch (IOException ex) {
			ex.printStackTrace();
		}
	}

}