java poi导出excel 工具

<dependency>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi</artifactId>
         <version>3.10-FINAL</version>
    </dependency>
 <dependency>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi-ooxml</artifactId>
         <version>3.10-FINAL</version>
</dependency>

import lombok.extern.slf4j.Slf4j;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.regex.Matcher;


/**
 * Excel工具类
 *
 * @author yunfei
 */
@Slf4j
public class ExeclUtil {
        
        
        //正则判断是否是数字
        private static Pattern p = Pattern.compile("^//d+(//.//d+)?$");
  

    /**
     * @param title
     * @param headers
     * @param dataset
     */
    public static InputStream exportExcel(String title, String[] headers, List<Object[]> dataset) {

        InputStream is;

        ByteArrayOutputStream os = new ByteArrayOutputStream();
        // 声明一个工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        // 生成一个表格
        HSSFSheet sheet = workbook.createSheet(title);
        // 设置表格默认列宽度为15个字节
        sheet.setDefaultColumnWidth(15);
        // 生成一个样式
        HSSFCellStyle style = workbook.createCellStyle();
        // 设置这些样式
        style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
        style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        // 生成一个字体
        HSSFFont font = workbook.createFont();
        font.setColor(HSSFColor.VIOLET.index);
        font.setFontHeightInPoints((short) 12);
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // 把字体应用到当前的样式
        style.setFont(font);
        // 生成并设置另一个样式
        HSSFCellStyle style2 = workbook.createCellStyle();
        style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
        style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
        style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
        style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        // 生成另一个字体
        HSSFFont font2 = workbook.createFont();
        font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
        // 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
        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
        // 定义注释的大小和位置,详见文档
        HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5));
        // 设置注释内容
        comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
        // 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("leno");

        // 产生表格标题行
        HSSFRow row = sheet.createRow(0);
        for (int i = 0; i < headers.length; i++) {
            HSSFCell cell = row.createCell(i);
            cell.setCellStyle(style);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }

        // 遍历集合数据，产生数据行
        int index = 0;

        for (Object[] o : dataset) {

            index++;

            row = sheet.createRow(index);
            for (int i = 0; i < o.length; i++) {
                HSSFCell cell = row.createCell(i);

                cell.setCellStyle(style2);
                try {

                    Object value = o[i];
                    if (value == null) {
                        value = "";
                    }
                    // 判断值的类型后进行强制类型转换
                    String textValue = null;
                    if (value instanceof Boolean) {
                        boolean bValue = (Boolean) value;
                        textValue = "男";
                        if (!bValue) {
                            textValue = "女";
                        }
                    } else if (value instanceof Date) {
                        Date date = (Date) value;
                        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                        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, (int) (35.7 * 80));
                        // sheet.autoSizeColumn(i);
                        byte[] bsValue = (byte[]) value;
                        HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 7, index, (short) 7, index);
                        anchor.setAnchorType(2);
                        patriarch.createPicture(anchor, workbook.addPicture(bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
                    } else {
                        // 其它数据类型都当作字符串简单处理
                        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) {
                        Matcher matcher = p.matcher(textValue);
                        if (matcher.matches()) {
                            // 是数字当作double处理
                            cell.setCellValue(Double.parseDouble(textValue));
                        } else {
                            HSSFRichTextString richString = new HSSFRichTextString(
                                    textValue);
                            HSSFFont font3 = workbook.createFont();
                            font3.setColor(HSSFColor.BLUE.index);
                            richString.applyFont(font3);
                            cell.setCellValue(richString);
                        }
                    }
                } catch (Exception e) {
                    log.error(e.getMessage(), e);
                    e.printStackTrace();
                } finally {
                    // 清理资源
                }
            }

        }
        try {
            workbook.write(os);
        } catch (IOException e) {
            log.error(e.getMessage(), e);
            e.printStackTrace();
        }
        is = new ByteArrayInputStream(os.toByteArray());
        return is;

    }

    /**
     * 导出excel
     *
     * @param response
     * @param headArray   表头
     * @param contentList 内容
     * @param fileName    文件名
     * @throws Exception
     */
    public static void exportExcel(HttpServletResponse response, String[] headArray, List contentList, String fileName) throws Exception {
        // 读到流中
        InputStream inStream = exportExcel(fileName, headArray, contentList);
        // 设置输出的格式
//        response.reset();
        response.setContentType("application/octet-stream");
        response.addHeader("Access-Control-Expose-Headers","Content-Disposition");
        response.addHeader("Content-Disposition", "attachment; filename=\""
                + fileName + "\"");
//        response.addHeader("Access-Control-Allow-Credentials","true");
        // 循环取出流中的数据
        byte[] b = new byte[100];
        int len;
        try {
            while ((len = inStream.read(b)) > 0) {
                response.getOutputStream().write(b, 0, len);
            }
            inStream.close();
        } catch (IOException e) {
            log.error(e.getMessage(), e);
            e.printStackTrace();
        }
    }

}

  public void exportTransaction(String userId, String orderNo, String dateFrom, String dateEnd, String orderStatus, String payment, String userOrAgentId, HttpServletResponse response) throws Exception {
        ResultData<List<OrderViewVO>> resultData = umrahApi.getOrderList(userId, orderNo, dateFrom, dateEnd, orderStatus, payment, userOrAgentId);
        List<OrderViewVO> orderViewVOList = resultData.getData();
        log.info("Order数据共：{} 条",orderViewVOList.size());
        String[] headers = {"Order Number","Book Date","User ID","Order Status","Departure Date"};
        List<Object[]> objects = new ArrayList<>();
        for (OrderViewVO entity : orderViewVOList) {
            Object[] o = {entity.getOrderNumber,...省略 };
            objects.add(o);
        }

        ExeclUtil.exportExcel(response, headers, objects, "transactions.xls");
    }