导出excel

最新推荐文章于 2024-12-19 15:40:20 发布

wcfeng_9527

最新推荐文章于 2024-12-19 15:40:20 发布

阅读量378

点赞数

CC 4.0 BY-SA版权

分类专栏： java

本文链接：https://blog.youkuaiyun.com/wcfeng_9527/article/details/50977960

java 专栏收录该内容

19 篇文章

订阅专栏

本文详细介绍了如何使用Apache POI框架生成Excel文件的完整流程，并提供了具体的代码示例。包括从定义集合数据到最终写入Excel文件的全过程，覆盖了数据类型转换、样式设置、条件判断等关键环节。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

记录一下啊导出excel的方法，防止以后用到忘记了。

excel生成：

package com.shijie99.OrderUnUse.service;

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.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class ExportExcel<T> {
	public void exportExcel(Collection<T> dataset, OutputStream out) {
		exportExcel("测试POI导出EXCEL文档", null, dataset, out, "yyyy-MM-dd");
	}

	public void exportExcel(String[] headers, Collection<T> dataset,
			OutputStream out) {
		exportExcel("测试POI导出EXCEL文档", headers, dataset, out, "yyyy-MM-dd");
	}

	public void exportExcel(String[] headers, Collection<T> dataset,
			OutputStream out, String pattern) {
		exportExcel("测试POI导出EXCEL文档", headers, dataset, out, pattern);
	}

	public void exportExcel(String title, String[] headers,
			Collection<T> dataset, OutputStream out, String pattern) {

		// 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
		Iterator<T> 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 (int i = 0; i < fields.length; i++) {
				HSSFCell 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<? extends Object> 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 instanceof Boolean) {
						// TODO 布尔型需要处理
					} else 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;
						HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
								1023, 255, (short) 6, index, (short) 6, 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) {
						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 {
							HSSFRichTextString richString = new HSSFRichTextString(
									textValue);
							// HSSFFont font3 = workbook.createFont();
							// font3.setColor(HSSFColor.BLUE.index);
							// 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();
		}

	}
}

service:

package com.shijie99.OrderUnUse.service;

import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.shijie99.OrderUnUse.dao.OrderUnUseDao;
import com.shijie99.OrderUnUse.po.DownloadExcelInfo;
import com.shijie99.OrderUnUse.po.OrderUnused;
import com.shijie99.OrderUnUse.po.QueryCondition;
import com.shijie99.OrderUnUse.util.CopyUtil;

@Service
public class ExcelServiceImpl implements ExcelService {
	@Autowired
	private OrderUnUseDao orderUnUseDao;
	private static Logger logger = Logger.getLogger(ExcelServiceImpl.class);
	@Override
	public void exportExcel(QueryCondition qc,OutputStream out) {
		logger.info("开始导出excel,时间范围:"+qc.getStart()+"-"+qc.getEnd());
		ExportExcel<DownloadExcelInfo> ex = new ExportExcel<DownloadExcelInfo>();
		String[] headers = { "渠道订单号", "机票号", "开票渠道", "开票PNR", "出票方","订单创建时间" };
		List<OrderUnused> list = orderUnUseDao.queryOrderUnused(qc);
		List<DownloadExcelInfo> downList = new ArrayList<DownloadExcelInfo>();
		for (OrderUnused orderUnused : list) {
			DownloadExcelInfo downloadInfo = new DownloadExcelInfo();
			CopyUtil.copy(orderUnused, downloadInfo);
			downList.add(downloadInfo);
		}
		ex.exportExcel(headers, downList, out);
		logger.info("excel导出成功！时间范围:"+qc.getStart()+"-"+qc.getEnd());
	}
	
}

下载action:

/**
	 * excel 下载请求
	 * @param request
	 * @param response
	 */
	@RequestMapping("/downLoadExcel")
	public void downLoadExcel(HttpServletRequest request,HttpServletResponse response){
		String userAgent = request.getHeader("USER-AGENT");
		try {
			
			String start = request.getParameter("start");
			String end = request.getParameter("end");
			String openForUse = request.getParameter("openForUse");
			QueryCondition qc = new QueryCondition();
			qc.setStart(start);
			qc.setEnd(end);
			qc.setOpenForUse(openForUse);
			String fileName = (openForUse.equals("1")?"未使用_":"已使用_")+start+"_"+end+".xls";
			//解决导出文件名中文乱码问题
			String finalFileName = null;
			if(StringUtils.contains(userAgent, "MSIE")){//IE浏览器
                finalFileName = URLEncoder.encode(fileName,"UTF8");
            }else if(StringUtils.contains(userAgent, "Mozilla")){//google,火狐浏览器
                finalFileName = new String(fileName.getBytes("UTF-8"), "ISO8859-1");
            }else{
                finalFileName = URLEncoder.encode(fileName,"UTF8");//其他浏览器
            }
			response.setHeader("Content-Disposition", "attachment; filename=\"" + finalFileName + "\"");//这里设置一下让浏览器弹出下载提示框，而不是直接在浏览器中打开
			response.setContentType("application/msexcel");
			ServletOutputStream out = response.getOutputStream();
			excelService.exportExcel(qc,out);
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

页面点击按钮：

window.open("${pageContext.request.contextPath }/downLoadExcel?openForUse=0&start="+start+"&end="+end);