springboot+poi 太过爱你忘了你带给我的痛 2022-03-06 09:36 192阅读 0赞 转自:[https://blog.csdn.net/qq\_42917455/article/details/84196431][https_blog.csdn.net_qq_42917455_article_details_84196431] 1.导入坐标 <!-- excel2003使用的包 --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.11</version> </dependency> <!-- excel2007+使用的包 --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.11</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml-schemas</artifactId> <version>3.11</version> </dependency> 2 poi 导出的controller package com.czxy.web.reportform; import com.czxy.common.DownloadUtil; import com.czxy.domain.teke\_delivery.WayBill; import com.czxy.service.take\_delivery.WayBillService; import org.apache.poi.ss.usermodel.\*; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import javax.servlet.http.HttpServletResponse; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.Date; import java.util.List; @RestController @RequestMapping("/poi") public class PoiController \{ @Autowired private WayBillService wayBillService; @GetMapping("/exportXls") public void exportXls(HttpServletResponse response) throws Exception\{ // 导出 运单信息 List<WayBill> wayBillList = wayBillService.findAll(); //1 创建工作簿 HSSFWorkbook 2003 XSSFWorkbook 2007 Workbook wb = new XSSFWorkbook(); //2 创建工作表 Sheet sheet = wb.createSheet(); // 设置列宽 sheet.setColumnWidth(0,10\*256); sheet.setColumnWidth(1,10\*256); sheet.setColumnWidth(2,10\*256); sheet.setColumnWidth(3,20\*256); sheet.setColumnWidth(4,20\*256); sheet.setColumnWidth(5,20\*256); sheet.setColumnWidth(6,20\*256); sheet.setColumnWidth(7,20\*256); sheet.setColumnWidth(8,20\*256); /\*\*\* \* 定义公共变量 \*/ int rowNo = 0,cellNo = 0; Row nRow = null; Cell nCell = null; /\*\*\*\*\*\*\*\*\*\*\*\*\*\*大标题\*\*\*\*\*\*\*\*\*\*\*\*\*/ //3 创建行 nRow = sheet.createRow(rowNo); // 设置行高 nRow.setHeightInPoints(36); //4 创建单元格 nCell = nRow.createCell(cellNo); //5 设置内容 nCell.setCellValue("bos系统运单信息"+new Date().toLocaleString()); //6 设置内容格式 // 合并单元格 //参数1:起始行 参数2:终止行 参数3:起始列 参数4:终止列 sheet.addMergedRegion(new CellRangeAddress(0, 0, (short) 0, (short) 9)); // 横向居中 + 水平居中 + 红色宋体22号 nCell.setCellStyle(bigTitleCellStyle(wb)); /\*\*\*\*\*\*\*\*\*\*\*\*\*小标题输出\*\*\*\*\*\*\*\*\*\*\*\*\*\*/ // 行号rowNo需要变化吗 列需要变化吗? rowNo++; String\[\] titles = \{"id","运单号","订单号","寄件人姓名","寄件人电话","寄件人地址","收件人姓名","收件人电话","收件人地址"\}; //3 创建行 nRow = sheet.createRow(rowNo); for (String title:titles)\{ //4 创建单元格 nCell = nRow.createCell(cellNo++);// 先创建cell单元格,然后在自增 //5 设置内容 nCell.setCellValue(title); //6 设置内容格式 nCell.setCellStyle(titleCellStyle(wb)); \} /\*\*\*\*\*\*\*\*\*\*\*\*\*\*内容\*\*\*\*\*\*\*\*\*\*\*\*\*/ // 行号和列号需要变化? rowNo++; for(WayBill wayBill:wayBillList)\{ cellNo=0; //3 创建行 nRow = sheet.createRow(rowNo++); //4 创建单元格 nCell = nRow.createCell(cellNo++); //5 设置内容 nCell.setCellValue(wayBill.getId()+""); //6 设置内容格式 nCell.setCellStyle(contentCellStyle(wb)); // wayBillNum nCell = nRow.createCell(cellNo++); nCell.setCellValue(wayBill.getWayBillNum()); nCell.setCellStyle(contentCellStyle(wb)); //订单号 nCell = nRow.createCell(cellNo++); nCell.setCellStyle(contentCellStyle(wb)); //发件人姓名 nCell = nRow.createCell(cellNo++); nCell.setCellValue(wayBill.getSendName()); nCell.setCellStyle(contentCellStyle(wb)); //发件人电话 nCell = nRow.createCell(cellNo++); nCell.setCellValue(wayBill.getSendMobile()); nCell.setCellStyle(contentCellStyle(wb)); //发件人地址 nCell = nRow.createCell(cellNo++); nCell.setCellValue(wayBill.getSendAddress()); nCell.setCellStyle(contentCellStyle(wb)); //收件人姓名 nCell = nRow.createCell(cellNo++); nCell.setCellValue(wayBill.getRecName()); nCell.setCellStyle(contentCellStyle(wb)); //收件人电话 nCell = nRow.createCell(cellNo++); nCell.setCellValue(wayBill.getRecMobile()); nCell.setCellStyle(contentCellStyle(wb)); //收件人地址 nCell = nRow.createCell(cellNo++); nCell.setCellValue(wayBill.getRecAddress()); nCell.setCellStyle(contentCellStyle(wb)); \} /\*\*\*\*\*\*\*\*\*\*\*\*\*7 下载\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*/ DownloadUtil downloadUtil = new DownloadUtil(); ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); // 将wb写入流 wb.write(byteArrayOutputStream); /\*\* byteArrayOutputStream 将文件内容写入ByteArrayOutputStream response HttpServletResponse 写入response returnName 返回的文件名 \*/ downloadUtil.download(byteArrayOutputStream,response,"bos运单表.xlsx"); \} public CellStyle bigTitleCellStyle(Workbook wb)\{ // 横向居中 + 水平居中 + 红色宋体22号 CellStyle cellStyle = wb.createCellStyle(); // 横向居中 cellStyle.setAlignment(CellStyle.ALIGN\_CENTER); // 垂直居中 cellStyle.setVerticalAlignment(CellStyle.VERTICAL\_CENTER); Font font = wb.createFont(); font.setFontHeight((short) 440); font.setColor(Font.COLOR\_RED); font.setFontName("宋体"); cellStyle.setFont(font); return cellStyle; \} public CellStyle titleCellStyle(Workbook wb)\{ // 宋体16号 倾斜 边框线 水平垂直居中 Font font = wb.createFont(); font.setFontName("宋体"); font.setItalic(true); font.setBold(true); CellStyle cellStyle = wb.createCellStyle(); cellStyle.setFont(font); // 边框线 cellStyle.setBorderTop(CellStyle.BORDER\_THIN);// 细线 cellStyle.setBorderRight(CellStyle.BORDER\_DASHED);//圆点.... cellStyle.setBorderBottom(CellStyle.BORDER\_DOTTED);// 矩形的虚线\_ \_ \_ \_ \_ cellStyle.setBorderLeft(CellStyle.BORDER\_DOUBLE);// 双线 // 横向居中 cellStyle.setAlignment(CellStyle.ALIGN\_CENTER); // 垂直居中 cellStyle.setVerticalAlignment(CellStyle.VERTICAL\_CENTER); return cellStyle; \} public CellStyle contentCellStyle(Workbook wb)\{ // 边框线 水平垂直居中 CellStyle cellStyle = wb.createCellStyle(); // 边框线 cellStyle.setBorderTop(CellStyle.BORDER\_THIN);// 细线 cellStyle.setBorderRight(CellStyle.BORDER\_THIN);// cellStyle.setBorderBottom(CellStyle.BORDER\_THIN);// cellStyle.setBorderLeft(CellStyle.BORDER\_THIN);// return cellStyle; \} \} 3.下载文件的utils package com.czxy.common; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletResponse; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; public class DownloadUtil \{ /\*\* \* @param filePath 要下载的文件路径 \* @param returnName 返回的文件名 \* @param response HttpServletResponse \* @param delFlag 是否删除文件 \*/ protected void download(String filePath,String returnName,HttpServletResponse response,boolean delFlag)\{ this.prototypeDownload(new File(filePath), returnName, response, delFlag); \} /\*\* \* @param file 要下载的文件 \* @param returnName 返回的文件名 \* @param response HttpServletResponse \* @param delFlag 是否删除文件 \*/ protected void download(File file,String returnName,HttpServletResponse response,boolean delFlag)\{ this.prototypeDownload(file, returnName, response, delFlag); \} /\*\* \* @param file 要下载的文件 \* @param returnName 返回的文件名 \* @param response HttpServletResponse \* @param delFlag 是否删除文件 \*/ public void prototypeDownload(File file,String returnName,HttpServletResponse response,boolean delFlag)\{ // 下载文件 FileInputStream inputStream = null; ServletOutputStream outputStream = null; try \{ if(!file.exists()) return; response.reset(); //设置响应类型 PDF文件为"application/pdf",WORD文件为:"application/msword", EXCEL文件为:"application/vnd.ms-excel"。 response.setContentType("application/octet-stream;charset=utf-8"); //设置响应的文件名称,并转换成中文编码 //returnName = URLEncoder.encode(returnName,"UTF-8"); returnName = response.encodeURL(new String(returnName.getBytes(),"iso8859-1")); //保存的文件名,必须和页面编码一致,否则乱码 //attachment作为附件下载;inline客户端机器有安装匹配程序,则直接打开;注意改变配置,清除缓存,否则可能不能看到效果 response.addHeader("Content-Disposition", "attachment;filename="+returnName); //将文件读入响应流 inputStream = new FileInputStream(file); outputStream = response.getOutputStream(); int length = 1024; int readLength=0; byte buf\[\] = new byte\[1024\]; readLength = inputStream.read(buf, 0, length); while (readLength != -1) \{ outputStream.write(buf, 0, readLength); readLength = inputStream.read(buf, 0, length); \} \} catch (Exception e) \{ e.printStackTrace(); \} finally \{ try \{ outputStream.flush(); \} catch (IOException e) \{ e.printStackTrace(); \} try \{ outputStream.close(); \} catch (IOException e) \{ e.printStackTrace(); \} try \{ inputStream.close(); \} catch (IOException e) \{ e.printStackTrace(); \} //删除原文件 if(delFlag) \{ file.delete(); \} \} \} /\*\* \* by tony 2013-10-17 \* @param byteArrayOutputStream 将文件内容写入ByteArrayOutputStream \* @param response HttpServletResponse 写入response \* @param returnName 返回的文件名 \*/ public void download(ByteArrayOutputStream byteArrayOutputStream, HttpServletResponse response, String returnName) throws IOException\{ response.setContentType("application/octet-stream;charset=utf-8"); returnName = response.encodeURL(new String(returnName.getBytes(),"iso8859-1")); //保存的文件名,必须和页面编码一致,否则乱码 response.addHeader("Content-Disposition", "attachment;filename=" + returnName); response.setContentLength(byteArrayOutputStream.size()); ServletOutputStream outputstream = response.getOutputStream(); //取得输出流 byteArrayOutputStream.writeTo(outputstream); //写到输出流 byteArrayOutputStream.close(); //关闭 outputstream.flush(); //刷数据 \} \} 4 导入Excel文件 public static void main(String\[\] args) throws Exception\{ // 流读取文件 FileInputStream is = new FileInputStream(new File("d:\\\\area.xls")); // 根据流创建文件 Workbook wb = new HSSFWorkbook(is); // 获取sheet Sheet sheet = wb.getSheetAt(0); // 遍历row for(Row row:sheet)\{ // 第一行是标题,不需要读取 if(row.getRowNum()==0)\{ continue; \} // 当遇到空行,跳过 if(row.getCell(0)==null || StringUtils.isBlank(row.getCell(1).getStringCellValue()))\{ continue; \} // 打印内容 System.out.print(row.getCell(0).getStringCellValue()+":"); System.out.print(row.getCell(1).getStringCellValue()+":"); System.out.print(row.getCell(2).getStringCellValue()+":"); System.out.print(row.getCell(3).getStringCellValue()+":"); System.out.println(row.getCell(4).getStringCellValue()); \} \} \--------------------- 作者:520\_HL 来源:CSDN 原文:https://blog.csdn.net/qq\_42917455/article/details/84196431 版权声明:本文为博主原创文章,转载请附上博文链接! [https_blog.csdn.net_qq_42917455_article_details_84196431]: https://blog.csdn.net/qq_42917455/article/details/84196431
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