Java POI 导入Excell

##Java POI 导入Excell
导入表格
public String toExcel(HttpServletRequest request, HttpServletResponse response,String phone,String time,String sendListid,Integer type) throws IOException {
Map<String,Object> map=new HashMap<>();
if(time!=null && !"".equals(time)){
String time1=time.substring(0,10);
String time2=time.substring(13,23);
map.put(“time1”,time1);
map.put(“time2”,time2);
}
map.put(“phone”,phone);
map.put(“sendListid”,sendListid);
map.put(“type”,type);
List<Map<String,Object>> frequencyList = frequenceService.findAll(map);
HSSFWorkbook wb = null;

    //List<MenuTree> ZorganizeFunctionsList=organizationalFormatService.getOrganizeFunctions(organizationalFormatId);//创建第一行表头String title="抽奖列表";//创建第二行表头String[] title2={"序号","手机号","微信名","openId","金额","订单编号","时间"};//创建Excel工作簿XSSFWorkbook workbook = new XSSFWorkbook();//创建一个工作表sheetXSSFSheet sheet = workbook.createSheet("sheet0");//设置单元格宽度sheet.setColumnWidth(1,25*256);sheet.setColumnWidth(2,25*256);sheet.setColumnWidth(3,25*256);sheet.setColumnWidth(4,20*256);sheet.setColumnWidth(5,30*256);sheet.setColumnWidth(6,30*256);//创建第一行XSSFRow row = sheet.createRow(0);XSSFCell cell=row.createCell(0);row.setHeight((short) 400);// 定义单元格为字符串类型cell.setCellType(HSSFCell.ENCODING_UTF_16);cell.setCellValue(title);//合并范围,参数(起始行号<int firstRow>，终止行号<int lastRow>， 起始列号<int firstCol>，终止列号<int lastCol>).(从0开始算,0代表Excel的第一行/列)CellRangeAddress CellRange=new CellRangeAddress(0,0,0,4);sheet.addMergedRegion(CellRange);XSSFCellStyle cellStyle = workbook.createCellStyle();//指定单元格居中对齐cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);//指定单元格垂直居中对齐cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//设置单元格字体XSSFFont font = workbook.createFont();font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);font.setFontName("宋体");font.setFontHeight((short) 400);cellStyle.setFont(font);//指定单元格为cellcell.setCellStyle(cellStyle);//创建第1行XSSFRow row2=sheet.createRow(1);XSSFCell cell2x=null;//插入第二行数据for (int i = 0; i < title2.length; i++) {cell2x= row2.createCell(i);cell2x.setCellValue(title2[i]);cell2x.setCellStyle(cellStyle);}int flay=2;for(Map<String,Object> frequency:frequencyList){XSSFRow row3=sheet.createRow(flay);//排行XSSFCell GCell=row3.createCell(0);GCell.setCellValue(flay-1);//手机XSSFCell ACell=row3.createCell(1);ACell.setCellValue(frequency.get("phone").toString());//微信名称XSSFCell BCell=row3.createCell(2);BCell.setCellValue(frequency.get("weName").toString());//openIdXSSFCell CCell=row3.createCell(3);CCell.setCellValue(frequency.get("openId").toString());//金额XSSFCell DCell=row3.createCell(4);DCell.setCellValue(frequency.get("moneys").toString());//订单编号XSSFCell ECell=row3.createCell(5);if (frequency.get("sendListid")!=null){ECell.setCellValue(frequency.get("sendListid").toString());}else {ECell.setCellValue("");}//时间XSSFCell FCell=row3.createCell(6);FCell.setCellValue(StringUtil.dateToString1((Date) frequency.get("createTime")));XSSFCellStyle cellStyle2 = workbook.createCellStyle();//指定单元格居中对齐cellStyle2.setAlignment(HSSFCellStyle.ALIGN_CENTER);//指定单元格垂直居中对齐cellStyle2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//指定单元格为ACellFCell.setCellStyle(cellStyle2);ACell.setCellStyle(cellStyle2);BCell.setCellStyle(cellStyle2);CCell.setCellStyle(cellStyle2);DCell.setCellStyle(cellStyle2);ECell.setCellStyle(cellStyle2);FCell.setCellStyle(cellStyle2);GCell.setCellStyle(cellStyle2);flay+=1;}//String pathUrl=request.getSession().getServletContext().getRealPath("");//存放的路径String path1 = ResourceBundleUtil.getString("system", "fileupload.path");// File oldFile = new File(pathUrl).getParentFile();String fileName2="抽奖列表";//获取当前系统路径分隔符//String s=File.separator;//String pathUrl2=pathUrl.substring(0,pathUrl.lastIndexOf(s));String message="file/"+ fileName2 + ".xls";File file=new File(path1,message);try {file.createNewFile();//打开文件输出流FileOutputStream fos = FileUtils.openOutputStream(file);//将workbook写入流workbook.write(fos);fos.flush();fos.close();} catch (IOException e) {e.printStackTrace();}// String fileName=pathUrl2+s+"file"+s+fileName2+".xls";String fileName=path1+"/"+message;String downloadFilename=fileName2+".xls";FileDownLoadUtil.downLoad(response, fileName, downloadFilename);return null;}

2.工具类

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;

/**
*

该工具类实现文件的下载，文档、图片均可
@
/
public class FileDownLoadUtil {
/
- @param response
- @param fileName 完整文件路径
- @param downloadFilename 在下载框默认显示的文件名–中文是没有问题的,带后缀名
- 注意：文件名拼接的时候注意，不同的系统的斜杠不同，使用File.separator自动识别
- @throws IOException
  */
  public static void downLoad(HttpServletResponse response,String fileName,String downloadFilename) throws IOException{
  
  // 对默认下载的文件名编码。不编码的结果就是，在客户端下载时文件名乱码
  downloadFilename = URLEncoder.encode(downloadFilename, “UTF-8”);
  
  File file = new File(fileName);
  if (file.exists()) {
  // 写明要下载的文件的大小
  response.setContentLength((int) file.length());
  // 设置在下载框默认显示的文件名
  response.setHeader(“Content-Disposition”, “attachment;filename=”
  + downloadFilename);
  // 指明response的返回对象是文件流
  response.setContentType(“application/octet-stream”);
  // 读出文件到response
  // 这里是先需要把要把文件内容先读到缓冲区
  // 再把缓冲区的内容写到response的输出流供用户下载
  FileInputStream fileInputStream = new FileInputStream(file);
  BufferedInputStream bufferedInputStream = new BufferedInputStream(
  fileInputStream);
  byte[] b = new byte[bufferedInputStream.available()];
  bufferedInputStream.read(b);
  OutputStream outputStream = response.getOutputStream();
  outputStream.write(b);
  // 人走带门
  bufferedInputStream.close();
  outputStream.flush();
  outputStream.close();
  }
}

}

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