jxl将list导入到Excel中供下载
jxl操作excel工具类
import java.io.File; import java.io.IOException; import java.util.List; import jxl.format.Border; import jxl.format.BorderLineStyle; import jxl.format.Colour; import jxl.format.UnderlineStyle; import jxl.write.Label; import jxl.write.NumberFormats; import jxl.write.WritableCellFormat; import jxl.write.WritableFont; import jxl.write.WritableSheet; import jxl.write.WritableWorkbook; import jxl.write.WriteException; public class ExcelHelper{ /** * 分隔符 */ private final static String SEPARATOR = "|"; /** * 由List导出至指定的Sheet,带total行(最后一行) * @param wb 模板的workbook * @param sheetNum 第几个表单 * @param targetFilePath 生成文件夹路径 * @param l 内容list集合,以|分割的对象string集合 * @param headInfoRows 头信息的行数 * @param columnsLength 列数 * @param remarkRowNumber 备注所在行 * @param remark 备注 * @return * @throws WriteException * @throws IOException * int */ public static int exportExcelFromList(jxl.Workbook wb, int sheetNum, String targetFilePath, List<String> l, int headInfoRows, int columnsLength,int remarkRowNumber,String remark) throws WriteException, IOException { // 创建可写入的Excel工作薄对象 WritableWorkbook wwb = null; int writeCount = 0; // 单元格样式 // WritableFont bold = new // WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD);//设置字体种类和黑体显示,字体为Arial,字号大小为10,采用黑体显示 WritableCellFormat normalFormat = new WritableCellFormat( NumberFormats.TEXT); normalFormat.setBorder(Border.ALL, BorderLineStyle.THIN, jxl.format.Colour.BLACK); //设置字体; WritableFont font = new WritableFont(WritableFont.ARIAL,10,WritableFont.BOLD,false,UnderlineStyle.NO_UNDERLINE,Colour.RED); WritableCellFormat normalFormat_total = new WritableCellFormat( font); normalFormat_total.setBorder(Border.ALL, BorderLineStyle.THIN, jxl.format.Colour.BLACK); try { // 创建可写入的Excel工作薄对象 wwb = jxl.Workbook.createWorkbook(new File(targetFilePath), wb); WritableSheet ws = wwb.getSheet(0); Label cellRemark = new Label(0, remarkRowNumber, remark, normalFormat); ws.addCell(cellRemark); int row = l.size(); int columns = columnsLength; String[] ary = new String[120]; for (int i = 0; i < row; i++) { ary = l.get(i).split("\\" + SEPARATOR); for (int j = 0; j < columns; j++) { if(i==row-1) { Label cell = new Label(j, i + headInfoRows, ary[j], normalFormat_total); ws.addCell(cell); }else { Label cell = new Label(j, i + headInfoRows, ary[j], normalFormat); ws.addCell(cell); } } writeCount++; } wwb.write(); } catch (Exception ex) { ex.printStackTrace(); } finally { if (wwb != null) { wwb.close(); } } return writeCount; } /** * 导出不需要合计行 * @param wb * @param sheetNum * @param targetFilePath * @param l * @param headInfoRows * @param columnsLength * @param remarkRowNumber * @param remark * @return * @throws WriteException * @throws IOException */ public static int exportExcelFromListNoTotal(jxl.Workbook wb, int sheetNum, String targetFilePath, List<String> l, int headInfoRows, int columnsLength,int remarkRowNumber,String remark) throws WriteException, IOException { // 创建可写入的Excel工作薄对象 WritableWorkbook wwb = null; int writeCount = 0; // 单元格样式 // WritableFont bold = new // WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD);//设置字体种类和黑体显示,字体为Arial,字号大小为10,采用黑体显示 WritableCellFormat normalFormat = new WritableCellFormat( NumberFormats.TEXT); normalFormat.setBorder(Border.ALL, BorderLineStyle.THIN, jxl.format.Colour.BLACK); //设置字体; WritableFont font = new WritableFont(WritableFont.ARIAL,10,WritableFont.BOLD,false,UnderlineStyle.NO_UNDERLINE,Colour.BLACK); WritableCellFormat normalFormat_total = new WritableCellFormat( font); normalFormat_total.setBorder(Border.ALL, BorderLineStyle.THIN, jxl.format.Colour.BLACK); try { // 创建可写入的Excel工作薄对象 wwb = jxl.Workbook.createWorkbook(new File(targetFilePath), wb); WritableSheet ws = wwb.getSheet(0); Label cellRemark = new Label(0, remarkRowNumber, remark, normalFormat); ws.addCell(cellRemark); int row = l.size(); int columns = columnsLength; String[] ary = new String[120]; for (int i = 0; i < row; i++) { ary = l.get(i).split("\\" + SEPARATOR); for (int j = 0; j < columns; j++) { Label cell = new Label(j, i + headInfoRows, ary[j], normalFormat); ws.addCell(cell); } writeCount++; } wwb.write(); } catch (Exception ex) { ex.printStackTrace(); } finally { if (wwb != null) { wwb.close(); } } return writeCount; } /** * 生成简单Excel(head + content) * @param path 导出路径 * @param header Excel头 * @param contentlist Excel内容 * @return 成功返回true,失败返回false */ public static boolean exportSimpleExcel(String path,String header[],List<List<String>> contentlist){ WritableWorkbook book = null; try{ book = Workbook.createWorkbook(new File(path)); //生成名为eccif的工作表,参数0表示第一页 WritableSheet sheet = book.createSheet("Sheet1", 0); //表头导航 for(int j=0;j<header.length;j++){ Label label = new Label(j, 0, header[j]); sheet.addCell(label); } /*遍历List,记录集合*/ for(int i=0;i<contentlist.size();i++){ List row = contentlist.get(i); if (row!=null){ /*遍历单条记录的数据列*/ for (int j = 0;j<row.size();j++){ sheet.addCell(new Label(j,i+1, (String) row.get(j))); } } } // 写入数据并关闭文件 book.write(); } catch (Exception e) { e.printStackTrace(); return false; //导出失败 }finally{ if(book!=null){ try { book.close(); } catch (Exception e) { e.printStackTrace(); } } } return true; } }
无模板导出Excel
/*导出路径*/ String p = "D://测试.xls"; /*Excel头*/ String[] h = {"学号","学生姓名","系","班级"}; /*Excel内容*/ List<List<String>> list = new ArrayList<>(); List<String> row1 = new ArrayList<>(); row1.add("学号1"); row1.add("姓名1"); row1.add("系1"); row1.add("班级1"); list.add(row1); List<String> row2 = new ArrayList<>(); row2.add("学号2"); row2.add("姓名2"); row2.add("系2"); row2.add("班级2"); list.add(row2); /*调用函数导出Excel*/ ExcelHelper.exportSimpleExcel(p,h,list);
模板导出Excel
数据格式
exportList为List<String>,生成方式为遍历每个对象并将所有属性以|串起来
List<DetectorHistory> dfList = service.getList(); //获取对象集合 //生成的行数 int operatorCount = 0; List<String> exportList = new ArrayList<String>(); StringBuffer sbList = new StringBuffer(); if (dfList!=null&&dfList.size()>0) { for (DetectorHistory ele:dfList) { sbList.delete(0, sbList.length()); //加入| sbList.append("|"); //加入属性 ... exportList.add(sbList.toString()); operatorCount++; } }
导出
//模板所在文件夹路径 String tempPath = req.getSession().getServletContext() .getRealPath(File.separator + "downLoad" + File.separator + "FileTemplate"); //生成文件所在文件夹路径 String exportFilePath = req.getSession().getServletContext() .getRealPath(File.separator + "downLoad" + File.separator + "ExportFile"); //模板文件名,事先生成好以及头文件情况 String templateFileName = "F2TotalTmp.xls"; //生成文件名 String exportFileName = "F2Total" + CommonTool.getNowDateStr2() + "." + templateFileName.split("\\.")[1]; JSONObject jsonObject = new JSONObject(); try { // 文件导出 if (exportList.size() > 0) { //利用模板生成Workbook Workbook rw = jxl.Workbook.getWorkbook(new File(tempPath + File.separator + templateFileName)); // 写入备注行 String remarkInfo = "tip:辅修学分上限为2分"; // 导出文件路径 String targetFilePath = exportFilePath + File.separator + exportFileName; //导出文件的文件夹不存在即创建文件 File exportFile = new File(targetFilePath); if(!exportFile.exists()) { if (!exportFile.getParentFile().exists()) { //如果父文件夹不存在 exportFile.getParentFile().mkdirs(); //新建多层文件夹 } } //rw为模板workbook,0为sheetnum,其次为导出文件路径,exportList为|分割属性的string对象集合,4为头的行数,14为列数,1为备注所在行(从0开始),remarkinfo为备注所在行的信息 operatorCount = ExcelHelper.exportExcelFromListNoTotal(rw, 0, targetFilePath, exportList, 3, 8, 1, remarkInfo); } jsonObject.put("operatorCount", operatorCount); //返回操作条数 jsonObject.put("exportFilePath", File.separator + "downLoad" + File.separator + "ExportFile" + File.separator + exportFileName); //返回生成的文件路径 if(jsonObject.get("operatorCount")!=null&&Integer.valueOf(jsonObject.get("operatorCount").toString())<=0) {//当生成内容条数为0时 jsonObject.put("rtnCode", "404"); }else { jsonObject.put("rtnCode", "0"); } } catch (BiffException e) { e.printStackTrace(); } catch (WriteException e) { e.printStackTrace(); } finally{ } resp.resetBuffer(); resp.setContentType("text/html;charset=UTF-8"); resp.getOutputStream().write(jsonObject.toString().getBytes("utf-8")); resp.getOutputStream().flush();
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