导出excel

将Jqgrid表格中的数据进行下载导出


excel的sheet列的表头，分别对应三个表单


		List<String> sheet1 = new LinkedList<String>();
		sheet1.add("1");
		sheet1.add("2");
		sheet1.add("3");
		sheet1.add("4");
		sheet1.add("5");
		sheet1.add("6");
		sheet1.add("7");


		List<String> sheet2 = new LinkedList<String>();
		sheet2.add("1");
		sheet2.add("2");
		sheet2.add("3");
		sheet2.add("4");
		
		List<String> sheet3 = new LinkedList<String>();
		sheet3.add("1");
		sheet3.add("2");
		sheet3.add("3");
		sheet3.add("4");
		
		//将3个的表的列的名字分别添加进来
		List<List<String>> excelTitle = new LinkedList<List<String>>();
		excelTitle.add(sheet1);
		excelTitle.add(sheet2);
		excelTitle.add(sheet3);


		String sheet1Name = "第一个表单的名字";
		String sheet2Name = "第二个表单的名字";
		String sheet3Name = "第三个表单的名字";
		
		List<String> sheetName = new LinkedList<String>();
		sheetName.add(sheet1Name);
		sheetName.add(sheet2Name);
		sheetName.add(sheet3Name);
		
		//用来存放所有的sheet1、sheet2和sheet3的数据的容器
		List<List<String[]>> exportDataList = new LinkedList<List<String[]>>();
		
		//用来接受接受的数据
		List<String[]> sheetDataList1 = new LinkedList<String[]>();
		List<String[]> sheetDataList2 = new LinkedList<String[]>();
		List<String[]> sheetDataList3 = new LinkedList<String[]>();
					
					
		//获取三个表单的中的数据也是这样，分别和列名中1、2、3等等对应起来
		String[] data = new String[10];
		data[0] = "数据一";
		data[1] = "数据二";
		data[2] = "数据三";
		data[3] = "数据四";
		data[4] = "数据五";
		data[5] = "数据六";
		data[6] = "数据七";
		sheetDataList1.add(data);
		
		data[0] = "数据一";
		data[1] = "数据二";
		data[2] = "数据三";
		data[3] = "数据四";
		sheetDataList2.add(data);
		
		data[0] = "数据一";
		data[1] = "数据二";
		data[2] = "数据三";
		data[3] = "数据四";
		sheetDataList3.add(data);
		
		exportDataList.add(sheetDataList1);
		exportDataList.add(sheetDataList2);
		exportDataList.add(sheetDataList3);
		
		
		public static Map<String, String> exportExcel(String excelName, List<List<String>> excelTitle,
            List<List<String[]>> excelDatalist, List<String> sheetName, String rootPath,
            String storeFolder) {
        Map<String, String> exportedExcelPathMap = null;
        try {
            SimpleDateFormat df = new SimpleDateFormat("MMdd_HHmm");
            rootPath = URLDecoder.decode(rootPath + storeFolder + File.separator, "UTF-8");
            String fileName = null;
            if (StringUtils.isNotBlank(excelName)) {
                fileName = URLDecoder.decode(excelName + ".xls","UTF-8");
            } else {
                fileName = URLDecoder.decode(df.format(new Date()) + ".xls", "UTF-8");
            }
            File outputDir = new File(rootPath);
            if (!outputDir.exists()) {
                outputDir.mkdirs();
            }
            WritableWorkbook wwb;
            File outputFile = new File(rootPath + fileName);
            if(outputFile.exists())
            	outputFile.delete();//刪除之前已经存在的相同文件名的文件
            wwb = Workbook.createWorkbook(outputFile);
            for (int sheetNumber = 0; sheetNumber < sheetName.size(); ++sheetNumber) {
                WritableSheet sheet = wwb.createSheet(sheetName.get(sheetNumber), sheetNumber);
                Label label;
                WritableCellFormat textFormat = new WritableCellFormat(NumberFormats.TEXT);
                textFormat.setAlignment(Alignment.CENTRE);
                CellView cv = new CellView();
                cv.setFormat(textFormat);
                cv.setAutosize(true);
                for (int i = 0; i < excelTitle.get(sheetNumber).size(); i++) {
                    sheet.setColumnView(i, cv);
                    label = new Label(i, 0, excelTitle.get(sheetNumber).get(i), textFormat);
                    sheet.addCell(label);


                }
                if (excelDatalist.size() > 0) {
                    for (int i = 0; i < excelDatalist.get(sheetNumber).size(); i++) {
                        String[] row = excelDatalist.get(sheetNumber).get(i);
                        int rowLength = row.length;
                        for (int j = 0; j < rowLength; j++) {
                            if (row[j] == null)
                                continue;
                            sheet.setColumnView(i, cv);
                            label = new Label(j, i + 1, row[j], textFormat);
                            sheet.addCell(label);
                        }
                    }
                }
            }
            wwb.write();
            wwb.close();
            exportedExcelPathMap = new HashMap<String, String>();
            exportedExcelPathMap.put("filepath", rootPath);
            exportedExcelPathMap.put("filename", fileName);
            return exportedExcelPathMap;
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (RowsExceededException e) {
            e.printStackTrace();
        } catch (WriteException e) {
            e.printStackTrace();
        } finally {


        }
        return exportedExcelPathMap;
    }