java 导出Excel 大数据量

/**
     * 生成<span style="white-space: normal; background-color: #ffffff;">XLSX</span>,2007版本的excel,每个sheet无6.5W的行数限制，但是到了一定数量，可能内存溢出，
     * 次方法适合在预计10W以下的数据导出时使用,本机测试，14W可以导出。列数量在8列左右
     * 
     * @param fileOut
     *            输出流
     * @param sheetMap
     *            要设置的数据信息
     * @throws SQLException
     */
    public static void createXSLXByResultSet(OutputStream fileOut, WriteXLSBean... beans)
            throws SQLException {
        try {
            //重点 Workbook
            Workbook wb = new XSSFWorkbook();
            for (int i = 0, len = beans.length; i < len; i++) {
                WriteXLSBean xlsBean = beans[i];
                Sheet sheet = wb.createSheet(xlsBean.getSheetName());
                ResultSet rs = xlsBean.getRs();
                ResultSetMetaData rsmd = rs.getMetaData();
                TypeHandlerRegistry tr = BeanContext.tr;
                Map<String, String> th = xlsBean.getTh();
                int index = 0;
                while (rs.next()) {
                    long t1 = System.currentTimeMillis();
                    org.apache.poi.ss.usermodel.Row row = sheet
                            .createRow(index);
                    for (int j = 0, numberOfColumns = rsmd.getColumnCount(); j < numberOfColumns; j++) {
                        String key = rsmd.getColumnLabel(j + 1).toLowerCase();
                        if (th.containsKey(key)) {
                            TypeHandler<?> type = tr.getTypeHandler(JdbcType
                                    .forCode(rsmd.getColumnType(j + 1)));
                            Object obj = type.getResult(rs, key);
                            row.createCell(j).setCellValue(obj == null ? ""
                                    : obj.toString());
                        }
                    }
                    System.out.println(index + " :"
                            + (System.currentTimeMillis() - t1));
                    index++;
                }
            }
            //重点 Workbook
            wb.write(fileOut);
        } catch (IOException e) {
            e.printStackTrace();
            throw new ServiceRunTimeException("生产xls文档错误", e);
        } finally {

        }
    }

/**
     * 生产xls,2003版本的excel,每个sheet有6.5W的行数限制
     * 
     * @param fileOut
     *            输出流，未关闭
     * @param sheetMap
     *            要导出的数据信息
     */
    public static void createXSLByMap(OutputStream fileOut, Map<String, Table<Row<String, Object>>> sheetMap) {
        try {
            HSSFWorkbook wb = new HSSFWorkbook();
            Set<String> keys = sheetMap.keySet();
            for (Iterator<String> iterator = keys.iterator(); iterator
                    .hasNext();) {
                String SheetKey = iterator.next();
                Sheet sheet = wb.createSheet(SheetKey);
                List<Row<String, Object>> sheetRows = sheetMap.get(SheetKey);
                for (int i = 0, len = sheetRows.size(); i < len; i++) {
                    Map<String, Object> cellMap = sheetRows.get(i);
                    Set<String> cellSet = cellMap.keySet();
                    org.apache.poi.ss.usermodel.Row row = sheet.createRow(i);
                    int j = 0;
                    for (Iterator<String> iterCell = cellSet.iterator(); iterCell
                            .hasNext(); j++) {
                        String cellKey = iterCell.next();
                        Object obj = cellMap.get(cellKey);
                        row.createCell(j).setCellValue(obj == null ? ""
                                : obj.toString());
                    }
                }
            }
            wb.write(fileOut);
        } catch (IOException e) {
            e.printStackTrace();
            throw new ServiceRunTimeException("生产xls文档错误", e);
        } finally {
        }
    }

static String src="abcdefafslfelgtryjukjhgfdadertjDSFGHJKJGHFERTUIOabcdefafslfelgtryjukjhgfdadertjDSFGHJKdertjDSFGHJKJGHFERTUIOabcdefafslfelgtryjukjhgfdadertjDSFGHJKJGHFERTUIO";
    public static void main(String[] args) throws Throwable {
        SXSSFWorkbook wb = new SXSSFWorkbook(100); // 这里100是在内存中的数量，如果大于此数量时，会写到硬盘，以避免在内存导致内存溢出
        Sheet sh = wb.createSheet();
        for (int rownum = 0; rownum < 1000000; rownum++) {
            Row row = sh.createRow(rownum);
            for (int cellnum = 0; cellnum < 10; cellnum++) {
                Cell cell = row.createCell(cellnum);
                String address = new CellReference(cell).formatAsString();
                cell.setCellValue(address+src.substring(rownum%10*10+1, (rownum%10+1)*10));
            }
        }
        File file = new File("F:/aa.xlsx");
        file.createNewFile();
        FileOutputStream out = new FileOutputStream(file);
        wb.write(out);
        out.close();
    }