Java 实现表格导出到Excel(.xlsx)

        最近项目中需要将table 中数据导出到excel ，当时我想的两种方案，一种是通过前端插件TableExport.js。发现简单使用的话，只是可以导出table 中原生的数据。一旦table 有jstl 标签判断的话，它读不到。最后采取通过服务端到来实现导出Excel 格式是.xlsx。这个方案可以导出大量的数据。分页显示。核心代码如下；

1、这个公用的方法不带表头标题的。

/**
     * 不带表头的Excel
     * @param title
     * @param headMap
     * @param jsonArray
     * @param datePattern
     * @param colWidth
     * @param out
     */
    public static void exportToExcel(Map headMap,JSONArray jsonArray,String datePattern,int colWidth, OutputStream out) {
        if(datePattern==null) datePattern = DEFAULT_DATE_PATTERN;
        // 声明一个工作薄
        SXSSFWorkbook workbook = new SXSSFWorkbook(1000);//缓存
        workbook.setCompressTempFiles(true);

        // 生成一个表格
        SXSSFSheet sheet = workbook.createSheet();
        //设置列宽
        int minBytes = colWidth iter = headMap.keySet().iterator(); iter
                .hasNext();) {
            String fieldName = iter.next();
            properties[ii] = fieldName;
            headers[ii] = headMap.get(fieldName);
            int bytes = fieldName.getBytes().length;
            arrColWidth[ii] =  bytes < minBytes ? minBytes : bytes;
            sheet.setColumnWidth(ii,arrColWidth[ii]*256);
            ii++;
        }
        // 遍历集合数据，产生数据行
        int rowIndex = 0;
        for (Object obj : jsonArray) {
            if(rowIndex == 65535 || rowIndex == 0){
                if ( rowIndex != 0 ) sheet = workbook.createSheet();//如果数据超过了，则在第二页显示

                SXSSFRow headerRow = sheet.createRow(0); //列头 rowIndex =1
                for(int i=0;i

2、如何调用。

 /**
     * 整合数据导出到Excle
     * 
     * @param response
     * @param userApplyMap
     */
    public void exportExcle(HttpServletResponse response, List> userApplyMap) {
        ServletOutputStream outputStream = null;
        FileInputStream fileInputStream = null;
        String toDir = null;
        try {
            JSONArray userApplyInfos = new JSONArray();
            if (!userApplyMap.isEmpty()) {// 数据集
                for (Map map : userApplyMap) {
                    com.alibaba.fastjson.JSONObject userApply = new com.alibaba.fastjson.JSONObject();
                    userApply.put("userName", map.get("userName"));
                    userApply.put("bankOpeningName", map.get("bankOpeningName"));
                    userApply.put("expenditure", map.get("expenditure"));
                    userApply.put("amount", map.get("amount"));
                    userApply.put("serviceFee", map.get("serviceFee"));
                    userApply.put("bankNo", map.get("bankNo"));
                    userApply.put("withdraw", getWithdrawOrStatus(map, 1));
                    userApply.put("bankOpening", new StringBuilder(
                            map.get("bankOpening").toString() + "\n" + map.get("bankName").toString()));
                    userApply.put("status", getWithdrawOrStatus(map, 2));
                    userApply.put("addTime",
                            DateFormat.getFormatNowTime(Long.parseLong(map.get("addTime").toString()), null));
                    userApplyInfos.add(userApply);
                }
                Map headMap = new LinkedHashMap();// 存放表头部信息
                headMap.put("userName", "账号");
                headMap.put("bankOpeningName", "收款人");
                headMap.put("expenditure", "金额");
                headMap.put("amount", "金额");
                headMap.put("serviceFee", "手续费");
                headMap.put("bankNo", "账户");
                headMap.put("withdraw", "方式");
                headMap.put("bankOpening", "信息");
                headMap.put("status", "状态");
                headMap.put("addTime", "申请时间");
                Random random = new Random();
                String title = "提现信息";
                // 生成文件临时存放目录
                toDir = QuzuUtils.getInstance().getDir(random);
                String path = new StringBuffer().append(toDir).append(title).append(QuzuConst.TYPE_ARRAY[0]).toString();
                OutputStream outXlsx = new FileOutputStream(path);
                ExcelUtil.exportToExcel(headMap, userApplyInfos, null, 0, outXlsx);
                outXlsx.close();
                response.setHeader("Content-Disposition", "attachment;filename="
                        + new String((title + QuzuConst.TYPE_ARRAY[0]).getBytes(), "iso-8859-1"));
                outputStream = response.getOutputStream();
                fileInputStream = new FileInputStream(path);
                byte[] bytes = new byte[1024];
                int size;
                while (-1 != (size = fileInputStream.read(bytes))) {
                    outputStream.write(bytes, 0, size);
                }
                outputStream.flush();
            } else {
                ResponseUtil.write(response, "暂无数据可导出");
            }
        } catch (Exception e) {
            logger.error("导出提现信息异常", e);
        } finally {
            if (fileInputStream != null)
                try {
                    fileInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            if (outputStream != null)
                try {
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

        }
        // 删除临时文件
        Utils.getInstance().deleteTempFiles(toDir);
    }

 /**
     * 导出excle
     * 
     * @param userApplySearchVo
     * @param request
     * @param response
     */
    @RequestMapping("/exportInfo")
    public void exportInfo(UserApplySearchVo userApplySearchVo, HttpServletRequest request,
            HttpServletResponse response) {
        
        try {
            Map params = new HashMap<>();
            creatParams(userApplySearchVo, params);
            List> userAccountApplies = userAccountApplyManageService.selectListWithUserName(params);//查出需要导出的数据
            exportExcle(response, userAccountApplies);//这里调用
        } catch (Exception e) {
            logger.error("查询列表异常", e);
        }
    }

3、效果图，号码随便抓的就打码。