大数据量excel导出

01

上次写了一行代码解决导出导入，没看的小伙伴建议先看下《一行代码做Excel导入导出》,但是实际业务中遇到一个问题，如果数据里比较大的时候，例如10w+数据一次导出，就会出现卡死情况，继续看官方文档，有大数据量导出方法，实现如下

@RequestMapping("export")

public void export(HttpServletResponse response) {

Map params = new HashMap();

Workbook workbook = bigExcel(1, params, null, new ExportParams("海贼王", "海贼王"), new Page());

ExcelExportUtil.closeExportBigExcel();

downLoadExcel("海贼王.xls", response, workbook);

}

private Workbook bigExcel(int pageNum, Map params, Workbook workbook, ExportParams exportParams, Page page) {

page.setCurrent(pageNum);

page.setSize(1000);

page.setCondition(params);

page = this.getData(sysUserService.queryPage(page));

List users = FastJsonUtils.toList(FastJsonUtils.toJSONString(page.getRecords()), SysUser.class);

workbook = ExcelExportUtil.exportBigExcel(exportParams, SysUser.class, users);

if (page.getPages() > pageNum) {

bigExcel(pageNum + 1, params, workbook, exportParams, page);

}

return workbook;

}

private void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {

try {

response.setCharacterEncoding("UTF-8");

response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));

response.setHeader("content-Type", "application/vnd.ms-excel");

workbook.write(response.getOutputStream());

} catch (IOException e) {

throw new NormalException(e.getMessage());

}

}

动动手指摁一下吧

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