jxls实现Excel导出

SpringMVC层:

@ApiOperation(value = "导出")
    @RequestMapping(value = "/export/queries", method = RequestMethod.GET)
    public void exportQueries(@RequestParam(required = false) String customerNo,
                              @RequestParam(required = false) String projectNo,
                              HttpServletRequest request, HttpServletResponse response) throws IOException {
        ProjectAccountVo projectAccountVo = new ProjectAccountVo();
        projectAccountVo.setCustomerNo(customerNo);
        projectAccountVo.setProjectNo(projectNo);
        List<ProjectAccountVo> list = this.projectAccountService.queryForExport(projectAccountVo);
        Context context = new Context();
        //导出数据
        context.putVar("account", list);
        try {
            parseExcelService.exportExcel("projectAccount.xlsx", "account", context, request, response);
        } catch (IOException e) {
            throw new ApplicationException("导出失败");
        }
    }

this.projectAccountService.queryForExport(projectAccountVo);这段代码是从数据库中查出你需要导出的数据.然后把数据存放到Context容器中
Service层代码:

/**
     * 导出Excel
     *
     * @param templateFileName 模板文件名称
     * @param destFileName     生成文件名称
     * @param context          内容
     * @param request
     * @param response
     * @throws IOException
     */
    public void exportExcel(String templateFileName, String destFileName, Context context, HttpServletRequest request, HttpServletResponse response) throws IOException {
        StringBuilder builder = new StringBuilder();
        //获取文件,该文件就是导出的模板文件
        templateFileName = builder.append(request.getServletContext().getRealPath("/")).append("/template/export/").append(templateFileName).toString();
        builder.setLength(0);
        //生成文件名称
        destFileName = builder.append(destFileName).append("-").append(DateUtil.format2String(new Date(), DateUtil.DATE_DIGIT_FULL)).toString();
        response.reset();
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/vnd.ms-excel;charset=UTF-8");
        response.setHeader("Content-Disposition", "attachment;filename=" + new String(destFileName.getBytes("gbk"), "iso8859-1") + ".xlsx");
        //http输出流
        OutputStream out = response.getOutputStream();
        FileInputStream fileInputStream = new FileInputStream(templateFileName);
        //多sheet生成后需删除模块页,需调用processTemplateAtCell方法，正常调用processTemplate即可
        JxlsHelper.getInstance().processTemplate(fileInputStream, out, context);
        fileInputStream.close();
        out.close();
    }

jx:each顾名思义就是遍历代码中放进context中的list,

context.putVar("account", list); items就是account;
jx:area是限制解析Excel的范围,值得注意的是这个jx:area这个标签必须放在A1这个位置,也就是左上角