Springboot 使用easyexcel 实现Excel导出

导入easyexcel依赖

 <!--alibaba easyexcel  excel导出依赖-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>2.1.3</version>
        </dependency>

封装类上面的 @ExcelProperty(value = “设备号”, index = 0)
是excel的列名 和位置
代码

 @ExcelProperty(value = "设备号", index = 0)

导出excel 控制层

        @RequestMapping("/downloadEasyExcel")
        public void downloadEasyExcel(HttpServletResponse response,Task task) throws IOException {
            String fileName = URLEncoder.encode("历史任务列表", "UTF-8") + ConFig.newDate();
            response.setContentType("application/vnd.ms-excel");
            response.setCharacterEncoding("utf-8");
            response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
            // excel头策略
            WriteCellStyle headWriteCellStyle = new WriteCellStyle();
            WriteFont headWriteFont = new WriteFont();
            headWriteFont.setFontHeightInPoints((short) 11);
            headWriteFont.setBold(false);
            headWriteCellStyle.setWriteFont(headWriteFont);
            // excel内容策略
            WriteCellStyle contentWriteCellStyle = new WriteCellStyle();
            WriteFont contentWriteFont = new WriteFont();
            contentWriteFont.setFontHeightInPoints((short)11);
            contentWriteCellStyle.setWriteFont(contentWriteFont);
            // 设置handler
            HorizontalCellStyleStrategy styleStrategy = new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle);
            
            List<TaskExcel> tasks = taskService.selectHistoricalMissionEXCEL(task);
            EasyExcel.write(response.getOutputStream(), TaskExcel.class)
                    .sheet("下载excel服务")
                    .registerWriteHandler(styleStrategy)
                    .doWrite(tasks);
        }

在导出excel的时候经常会有这种需求 数据库里面存放的是数字 但是导出excel的时候不能显示数字

在sql使用 CASE方法

代码

(CASE task_status WHEN '3' THEN '完成' end ) as task_status,

最后导出样式