easypoi 導出excel

一 基礎篇

1.座標：

<dependency>
        <groupId>cn.afterturn</groupId>
        <artifactId>easypoi-base</artifactId>
        <version>3.2.0</version>
</dependency>
<dependency>
        <groupId>cn.afterturn</groupId>
        <artifactId>easypoi-web</artifactId>
        <version>3.2.0</version>
</dependency>
<dependency>
       <groupId>cn.afterturn</groupId>
       <artifactId>easypoi-annotation</artifactId>
       <version>3.2.0</version>
</dependency>

2.controller

 @RequestMapping(value = "/export", produces = {"application/json"}, method = RequestMethod.GET)
    public void export(@Validated @RequestBody TrafficSearchVo detailSearchVo ,HttpServletResponse response) {
        detailSearchVo.setProjectIdList(getAuthProjectIdList());
        groupHomeTrafficService.export(detailSearchVo,response);
    }

3.service

/**
     * 導出excel
     * @param detailSearchVo
     * @param response
     */
    public void export(TrafficSearchVo detailSearchVo,HttpServletResponse response){
        //獲取數據庫數據
        detailSearchVo.setItemsPerPage(Integer.MAX_VALUE);
        Paginator<TrafficDataListVo> trafficDetailListPage = getTrafficDetailListPage(detailSearchVo);
        List<TrafficDataListVo> list = Lists.newArrayList(trafficDetailListPage.getResults());

        //生成Excel文件
        ExportParams exportParams = new ExportParams();
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams,
            TrafficDataListVo.class,list);
        workbook.setSheetName(0,"車流");
        response.setCharacterEncoding("UTF-8");
        response.setHeader("content-Type", "application/vnd.ms-excel");
        //通過輸出流輸出文件
        try {
            response.setHeader("Content-Disposition",
                "attachment;filename=" + URLEncoder.encode("車流", "UTF-8") + ".xls");
            ServletOutputStream out = response.getOutputStream();
            workbook.write(out);
            out.flush();
            out.close();
        } catch (UnsupportedEncodingException e) {
            log.error("======method:export exception:" ,e);
        } catch (IOException e) {
            log.error("======method:export exception:" ,e);
        }
    }

深入篇

1.標題單元格合併：關鍵參數 groupName

2.動態表頭

a.關鍵代碼(表頭)：

ExcelExportEntity colEntity = new ExcelExportEntity("項目A", "projectName");
colEntity.setNeedMerge(true);
colEntity.setWidth(30);
colEntity.setHeight(20);
.....很多格式或姿勢你都可以在這裏設置
colList.add(colEntity);
...其他列省略

b.組裝數據：

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Map<String,Object> h1 = new HashMap<String,Object>();
h1.put("projectName", "項目A");
h1.put("contractArea", 0);
h1.put("rentArea", 0);
h1.put("rentedSpaceNumber", 0);
h1.put("rentedArea", 0);
h1.put("rentedOccupancyRate", 0);
list.add(h1);

c.導出：

 /**
     * 生成excel （動態標題）
     *
     * @param response
     * @param list     導出的數據
     * @param headList excel 標題
     * @param fileName 導出的文件名
     */
    public static void generateExcelActiveHead(HttpServletResponse response, List<? extends Object> list, List<ExcelExportEntity> headList, String fileName) {
        log.info("======method:generateExcelActiveHead list:{},", JSON.toJSONString(list));
        //生成Excel文件
        ExportParams exportParams = new ExportParams();
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, headList, list);
        workbook.setSheetName(0, fileName);
        response.setCharacterEncoding("UTF-8");
        response.setHeader("content-Type", "application/vnd.ms-excel");
        //通過輸出流輸出文件
        try {
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8") + ".xls");
            ServletOutputStream out = response.getOutputStream();
            workbook.write(out);
            out.flush();
            out.close();
        } catch (UnsupportedEncodingException e) {
            log.error("======method:generateExcelActiveHead exception:", e);
        } catch (IOException e) {
            log.error("======method:generateExcelActiveHead exception:", e);
        }
    }

參考鏈接：
座標
代碼示例
@excel使用介紹
postman 如何下載eccel
標題合併
動態表頭
動態表頭