依赖：
<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>2.1.6</version>
</dependency>

导出：

public Class Test{

     public void importExcel(HttpServletResponse response){

            List<ProjectInfoVo> list = new ArrayList<>();

                    //ExcelWriter excelWriter = null;

                     for(int i=0;i<8;i++){

                         ProjectInfoVo infoVo = new ProjectInfoVo();

                         infoVo.setId(i+1);

                         infoVo.setProjectTypeName("香港建材类项目"+i+1);

                         infoVo.setPrjName("九龙房地产开发项目"+i+1);

                         infoVo.setDetailAddr("香港九龙");

                         infoVo.setPrjIntro("社区居住类房屋");

                         infoVo.setRealStartDate(new Date());

                         infoVo.setResultVal("开发中");

                         list.add(infoVo);

            }

            try{

                        response.setContentType("application/vnd.ms-excel");

                        response.setCharacterEncoding("utf-8");

                        // 这里URLEncoder.encode可以防止中文乱码 当然和easyExcel没有关系

                        String fileNames = "mergeWrite" + System.currentTimeMillis() + ".xlsx";

                        response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileNames + ".xlsx");

                        EasyExcel.write(response.getOutputStream(), ProjectInfoVo.class).sheet("sheet名称")

                                .doWrite(list);

                    } catch (Exception e) {

                        e.printStackTrace();

                    }

     }

    public void importWriter(@RequestPart("file") MultipartFile file){

               List<Member> list = EasyExcel.read(file.getInputStream())

.head(Member.class)

.sheet()

.doReadSync();

for (Member member : list) {

System.out.println(member);

}

   }

}