springboot集成阿里easyExcel

**pom文件**
	 
        org.springframework.boot
        spring-boot-starter
    
    
        org.springframework.boot
        spring-boot-starter-web
    
	
        com.alibaba
        easyexcel
        2.1.4
	
	
        org.apache.poi
        poi
        3.17
    
    
        org.apache.poi
        poi-ooxml
        3.17
    
    
        cglib
        cglib
        3.1
    
    
        org.projectlombok
        lombok
        1.16.22
    

注:easyexcel使用的是org.apache.poi的版本是3.17导入其他版本会导致版本冲突,讲道理这里导入easyexcel的包就可以不用导入org.apache.poi的包了,但是我试了好多次这个org.apache.poi的包如果不导入或者版本选择错误会报错
javaBean
/**

• 做下载时的实体类,要映射字段与列的关系
  */
  @Data
  @Builder
  public class DownloadData {
  @ExcelProperty(“字符串标题”)
  private String string;
  @ExcelProperty(“日期标题”)
  private Date date;
  @ExcelProperty(“数字标题”)
  private Double doubleData;
  }

/**

• 做上传时接收的实体类
  */
  @Data
  public class Accounts {
  private String name;
  private String password;
  private Integer age;
  }

controller层
/**

• @author ppshi

• @date 2019/12/19 20:25
  */
  @Controller
  @Validated
  public class ImportController {

  /**

  • 选择好文档直接上传,前提是要创建好对应的实体类
  • @param
  • @return
  • @throws Exception
    */
    @PostMapping(value = “/upload”)
    @ResponseBody
    public String uploadExcel(MultipartFile file) {
    try {
    EasyExcel.read(file.getInputStream(), Accounts.class, new DemoDataListeners()).sheet().doRead();
    } catch (IOException e) {
    e.printStackTrace();
    }
    return “success”;
    }

  /**

  • 在html页面直接下载
  • @param response
  • @throws IOException
    */
    @GetMapping("/download")
    public void download(HttpServletResponse response) throws IOException {
    response.setContentType(“application/vnd.ms-excel”);
    response.setCharacterEncoding(“utf-8”);
    String fileName = URLEncoder.encode(“测试”, “UTF-8”);
    response.setHeader(“Content-disposition”, “attachment;filename=” + fileName + “.xlsx”);
    EasyExcel.write(response.getOutputStream(), DownloadData.class).sheet(“模板1”).doWrite(getAllUser());
    }
    public static List getAllUser() {
    List userList = new ArrayList<>();
    for (int i = 0; i < 10; i++) {
    DownloadData user = DownloadData.builder().string(“李四” + i).date(new Date()).doubleData(new Double(i)).build();
    userList.add(user);
    }
    return userList;
    }
    }
    上传,下载html页面

上传