springboot easypoi导出excel

1.easypoi导出excel所需要的依赖包

<!--easypoi导出excel-->
        <!--easypoi-base 导入导出的工具包,可以完成Excel导出,导入,Word的导出,Excel的导出功能-->
        <dependency>
            <groupId>org.jeecg</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>2.3.1</version>
        </dependency>
        <!--easypoi-web  耦合了spring-mvc 基于AbstractView,极大的简化spring-mvc下的导出功能-->
        <dependency>
            <groupId>org.jeecg</groupId>
            <artifactId>easypoi-web</artifactId>
            <version>2.3.1</version>
        </dependency>
        <!--easypoi-annotation 基础注解包,作用与实体对象上,拆分后方便maven多工程的依赖管理-->
        <dependency>
            <groupId>org.jeecg</groupId>
            <artifactId>easypoi-annotation</artifactId>
            <version>2.3.1</version>
        </dependency>

2.User实体类注解添加如下

@Entity
@Table(name = "t_user")
@ExcelTarget("user")
public class User {
  @Id
  @GeneratedValue
  @Excel(name = "编号", orderNum = "1", mergeVertical = true, isImportField = "id")
  private int id;
  @Excel(name = "姓名", orderNum = "2", mergeVertical = true, isImportField = "name")
  private String name;

3.UserController核心代码 

@RequestMapping("/downloadExcel")
  public void download(HttpServletRequest request, HttpServletResponse response) throws Exception {
    // 告诉浏览器用什么软件可以打开此文件
    response.setHeader("content-Type", "application/vnd.ms-excel");
    // 下载文件的默认名称
    response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode("用户数据表","UTF-8") + ".xls");
    //编码
    response.setCharacterEncoding("UTF-8");
    List<User> list = userRepository.findAll();//获得用户
    Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(), User.class, list);
    workbook.write(response.getOutputStream());
  }