使用easypoi导出excel

        <!--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>

@ExcelTarget("summaryexcel")
@Data
public class SummaryExcel {


    @Excel(name = "日期", orderNum = "1", mergeVertical = true, isImportField = "date")
    private String date;//当天日期

    @Excel(name = "能源类型", orderNum = "2", mergeVertical = true, isImportField = "type")
    private String type;         // 能源类型

    @Excel(name = "能源用量", orderNum = "3", mergeVertical = true, isImportField = "sum")
    private Double sum;          // 用量
}

    
　　@GetMapping("getexcel")
　　public void download(HttpServletRequest request, HttpServletResponse response,String start,String end) 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("数据表","UTF-8") + ".xls");
        //编码
        response.setCharacterEncoding("UTF-8");
        List<SummaryExcel> list = summaryService.summaryexcel(start,end);
        Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(), SummaryExcel.class, list);
        workbook.write(response.getOutputStream());
    }