spring boot + easypoi快速实现excel导入导出

easypoi封装了poi让我们能够非常简单的实现Excel导出,Excel模板导出,Excel导入,Word模板导出等，具体可见官网：http://www.afterturn.cn/。

我这边实现了一个excel的导出，记录一下。

1、pom文件引入starter

<dependency>
   <groupId>cn.afterturn</groupId>
   <artifactId>easypoi-spring-boot-starter</artifactId>
   <version>3.2.0</version>
</dependency>

2、定义需要导出的对象DTO

@Table(name = "ORDERS")
public class OrderExcelDto{

    @Excel(name = "ORDER_ID", width = 25,orderNum = "0")
    private String orderId;

    @Excel(name = "CREATE_TIME",width = 20,exportFormat = "yyyy-MM-dd HH:mm:ss", orderNum = "1")
    private Date createTime;

    @Excel(name = "STATUS",width = 20,replace = {"created_01", "payment_02","used_03","time out_04"}, orderNum = "2")
    private String status;

    public String getOrderId() {
        return orderId;
    }

    public void setOrderId(String orderId) {
        this.orderId = orderId;
    }

    public Date getCreateTime() {
        return createTime;
    }

    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }
}

具体语义如下，详情可见官网

name：列明；replace：前者是最后替换的值，后者是数据库的值；exportFormat：导出的时间格式,以这个是否为空来判断是否需要格式化日期；width：列宽等

3、将查询的sql映射到上述的DTO，然后通过starter中提供工具类做导出操作

@GetMapping("/orderExport")
    public void orderExport(HttpServletResponse response) throws Exception {
        response.setHeader("content-Type", "application/vnd.ms-excel");
        response.setHeader("Content-Disposition", "attachment;filename=orders.xls");
        List<OrderExcelDto> list = orderService.queryOrderExcel();
        Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(),OrderExcelDto.class,list);
        workbook.write(response.getOutputStream());
    }

4、前台js中可以直接定义事件触发上述get请求

function  export() {
    document.location.href = host+"/orderExport";
}

最后就可以验证一下了，如果有问题可以邮件我。