vue springboot 实现excel导出

实现excel 导出

一、需求

实现 excel 的导出

二、技术

　　选用 easypoi

官网：

https://gitee.com/lemur/easypoi#http://doc.wupaas.com/docs/easypoi/easypoi-1c0u4mo8p4ro8

三、实现

　　1、前端

<el-button type="success" @click="handleExport">导出<i class="el-icon-upload el-icon--right"></i></el-button>
handleExport() {
  let a = document.createElement('a')
  a.href = "/xxx/export"
  a.click()
}         

　　2、后端

　　a、引入pom依赖

<!-- 引入EasyPoi包 -->
<dependency>
  <groupId>cn.afterturn</groupId>
  <artifactId>easypoi-spring-boot-starter</artifactId>
  <version>4.1.0</version>
</dependency>

<dependency>
  <groupId>commons-fileupload</groupId>
  <artifactId>commons-fileupload</artifactId>
  <version>1.4</version>
</dependency>

　　b、实体注解

@Data
public class UnitMaterialRecommendVo {
    @Excel(name = "序号", width = 10)
    private Integer num;
    @Excel(name = "体系", width = 25, orderNum = "1")
    private String unitSystem;
    @Excel(name = "单位", width = 25, orderNum = "2")
    private String unitName;
    @Excel(name = "参评类型", width = 25, orderNum = "3", replace = { "参评单位申报推荐_10", "文明单位复查审核_20" })
    private Integer reportType;
    @Excel(name = "审核结果", width = 25, orderNum = "4", replace = { "审核中_0", "审核通过_1", "审核不通过_-1" })
    private Integer state;
    @Excel(name = "联系方式", width = 25, orderNum = "5")
    private String unitDirectorPhone;
    @Excel(name = "所属省市", width = 25, orderNum = "6")
    private String unitCityName;
    @Excel(name = "文明单位类型", width = 25, orderNum = "7", replace = { "四川省文明单位_10", "四川省最佳文明单位_20"})
    private Integer civilizedUnitType;
    @Excel(name = "备注", width = 30, orderNum = "8")
    private String remark;
}

　　c、导出方法

List<UnitMaterialRecommend> list = this.list(wrapper);
String fileName = new String("文件名称.xls".getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1);
response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
response.setContentType("application/vnd.ms-excel;charset=gb2312");
List<UnitMaterialRecommendVo> result = new ArrayList<>();
AtomicInteger num = new AtomicInteger(1);
// 设置序号
list.forEach(item -> item.setNum(num.getAndIncrement()));
Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(), UnitMaterialRecommendVo.class, result);
workbook.write(response.getOutputStream());

三、备注

　　通过模板批量导出，采用  ExcelExportUtil.exportExcelClone 方法，详见下面示例：

　　private static final String SHEET_NAME = "sheetName";
    @Override
    public void multipleExport(HttpServletResponse response, UnitMaterialRecommend recommend) throws IOException {

        String fileName = new String("template.xls".getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1);
        response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
        response.setContentType("application/vnd.ms-excel;charset=gb2312");
        TemplateExportParams params = new TemplateExportParams("template/materialTemplate.xls");

        List<UnitMaterialRecommend> models = this.getModels(recommend);
        List<Map<String, Object>> listMap = new ArrayList<>();
        for (int j = models.size() - 1; j >= 0; j--) {
            Map<String, Object> modelMap = this.getModelMap(models.get(j));
            modelMap.put(SHEET_NAME, "sheet" + j);
            listMap.add(modelMap);
        }
        Map<Integer, List<Map<String, Object>>> realMap = new HashMap<>();
        realMap.put(0, listMap);
        Workbook workbook = ExcelExportUtil.exportExcelClone(realMap, params);
        workbook.write(response.getOutputStream());
    }

~~~以上