后端

导入pom依赖

<dependency>x
    <groupId>cn.afterturn</groupId>
    <artifactId>easypoi-spring-boot-starter</artifactId>
    <version>4.2.0</version>
</dependency>

Entity实体类

这里以User为例，可按照自己实际情况进行修改

@Excel：著名为导出字段        @ExcelIgnore：忽略导出字段

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User  extends Account implements Serializable {
    private static final long serialVersionUID = 1L;
    /** ID */
    @Excel(name = "ID",orderNum = "0",width = 15)
    private Integer id;
    /** 用户名 */
    @Excel(name = "用户名",orderNum = "1",width = 15)
    private String username;
    /** 密码 */
    @ExcelIgnore
    private String password;
    /** 姓名 */
    @Excel(name = "姓名",orderNum = "2",width = 15)
    private String name;
    /** 电话 */
    @Excel(name = "电话",orderNum = "3",width = 15)
    private String phone;
    /** 邮箱 */
    @Excel(name = "邮箱",orderNum = "4",width = 15)
    private String email;
    /** 头像 */
    @ExcelIgnore
    private String avatar;
    /** 角色标识 */
    @ExcelIgnore
    private String role;
    /** 验证码*/
    @ExcelIgnore
    private String kaptcha;
}

自定义Service

public List<User> exportUsers(){
        List<User> list = userMapper.selectExcel();
        return list;
    }

自定义控制器

@GetMapping(value = "/export")
 public void exportUsers(HttpServletResponse response) throws IOException {
        try {
            // 设置下载弹窗的文件名和格式（文件名要包括名字和文件格式）
            List<User> allList = userService.exportUsers();// 获取数据
            //导出操作
            ExcelUtil.exportExcel(allList,"用户信息表","用户信息表",
                    User.class,"用户信息表.xls",response);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

前端

在自定义拦截器中添加判断

request.interceptors.response.use(
    response => {
        let res = response.data;
        if(res.type === "application/vnd.ms-excel" && response.status === 200){// 说明是excel
            return response;
        }
        // 兼容服务端返回的字符串数据
        if (typeof res === 'string') {
            res = res ? JSON.parse(res) : res
        }
        if (res.code === '401') {
            router.push('/login')
        }
        return res;
    },
    error => {
        console.error('response error: ' + error) // for debug
        return Promise.reject(error)
    }
)

 

添加按钮点击事件

<el-button  type="success" plain @click="handlerExport">导出</el-button>

自定义组件用于导出

import request from "@/utils/request";
export function exportMemberList(){
    return request({
        url: '/user/export',
        method: 'get',
        responseType: 'blob',
        header: {
            headers: {
                'Content-Type': 'application/x-download'
            }
        },
    })
}

 

定义函数

handlerExport(){
       exportMemberList()
           .then((response) => {
             this.downloadFile(response, "员工信息表.xls");
             this.$message({
               showClose: true,
               message: "导出成功",
               type: "success",
             });
           })
     },
  downloadFile(res, fileName) {
      const content = res.data;
      const blob = new Blob([content]);
      if ("download" in document.createElement("a")) {
        // 非IE下载
        const elink = document.createElement("a");
        elink.download = fileName;
        elink.style.display = "none";
        elink.href = URL.createObjectURL(blob);
        document.body.appendChild(elink);
        elink.click();
        URL.revokeObjectURL(elink.href); // 释放URL 对象
        document.body.removeChild(elink);
      } else {
        // IE10+下载
        navigator.msSaveBlob(blob, fileName);
      }
    },