SpringBoot中 Excel的下载

需要的依赖

	
            com.alibaba
            easyexcel
            3.1.0
        

用到的注解
@ExcelProperty(“职位编号”) 对字段进行注解，即导出的excel的目录一栏
@JsonFormat(pattern = “yyyy-MM-dd HH:mm:ss”, timezone = “Asia/Shanghai”) 日期格式注解
@TableId(value = “id”, type = IdType.AUTO) 标注表的主键

关键

Serializable 开启流的接口
private static final long serialVersionUID = 1L;相关的配置

package com.huang.vhr.framework.web.entity;

import com.alibaba.excel.annotation.ExcelProperty;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.fasterxml.jackson.annotation.JsonFormat;

import java.io.Serializable;
import java.time.LocalDateTime;


public class Position implements Serializable {

    private static final long serialVersionUID = 1L;

    @TableId(value = "id", type = IdType.AUTO)
    @ExcelProperty("职位编号")
    private Integer id;

    
    @ExcelProperty("职位名称")
    private String name;

    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "Asia/Shanghai")
    @ExcelProperty("创建时间")
    private LocalDateTime createDate;

    @ExcelProperty("是否启用")
    private Boolean enabled;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public LocalDateTime getCreateDate() {
        return createDate;
    }

    public void setCreateDate(LocalDateTime createDate) {
        this.createDate = createDate;
    }

    public Boolean getEnabled() {
        return enabled;
    }

    public void setEnabled(Boolean enabled) {
        this.enabled = enabled;
    }

    @Override
    public String toString() {
        return "Position{" +
                "id=" + id +
                ", name=" + name +
                ", createDate=" + createDate +
                ", enabled=" + enabled +
                "}";
    }

}

  @GetMapping("/export")
    public void download(HttpServletResponse response) throws IOException {
        // 这里注意 有同学反应使用swagger 会导致各种问题，请直接用浏览器或者用postman
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        response.setCharacterEncoding("utf-8");
        // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
        String fileName = URLEncoder.encode("职位数据", "UTF-8").replaceAll("\+", "%20");
        response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
        EasyExcel.write(response.getOutputStream(), Position.class).sheet("职位信息").doWrite(positionService.getAllpp());
    }

service
List getAllpp();



serviceImpl
 @Override
    public List getAllpp() {
        List positions = positionMapper.selectPageInfo();
        return positions;
    }

其实没有什么不同，只是controller的实现分页方法中的sql查询用了mybatis-plus的写法而已

package com.huang.vhr.framework.web.entity;

import java.io.Serializable;
import java.util.Date;

import com.alibaba.excel.annotation.ExcelIgnore;
import com.alibaba.excel.annotation.ExcelProperty;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

@Data
@ToString
@NoArgsConstructor
public class Employeeremove implements Serializable {
    private static final long serialVersionUID = 1L;
    
    @TableId(value = "id", type = IdType.AUTO)
    @ExcelProperty("调动编号")
    private Integer id;

    

    @ExcelProperty("调动与主表关联")
    private Integer eid;

    
    @ExcelProperty("调动后部门")
    private Integer afterDepId;

    
    @ExcelProperty("调动后职位")
    private Integer afterJobId;

    
    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone = "Asia/Shanghai")
    @ExcelProperty("调动日期")
    private Date removeDate;

    
    @ExcelProperty("调动原因")
    private String reason;

    
    @ExcelProperty("调动评语")
    private String remark;
}

   @GetMapping("/export")
    public void download(HttpServletResponse response) throws IOException {
        // 这里注意 有同学反应使用swagger 会导致各种问题，请直接用浏览器或者用postman
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        response.setCharacterEncoding("utf-8");
        // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
        String fileName = URLEncoder.encode("职位数据", "UTF-8").replaceAll("\+", "%20");
        response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
        EasyExcel.write(response.getOutputStream(), Employeeremove.class).sheet("职位信息").doWrite(employeeremoveService.list());
    }

service层

service
 {
public interface EmployeeremoveService extends IService {
}


serviceImpl
@Service
public class EmployeeremoveServiceImpl extends ServiceImpl implements EmployeeremoveService {
}

注意：

1.postman这种测试工具测试excel下载是可以成功的，但是没办法进行下载
2.想要下载拿到文件的话你要通过浏览器
3.excel下载的时候一定会涉及到权限的问题，怎么处理这个权限要考虑好，否则会报错

例如黄黄这里是把动态权限关掉了，然后配了一个放行。

下载成功excel浏览图