Use EasyPoi to import and export Excel tables

foreword

This article describes the most basic use of EasyPOI, that is, exporting and importing Excel documents.

---

1. Add EasyPoi dependency

<properties>
      <easypoi.version>4.1.2</easypoi.version>
</properties>

<dependencies>
		<!-- easy-poi -->
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>${easypoi.version}</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-web</artifactId>
            <version>${easypoi.version}</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-annotation</artifactId>
			<version>${easypoi.version}</version>
        </dependency>
</dependencies>

2. java test class

	@Test
    public void directExportExcelByObject() throws IOException {
    
    
        List<StudentVO> list = new ArrayList<>(16);
        StudentVO student;
        Random random = new Random();
        for (int i = 0; i < 10; i++) {
    
    
            student = new StudentVO(i + "",
                    "name" + i,
                    random.nextInt(2),
                    random.nextInt(100),
                    new Date(),
                    "className" + i);
            student.setSchoolName("学校名称" + i);
            student.setSchoolAddress("学校地址" + i);
            list.add(student);
        }

        ExportParams exportParams = new ExportParams();
        // 设置sheet得名称
        exportParams.setSheetName("我是sheet名字");
        List<Map<String, Object>> sheetsList = new ArrayList<>();
        // 创建sheet1使用得map
        Map<String, Object> deptExportMap = new HashMap<>();
        // title的参数为ExportParams类型，目前仅仅在ExportParams中设置了sheetName
        deptExportMap.put("title", exportParams);
        // 模版导出对应得实体类型
        deptExportMap.put("entity", StudentVO.class);
        // sheet中要填充得数据
        deptExportMap.put("data", list);
        sheetsList.add(deptExportMap);

        // 创建参数对象（用来设定excel得sheet得内容等信息）
        ExportParams empExportParams = new ExportParams();
        empExportParams.setSheetName("我是sheet名字2");
        // 创建sheet2使用得map
        Map<String, Object> empExportMap = new HashMap<>();
        empExportMap.put("title", empExportParams);
        empExportMap.put("entity", StudentVO.class);
        empExportMap.put("data", list);
        sheetsList.add(empExportMap);


        // 生成workbook 并导出
        Workbook workbook = ExcelExportUtil.exportExcel(sheetsList,ExcelType.XSSF);
        //Workbook workbook1 = ExcelExportUtil.exportExcel(exportParams, StudentVO.class, list);
      /*  File savefile = new File("C:/Users/JustryDeng/Desktop/");
        if (!savefile.exists()) {
            boolean result = savefile.mkdirs();
            System.out.println("目录不存在，创建" + result);
        }*/
        FileOutputStream fos = new FileOutputStream("D:\\test\\student11.xlsx");
        workbook.write(fos);
        fos.close();
    }

3. Entity class annotations

/**
 * 学校模型
 */
@Data
class SchoolVO {
    
    

    /**
     * 学校名称
     */
    @Excel(name = "学校名称", orderNum = "6", width = 20)
    private String schoolName;

    /**
     * 学校地址
     */
    @Excel(name = "学校地址", orderNum = "8", width = 20)
    private String schoolAddress;


}

@Data
class StudentVO extends SchoolVO {
    
    

    /**
     * name指定导出excel时生成的列名
     * orderNum可指定导出的该属性对应的所在列的位置
     * width设置单元格宽度
     * type设置导出类型  1是文本, 2是图片, 3是函数,10 数字 默认是文本
     */
    @Excel(name = "学号", orderNum = "1", type = 10, width = 15)
    private String studentID;

    @Excel(name = "姓名", orderNum = "2", width = 15)
    private String name;

    /**
     * 当gender为1时，导出的结果为 男， 当gender为0时，导出的结果为 女
     * mergeVertical设置是否纵向合并列
     */
    @Excel(name = "性别", mergeVertical = true, replace = {
    
    "男_1", "女_0"}, orderNum = "3", width = 5)
    private Integer gender;

    /**
     * type设置导出类型  1是文本, 2是图片, 3是函数,10 数字 默认是文本
     */
    @Excel(name = "年龄", orderNum = "4", type = 10, width = 5)
    private int age;

    /**
     * 将Data日期导出为yyyy-MM-dd格式
     * mergeVertical设置是否纵向合并列
     * mergeRely设置合并列的前提条件，即:只有当索引为2的列(即:"性别"列)已经
     * 合并了时，那么此时这一列的纵向相同时，才能纵向合并;如果引为2的
     * 列(即:"性别"列)纵向数据不同，那么就算此列的纵向数据相同，那么
     * 也不会合并
     */
    @Excel(name = "入校时间", mergeVertical = true, mergeRely = {
    
    2}, format = "yyyy-MM-dd", orderNum = "5", width = 20)
    private Date entranceTime;

    @Excel(name = "班级", orderNum = "7", width = 15)
    private String className;

    /**
     * 无参构造
     */
    public StudentVO() {
    
    
    }

    /**
     * 全参构造
     */
    public StudentVO(String studentID, String name, Integer gender,
                     int age, Date entranceTime, String className) {
    
    
        this.studentID = studentID;
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.entranceTime = entranceTime;
        this.className = className;
    }
}

4. Export the results

---

Summarize

If this article is helpful to you, I hope that the big guys can 关注, 点赞, 收藏, 评论support a wave, thank you very much!
Please correct me if I am wrong!!!

Reference 1
Reference 2