<dependencies>
    <dependency>
        <groupId>cn.afterturn</groupId>
        <artifactId>easypoi-base</artifactId>
        <version>4.1.0</version>
    </dependency>
    <dependency>
        <groupId>cn.afterturn</groupId>
        <artifactId>easypoi-web</artifactId>
        <version>4.1.0</version>
    </dependency>
    <dependency>
        <groupId>cn.afterturn</groupId>
        <artifactId>easypoi-annotation</artifactId>
        <version>4.1.0</version>
    </dependency>
</dependencies>

@Data
public class UserEntity {

    @Excel(name = "姓名")
    private String name;

    @Excel(name = "年龄")
    private int age;

    @Excel(name = "操作时间", format = "yyyy-MM-dd HH:mm:ss", width = 20.0)
    private Date time;

}

public class Export {

    public static void main(String[] args) throws Exception {
        List<UserEntity> dataList = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            UserEntity userEntity = new UserEntity();
            userEntity.setName("张三" + i);
            userEntity.setAge(20 + i);
            userEntity.setTime(new Date(System.currentTimeMillis() + i));
            dataList.add(userEntity);
        }
        //生成excel文档
        Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams("用户", "用户信息"),
                UserEntity.class, dataList);
        FileOutputStream fos = new FileOutputStream("execl/easypoi-user1.xls");
        workbook.write(fos);
        fos.close();
    }

}

public class Import {

    public static void main(String[] args) {
        ImportParams params = new ImportParams();
        params.setTitleRows(1);
        params.setHeadRows(1);
        long start = new Date().getTime();
        List<UserEntity> list = ExcelImportUtil.importExcel(new File("execl/easypoi-user1.xls"),
                UserEntity.class, params);
        System.out.println(new Date().getTime() - start);
        System.out.println(JSONArray.toJSONString(list));
    }

}

public class CustomExport {

    public static void main(String[] args) throws Exception {
        //封装表头
        List<ExcelExportEntity> entityList = new ArrayList<ExcelExportEntity>();
        entityList.add(new ExcelExportEntity("姓名", "name"));
        entityList.add(new ExcelExportEntity("年龄", "age"));
        ExcelExportEntity entityTime = new ExcelExportEntity("操作时间", "time");
        entityTime.setFormat("yyyy-MM-dd HH:mm:ss");
        entityTime.setWidth(20.0);
        entityList.add(entityTime);
        //封装数据体
        List<Map<String, Object>> dataList = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            Map<String, Object> userEntityMap = new HashMap<>();
            userEntityMap.put("name", "张三" + i);
            userEntityMap.put("age", 20 + i);
            userEntityMap.put("time", new Date(System.currentTimeMillis() + i));
            dataList.add(userEntityMap);
        }
        //生成excel文档
        Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams("学生", "用户信息"), entityList, dataList);
        FileOutputStream fos = new FileOutputStream("execl/easypoi-user2.xls");
        workbook.write(fos);
        fos.close();
    }

}

public class CustomImport {

    public static void main(String[] args) {
        ImportParams params = new ImportParams();
        params.setTitleRows(1);
        params.setHeadRows(1);
        long start = new Date().getTime();
        List<Map<String, Object>> list = ExcelImportUtil.importExcel(new File("execl/easypoi-user2.xls"),
                Map.class, params);
        System.out.println(new Date().getTime() - start);
        System.out.println(JSONArray.toJSONString(list));
    }

}