springboot集成easy-exel 简单使用

1、导入依赖

<!-- easyexcel -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>easyexcel</artifactId>
    <version>3.2.1</version>
</dependency>
<!-- easyexcel -->

2、导出对象

@Data
@ExcelIgnoreUnannotated
@AllArgsConstructor
public class Student{
    @ExcelProperty("编号")
    @ColumnWidth(20)
    private Integer code;

    @ExcelProperty("名称")
    @ColumnWidth(20)
    private String name;

    @ExcelProperty("详情")
    @ColumnWidth(20)
    private String desc;

    @ExcelProperty("备注")
    @ColumnWidth(20)
    private String remark;
}

3、导出

@PostMapping(value = "/export")
public void export(HttpServletResponse response) {
    try {
        // 获取导出集合 略
        List<Student> list = getList();
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        response.setCharacterEncoding("utf-8");
        String fileName = URLEncoder.encode("导出结果", "UTF-8").replace("\\+", "%20");
        response.addHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename" + fileName + ".xlsx");
        EasyExcelFactory.write(response.getOutputStream())
                .head(ForeignCardExportVO.class)
                .excelType(ExcelTypeEnum.XLSX)
                .sheet("第一页")
                .doWrite(list);
    } catch (Exception e) {
        log.error("export error",e);
    }
}

4、导入

@GetMapping(value = "/importData")
public void importData(@RequestParam MultipartFile fileName) throws IOException {
    // 这里默认每次会读取20条数据 然后返回过来 直接调用使用数据就行
    // 具体需要返回多少行可以在`PageReadListener`的构造函数设置
    AtomicInteger finalCount = new AtomicInteger(0);
    EasyExcelFactory.read(fileName.getInputStream(), Student.class, new PageReadListener<Student>(list -> {
        log.info("解析到一条数据:{}", list.size());
        for (Student demoData : list) {
            if (finalCount.get() >= 30) {
                log.info("count > 30,{}",demoData.toString());
                continue;
            }
            log.info(demoData.toString());
            finalCount.getAndIncrement();
        }
    }, 20)).sheet().doRead();
}