springboot实现excel导入和导出（springbootpoiexcel导出）

在我们平时工作中经常会遇到要操作Excel的功能，比如导出个用户信息或者订单信息的Excel报表。你肯定听说过POI这个东西，可以实现。但是POI实现的API确实很麻烦，它需要写那种逐行解析的代码（类似Xml解析）。今天给大家推荐一款非常好用的Excel导入导出工具EasyPoi，希望对大家有所帮助！

springbootpoiexcel导出

EasyPoi简介

用惯了SpringBoot的朋友估计会想到，有没有什么办法可以直接定义好需要导出的数据对象，然后添加几个注解，直接自动实现Excel导入导出功能？

EasyPoi正是这么一款工具，如果你不太熟悉POI，想简单地实现Excel操作，用它就对了！

EasyPoi的目标不是替代POI，而是让一个不懂导入导出的人也能快速使用POI完成Excel的各种操作，而不是看很多API才可以完成这样的工作。

集成

在SpringBoot中集成EasyPoi非常简单，只需添加如下一个依赖即可，真正的开箱即用！

<dependency>    <groupId>cn.afterturn</groupId>    <artifactId>easypoi-spring-boot-starter</artifactId>    <version>4.4.0</version></dependency>

使用

接下来介绍下EasyPoi的使用，以会员信息和订单信息的导入导出为例，分别实现下简单的单表导出和具有关联信息的复杂导出。

简单导出

我们以会员信息列表导出为例，使用EasyPoi来实现下导出功能，看看是不是够简单！

/** * 购物会员 * Created by macro on 2021/10/12. */@Data@EqualsAndHashCode(callSuper = false)public class Member {    @Excel(name = "ID", width = 10)    private Long id;    @Excel(name = "用户名", width = 20, needMerge = true)    private String username;    private String password;    @Excel(name = "昵称", width = 20, needMerge = true)    private String nickname;    @Excel(name = "出生日期", width = 20, format = "yyyy-MM-dd")    private Date birthday;    @Excel(name = "手机号", width = 20, needMerge = true, desensitizationRule = "3_4")    private String phone;    private String icon;    @Excel(name = "性别", width = 10, replace = {"男_0", "女_1"})    private Integer gender;}

/** * EasyPoi导入导出测试Controller * Created by macro on 2021/10/12. */@Controller@Api(tags = "EasyPoiController", description = "EasyPoi导入导出测试")@RequestMapping("/easyPoi")public class EasyPoiController {    @ApiOperation(value = "导出会员列表Excel")    @RequestMapping(value = "/exportMemberList", method = RequestMethod.GET)    public void exportMemberList(ModelMap map,                                 HttpServletRequest request,                                 HttpServletResponse response) {        List<Member> memberList = LocalJsonUtil.getListFromJson("json/members.json", Member.class);        ExportParams params = new ExportParams("会员列表", "会员列表", ExcelType.XSSF);        map.put(NormalExcelConstants.DATA_LIST, memberList);        map.put(NormalExcelConstants.CLASS, Member.class);        map.put(NormalExcelConstants.PARAMS, params);        map.put(NormalExcelConstants.FILE_NAME, "memberList");        PoiBaseView.render(map, request, response, NormalExcelConstants.EASYPOI_EXCEL_VIEW);    }}

简单导入

导入功能实现起来也非常简单，下面以会员信息列表的导入为例。

/** * EasyPoi导入导出测试Controller * Created by macro on 2021/10/12. */@Controller@Api(tags = "EasyPoiController", description = "EasyPoi导入导出测试")@RequestMapping("/easyPoi")public class EasyPoiController {    @ApiOperation("从Excel导入会员列表")    @RequestMapping(value = "/importMemberList", method = RequestMethod.POST)    @ResponseBody    public CommonResult importMemberList(@RequestPart("file") MultipartFile file) {        ImportParams params = new ImportParams();        params.setTitleRows(1);        params.setHeadRows(1);        try {            List<Member> list = ExcelImportUtil.importExcel(                    file.getInputStream(),                    Member.class, params);            return CommonResult.success(list);        } catch (Exception e) {            e.printStackTrace();            return CommonResult.failed("导入失败！");        }    }}

复杂导出

当然EasyPoi也可以实现更加复杂的Excel操作，比如导出一个嵌套了会员信息和商品信息的订单列表，下面我们来实现下！

/** * 商品 * Created by macro on 2021/10/12. */@Data@EqualsAndHashCode(callSuper = false)public class Product {    @Excel(name = "ID", width = 10)    private Long id;    @Excel(name = "商品SN", width = 20)    private String productSn;    @Excel(name = "商品名称", width = 20)    private String name;    @Excel(name = "商品副标题", width = 30)    private String subTitle;    @Excel(name = "品牌名称", width = 20)    private String brandName;    @Excel(name = "商品价格", width = 10)    private BigDecimal price;    @Excel(name = "购买数量", width = 10, suffix = "件")    private Integer count;}

/** * 订单 * Created by macro on 2021/10/12. */@Data@EqualsAndHashCode(callSuper = false)public class Order {    @Excel(name = "ID", width = 10,needMerge = true)    private Long id;    @Excel(name = "订单号", width = 20,needMerge = true)    private String orderSn;    @Excel(name = "创建时间", width = 20, format = "yyyy-MM-dd HH:mm:ss",needMerge = true)    private Date createTime;    @Excel(name = "收货地址", width = 20,needMerge = true )    private String receiverAddress;    @ExcelEntity(name = "会员信息")    private Member member;    @ExcelCollection(name = "商品列表")    private List<Product> productList;}

/** * EasyPoi导入导出测试Controller * Created by macro on 2021/10/12. */@Controller@Api(tags = "EasyPoiController", description = "EasyPoi导入导出测试")@RequestMapping("/easyPoi")public class EasyPoiController {    @ApiOperation(value = "导出订单列表Excel")    @RequestMapping(value = "/exportOrderList", method = RequestMethod.GET)    public void exportOrderList(ModelMap map,                                HttpServletRequest request,                                HttpServletResponse response) {        List<Order> orderList = getOrderList();        ExportParams params = new ExportParams("订单列表", "订单列表", ExcelType.XSSF);        //导出时排除一些字段        params.setExclusions(new String[]{"ID", "出生日期", "性别"});        map.put(NormalExcelConstants.DATA_LIST, orderList);        map.put(NormalExcelConstants.CLASS, Order.class);        map.put(NormalExcelConstants.PARAMS, params);        map.put(NormalExcelConstants.FILE_NAME, "orderList");        PoiBaseView.render(map, request, response, NormalExcelConstants.EASYPOI_EXCEL_VIEW);    }}

自定义处理

如果你想对导出字段进行一些自定义处理，EasyPoi也是支持的，比如在会员信息中，如果用户没有设置昵称，我们添加下暂未设置信息。

/** * 自定义字段处理 * Created by macro on 2021/10/13. */public class MemberExcelDataHandler extends ExcelDataHandlerDefaultImpl<Member> {  @Override  public Object exportHandler(Member obj, String name, Object value) {    if("昵称".equals(name)){      String emptyValue = "暂未设置";      if(value==null){        return super.exportHandler(obj,name,emptyValue);      }      if(value instanceof String&&StrUtil.isBlank((String) value)){        return super.exportHandler(obj,name,emptyValue);      }    }    return super.exportHandler(obj, name, value);  }  @Override  public Object importHandler(Member obj, String name, Object value) {    return super.importHandler(obj, name, value);  }}

/** * EasyPoi导入导出测试Controller * Created by macro on 2021/10/12. */@Controller@Api(tags = "EasyPoiController", description = "EasyPoi导入导出测试")@RequestMapping("/easyPoi")public class EasyPoiController {    @ApiOperation(value = "导出会员列表Excel")    @RequestMapping(value = "/exportMemberList", method = RequestMethod.GET)    public void exportMemberList(ModelMap map,                                 HttpServletRequest request,                                 HttpServletResponse response) {        List<Member> memberList = LocalJsonUtil.getListFromJson("json/members.json", Member.class);        ExportParams params = new ExportParams("会员列表", "会员列表", ExcelType.XSSF);        //对导出结果进行自定义处理        MemberExcelDataHandler handler = new MemberExcelDataHandler();        handler.setNeedHandlerFields(new String[]{"昵称"});        params.setDataHandler(handler);        map.put(NormalExcelConstants.DATA_LIST, memberList);        map.put(NormalExcelConstants.CLASS, Member.class);        map.put(NormalExcelConstants.PARAMS, params);        map.put(NormalExcelConstants.FILE_NAME, "memberList");        PoiBaseView.render(map, request, response, NormalExcelConstants.EASYPOI_EXCEL_VIEW);    }}

总结

体验了一波EasyPoi，它使用注解来操作Excel的方式确实非常好用。如果你想生成更为复杂的Excel的话，可以考虑下它的模板功能。

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