@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 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);
}
}
- LocalJsonUtil工具类,可以直接从resources目录下获取JSON数据并转化为对象,例如此处使用的members.json;
- 运行项目,直接通过Swagger访问接口,注意在Swagger中访问接口无法直接下载,需要点击返回结果中的下载按钮才行,访问地址:http://localhost:8088/swagger-ui/
- 下载完成后,查看下文件,一个标准的Excel文件已经被导出了。
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。
- 在Controller中添加会员信息导入的接口,这里需要注意的是使用@RequestPart注解修饰文件上传参数,否则在Swagger中就没法显示上传按钮了;
@Controller
@Api(tags = "EasyPoiControll
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er", 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 list = ExcelimportUtil.importExcel(
file.getInputStream(),
Member.class, params);
return CommonResult.success(list);
} catch (Exception e) {
e.printStackTrace();
return CommonResult.failed(“导入失败!”);
}
}
}
- 然后在Swagger中测试接口,选择之前导出的Excel文件即可,导入成功后会返回解析到的数据。
复杂导出
====
当然EasyPoi也可以实现更加复杂的Excel *** 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!
- 首先添加商品对象Product,用于封装商品信息;
@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;
}
- 然后添加订单对象Order,订单和会员是一对一关系,使用@ExcelEntity注解表示,订单和商品是一对多关系,使用@ExcelCollection注解表示,Order就是我们需要导出的嵌套订单数据;
@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 productList;
}
- 接下来在Controller中添加导出订单列表的接口,由于有些会员信息我们不需要导出,可以调用ExportParams中的setExclusions方法排除掉;
@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 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);
}
}
- 在Swagger中访问接口测试,导出订单列表对应Excel;
- 下载完成后,查看下文件,EasyPoi导出复杂的Excel也是很简单的!
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。
- 我们需要添加一个处理器继承默认的ExcelDataHandlerDefaultImpl类,然后在exportHandler方法中实现自定义处理逻辑;
public class MemberExcelDataHandler extends ExcelDataHandlerDefaultImpl {
@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);
}
}
- 然后修改Controller中的接口,调用MemberExcelDataHandler处理器的setNeedHandlerFields设置需要自定义处理的字段,并调用ExportParams的setDataHandler设置自定义处理器;
@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 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();
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