easypoi实现Excel文件导入导出
使用easypoi做导入导出功能
1. 引入依赖
cn.afterturn
easypoi-base
4.1.0
cn.afterturn
easypoi-web
4.1.0
cn.afterturn
easypoi-annotation
4.1.0
2.在pojo类上使用注解
import cn.afterturn.easypoi.excel.annotation.Excel;
import cn.afterturn.easypoi.excel.annotation.ExcelTarget;
import com.baomidou.mybatisplus.annotation.*;
import lombok.Data;
@Data
@ExcelTarget("LitemallstoneMian")
public class LitemallStoneMain implements Serializable {
public static final Boolean NOT_DELETED = false;
public static final Boolean IS_DELETED = true;
@TableId(value = "id", type = IdType.ID_WORKER_STR)
private Integer id;
@Excel(name = "入库编号",height = 20,width = 22,isImportField = "true_st")
private String code;
@Excel(name = "仓库ID",height = 20,width = 20,isImportField = "true_st")
private Integer warehouseId;
@Excel(name = "商户ID",height = 20,width = 20,isImportField = "true_st")
private Integer bid;
@Excel(name = "主石名称",height = 20,width = 20,isImportField = "true_st")
private String name;
@Excel(name = "主石类型",height = 20,width = 20,isImportField = "true_st")
private String category;
@Excel(name = "主石等级",height = 20,width = 20,isImportField = "true_st")
private String grading;
@Excel(name = "主石重量",height = 20,width = 20,isImportField = "true_st")
private String carat;
@Excel(name = "主石颜色",height = 20,width = 20,isImportField = "true_st")
private String colour;
@Excel(name = "主石净度",height = 20,width = 20,isImportField = "true_st")
private String clarity;
@Excel(name = "主石切工",height = 20,width = 20,isImportField = "true_st")
private String cut;
@Excel(name = "主石形状",height = 20,width = 20,isImportField = "true_st")
private String shape;
@Excel(name = "主石抛光",height = 20,width = 20,isImportField = "true_st")
private String polishing;
@Excel(name = "主石对称",height = 20,width = 20,isImportField = "true_st")
private String symmetry;
@Excel(name = "主石荧光",height = 20,width = 20,isImportField = "true_st")
private String flourescence;
@Excel(name = "主石证书类型",height = 20,width = 20,isImportField = "true_st")
private String certificateType;
@Excel(name = "主石证书编号",height = 20,width = 20,isImportField = "true_st")
private String certificateCode;
@Excel(name = "成本价",height = 20,width = 20,isImportField = "true_st")
private String cost;
@Excel(name = "条形码",height = 20,width = 20,isImportField = "true_st")
private String barCode;
@Excel(name = "创建时间",databaseFormat = "yyyyMMddHHmmss",format = "yyyy-MM-dd",width = 20)
private Date addTime;
@Excel(name = "更新时间",databaseFormat = "yyyyMMddHHmmss" ,format = "yyyy-MM-dd",width = 20)
private Date updateTime;
@ApiModelProperty(value = "状态,0正常,1上架,2下架,3锁定,4盘点,5已售")
private Integer status;
//该属性是为了实现该status值呈现中文状态
@Excel(name = "状态",height = 20,width = 20,isImportField = "true_st")
private String statuses;
private Boolean deleted;
public void andLogicalDeleted(boolean deleted) {
setDeleted(deleted ? IS_DELETED : NOT_DELETED);
}
public LitemallStoneMain() {
}
public LitemallStoneMain(Integer warehouseId, Integer bid,
String code, String name, String category) {
this.warehouseId = warehouseId;
this.bid = bid;
this.code = code;
this.name = name;
this.category = category;
}
}
@Excel注解是用在你需要导入导出的字段名上，具体的字段使用方法介绍可以浏览easypoi开源文档。
@Data这个注解是lombok的,这里不在做过多赘述，这里的目的是自动生成get和set方法。
这里要注意的是一定要把无参构造和有参构造方法都写出来，因为后面在导入的时候需要用到，有参构造方法只需要生成你加了@Excel注解的字段即可。
3.dao层方法
@Mapper
public interface LitemallStoneMainMapper{
//批量插入
Integer batchInsert(List stoneMainList);
}
因为后面要做导入操作，所以这里的方法是批量插入方法。
4.Mapper.xml中SQL语句
INSERT INTO litemall_stone_main(warehouse_id,bid,code,`name`,category,grading,carat,
colour,clarity,cut,shape,polishing,symmetry,flourescence,
certificate_type,certificate_code,cost,bar_code,add_time,
update_time,status)
VALUES
(#{stoneMain.warehouseId,jdbcType=INTEGER},#{stoneMain.bid,jdbcType=INTEGER},#{stoneMain.code,jdbcType=VARCHAR},
#{stoneMain.name,jdbcType=VARCHAR},#{stoneMain.category,jdbcType=VARCHAR},#{stoneMain.grading,jdbcType=VARCHAR},
#{stoneMain.carat,jdbcType=VARCHAR},#{stoneMain.colour,jdbcType=VARCHAR},#{stoneMain.clarity,jdbcType=VARCHAR},
#{stoneMain.cut,jdbcType=VARCHAR},#{stoneMain.shape,jdbcType=VARCHAR},#{stoneMain.polishing,jdbcType=VARCHAR},
#{stoneMain.symmetry,jdbcType=VARCHAR},#{stoneMain.flourescence,jdbcType=VARCHAR},#{stoneMain.certificateType,jdbcType=VARCHAR},
#{stoneMain.certificateCode,jdbcType=VARCHAR},#{stoneMain.cost,jdbcType=VARCHAR},#{stoneMain.barCode,jdbcType=VARCHAR},
#{stoneMain.addTime,jdbcType=TIMESTAMP},#{stoneMain.updateTime,jdbcType=TIMESTAMP},#{stoneMain.status,jdbcType=INTEGER})
5.service层
因为这个项目是使用分布式来写的，所以会有一个japp和jweb2个模块，所以就存在2个service层。这里简单说一下2个模块的用处:japp是用来做数据库的操作，jweb层是不涉及到数据库的操作的。
japp模块service层方法
//批量插入
public Integer batchInsert(List stoneMainList) {
for (LitemallStoneMain stoneMain : stoneMainList) {
String statuses=stoneMain.getStatuses();
//通过时间戳+6位随机数生成入库编号(code)
int r = (int) ((Math.random() * 9 + 1) * 100000);
String num = String.valueOf(r);
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String date = sdf.format(new Date());
String code = date + num;
stoneMain.setCode(code);
stoneMain.setAddTime(new Date());
stoneMain.setUpdateTime(new Date());
//0正常,1上架,2下架,3锁定,4盘点,5已售
switch (statuses){
case "正常":
stoneMain.setStatus(0);
break;
case "上架":
stoneMain.setStatus(1);
break;
case "下架":
stoneMain.setStatus(2);
break;
case "锁定":
stoneMain.setStatus(3);
break;
case "盘点":
stoneMain.setStatus(4);
break;
case "已售":
stoneMain.setStatus(5);
break;
default:
break;
}
}
return stoneMainMapper.batchInsert(stoneMainList);
}
这只是生成时间戳和6位随机数生成入库编号的方法，用不到可以忽略不计哈…
jweb模块service层中方法
//批量插入
public Integer batchInsert(List stoneMainList) {
try {
ResultVO resultVO=null;
//mysql不要一次性插入超过999条数据
if (stoneMainList.size() > 999) {
//分批次插入
Integer count = stoneMainList.size() / 999;
//分批次插入的集合
List subList = new ArrayList<>();
for (Integer i = 1; i <= count; i++) {
//截取list集合 0-999
subList.add(stoneMainList.subList((i - 1) * 999, i * 999));
if (i == count && stoneMainList.size() % 999 != 0) {
//有999的余数
subList.add(stoneMainList.subList(i * 999, stoneMainList.size() - 1));
}
}
//分批次插入
for (List list : subList) {
resultVO = stoneMainClient.batchInsert(list);
}
return (Integer) resultVO.getData();
} else {
resultVO = stoneMainClient.batchInsert(stoneMainList);
return (Integer) resultVO.getData();
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
ResultVO是我们自己封装的一个类，所以ResultVO result=null;可以改成Integer result=0;
5.Controller层
这里的的controller层是jweb层，也就是最终对接前端接口的前端控制层
@RestController
@RequestMapping("/admin/stoneMain/")
public class AdminStoneMainController {
@Autowired
private LitemallStoneMainService stoneMainService;
Logger log= LoggerFactory.getLogger(AdminStoneMainController.clas s);
/**
* 通过easypoi导出excel(下载)
*
* @param response
*/
@RequestMapping("export")
@ApiOperation(value = "导出excel", httpMethod = "GET")
public void excelExport(HttpServletResponse response) {
try {
// 设置响应输出的头类型
response.setHeader("content-Type", "application/vnd.ms-excel");
// 下载文件的默认名称
response.setHeader("Content-Disposition", "attachment;filename=stoneMain.xls");
// =========easypoi部分
ExportParams exportParams = new ExportParams("主石库存表","主石库存");
// exportParams.setDataHanlder(null);//和导入 一样可以设置一个handler来处理特殊数据
Workbook workbook = ExcelExportUtil.exportExcel(exportParams, LitemallStoneMain.class, data());
workbook.write(response.getOutputStream());
response.getOutputStream().close();
} catch (Exception e) {
log.error(e.getMessage(), e);
}
}
private List data() {
List list = stoneMainService.queryList();
for (LitemallStoneMain stoneMain : list) {
Integer status = stoneMain.getStatus();
//0正常,1上架,2下架,3锁定,4盘点,5已售
switch (status){
case 0:
stoneMain.setStatuses("正常");
break;
case 1:
stoneMain.setStatuses("上架");
break;
case 2:
stoneMain.setStatuses("下架");
break;
case 3:
stoneMain.setStatuses("锁定");
break;
case 4:
stoneMain.setStatuses("盘点");
break;
case 5:
stoneMain.setStatuses("已售");
break;
default:
break;
}
}
return list;
}
/**
* 导入excel
*
* @param file
*/
@RequestMapping("import")
@PostMapping(value = "/", headers = "content-type=multipart/form-data")
@ApiOperation(value = "导入excel", httpMethod = "POST")
public void excelImport(HttpServletRequest request, MultipartFile file) {
System.out.println("导入开始--->");
System.out.println("file--->" + file);
//构建解析execl的easypoi参数
ImportParams params = new ImportParams();
params.setTitleRows(1); //标题行
params.setHeadRows(1); //别名
try {
//读取数据
List list = ExcelImportUtil.importExcel(file.getInputStre am(), LitemallStoneMain.class, params);
//设置对象默认值
for (LitemallStoneMain stoneMain : list) {
System.out.println(stoneMain.toString());
}
Integer result = stoneMainService.batchInsert(list);
if (result > 0) {
System.out.println("导入成功");
} else {
System.out.println("导入失败");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
我把导入方法和导出方法写到一起，只是为了方便大家看，因为一般做了导出操作，肯定会做导入操作，其中导出操作方法是直接下载导出到本地，不是那种直接保存到本地，如果项目存在上线的可能，那么保存到本地实际上市保存到服务器上的，在本地是看不到，所以直接把导出文件下载到本地是比较方便的。
导出方法就比较简单的，很容易看明白。
在这里我没有去做验证操作，因为项目上线之后，只可能会在初期存在导入操作，中后期基本不存在导入操作，所以就没有加验证的方法