easyPoi官方文档：http://easypoi.mydoc.io/
通过Mybatis generator生成相关Tbxxx，TbxxxExample，TbxxxMapper.java，TbxxxMapper.xml，TbxxxService
引入依赖：
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-base</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-web</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-annotation</artifactId>
<version>3.2.0</version>
</dependency>
注解实体类：
import cn.afterturn.easypoi.excel.annotation.Excel;
import com.yun.cloud.base.model.BaseModel;
import lombok.Data;
import java.io.Serializable;
@Data
public class TbProductStandard extends BaseModel implements Serializable {
private String id;
@Excel(name = "code")
private String code;
@Excel(name = "parent_code")
private String parentId;
@Excel(name = "type_name")
private String typeName;
}
相关注解介绍：
@Excel 作用到实体类字段上面,是对Excel一列的一个描述
@ExcelCollection 表示一个集合,主要针对一对多的导出,比如一个老师对应多个科目,科目就可以用集合表示
@ExcelEntity 表示一个继续深入导出的实体,但他没有太多的实际意义,只是告诉系统这个对象里面同样有导出的字段
@ExcelIgnore 和名字一样表示这个字段被忽略跳过这个导导出
@ExcelTarget 这个是作用于最外层的对象,描述这个对象的id,以便支持一个对象可以针对不同导出做出不同处理
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原文链接：https://blog.csdn.net/weixin_41922289/article/details/100191112
设置excel导入导出工具类：
import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
public class ProductExcelUtils {
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
boolean isCreateHeader, HttpServletResponse response) {
ExportParams exportParams = new ExportParams(title, sheetName);
exportParams.setCreateHeadRows(isCreateHeader);
defaultExport(list, pojoClass, fileName, response, exportParams);
}
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
HttpServletResponse response) {
defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
}
public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
defaultExport(list, fileName, response);
}
private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response,
ExportParams exportParams) {
Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
if (workbook != null)
;
downLoadExcel(fileName, response, workbook);
}
private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
try {
response.setCharacterEncoding("UTF-8");
response.setHeader("content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
workbook.write(response.getOutputStream());
} catch (IOException e) {
// throw new NormalException(e.getMessage());
}
}
private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
if (workbook != null)
;
downLoadExcel(fileName, response, workbook);
}
public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) {
if (StringUtils.isBlank(filePath)) {
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List<T> list = null;
try {
list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
} catch (NoSuchElementException e) {
// throw new NormalException("模板不能为空");
} catch (Exception e) {
e.printStackTrace();
// throw new NormalException(e.getMessage());
}
return list;
}
public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows,
Class<T> pojoClass) {
if (file == null) {
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List<T> list = null;
try {
list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
} catch (NoSuchElementException e) {
// throw new NormalException("excel文件不能为空");
} catch (Exception e) {
// throw new NormalException(e.getMessage());
System.out.println(e.getMessage());
}
return list;
}
}
controller层:
import com.yun.cloud.base.result.Result;
import com.yun.cloud.gap.business.ProductStandardBusiness;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
@RestController
@RequestMapping("/productstandard")
public class ProductStandardController {
@Autowired
private ProductStandardBusiness productStandardBusiness;
/**
* 导入excel
* @param file
* @return
*/
@PostMapping("/importExcel")
public Result importExcel(@RequestParam("file") MultipartFile file) {
return productStandardBusiness.importExcel(file);
}
}
business层：
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.result.ExcelImportResult;
import com.alibaba.fastjson.JSONObject;
import com.yun.cloud.base.result.Result;
import com.yun.cloud.base.utils.IdGenUtil;
import com.yun.cloud.gap.model.TbProductStandard;
import com.yun.cloud.gap.model.TbProductStandardExample;
import com.yun.cloud.gap.service.TbProductStandardService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import java.util.List;
@Slf4j
@Service("ProductStandardBusiness")
public class ProductStandardBusiness {
@Autowired
private TbProductStandardService tbProductStandardService;
@Value("${machine}")
private int machineId;
@Value("${datacenter}")
private int dataCenterId;
public Result importExcel(MultipartFile file) {
ImportParams importParams = new ImportParams();
// 数据处理
importParams.setHeadRows(1);
importParams.setTitleRows(1);
// 需要验证
importParams.setNeedVerfiy(false);
try {
ExcelImportResult<TbProductStandard> result = ExcelImportUtil.importExcelMore(file.getInputStream(), TbProductStandard.class,
importParams);
List<TbProductStandard> tbProductStandardList = result.getList();
for (TbProductStandard tbProductStandard : tbProductStandardList) {
log.info("从Excel导入数据到数据库的详细为 ：{}", JSONObject.toJSONString(tbProductStandard));
//保存到mysql
String id = IdGenUtil.getNextId(machineId,dataCenterId);
tbProductStandard.setId(id);
int i = tbProductStandardService.insertSelective(tbProductStandard);
if(i < 1){
log.error("保存失败");
return Result.err("保存失败");
}
}
log.info("从Excel导入数据一共 {} 行 ", tbProductStandardList.size());
} catch (Exception e) {
log.error("导入失败：{}", e.getMessage());
return Result.err("导入失败");
}
return Result.suc();
}
}
测试
springboot集成easyPoi实现excel数据导入到Mysql数据库
原文：https://www.cnblogs.com/horseweed/p/15134814.html