Java实现上传Excel文件并导出到数据库
1、导入依赖
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<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.20</version>
</dependency>
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2、domain
实体类的字段根据自己Excel的表头来决定，数据库的表字段最好和实体类一一对应
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import lombok.Data;
// Excel实体类
@Data
public class Detailed {
public Long id; // 主键
public String auditDate; // 审核日期
public Integer sceneId; // 场景id
public String sceneName; // 场景名称
public String entityid; // entityid
public Long housingResourcesId; // 房源id/实拍视频id
public Integer cityid; // cityid/城市id
public String firstInstanceOA; // 初审oa/一审审核人oa
public String firstInstance; // 初审方/一审核员部门名称
public String preliminaryResults; // 初审结果/一审审核结果
public String reasonsForFirstInstance; // 初审原因/一审审核原因
public String timeOfInitialExaminationAndStorage; // 初审入库时间
public String initialAuditTime; // 初审审核时间
public Double shenheshichang; // shenheshichang
public String timeoutStatus; // 超时状态
public String qualityInspectionResults; // 质检结果/质检审核结果
public String qualityInspectionReasons; // 质检原因/质检审核原因
public String qualificationStatus; // 质检合格原因
}
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3、utils
获取Excel表格中的数据,其中
// 获取目标单元格的值并存进对象中根据自己的实体类进行编写
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import com.iyunfish.tongcheng.domain.Detailed;
import org.apache.poi.ss.usermodel.*;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
public class ExcelUtils {
public static List<Detailed> excelToShopIdList(InputStream inputStream) throws IOException {
Workbook workbook = WorkbookFactory.create(inputStream);
inputStream.close();
// 在工作簿获取目标工作表
Sheet sheet = workbook.getSheetAt(0);
// 获取到最后一行
int physicalNumberOfRows = sheet.getPhysicalNumberOfRows();
// 该集合用来储存行对象
ArrayList<Detailed> detaileds = new ArrayList<>();
// 遍历整张表，从第二行开始，第一行的表头不要，循环次数不大于最后一行的值
for (int i = 1; i < physicalNumberOfRows; i++) {
// 该对象用来储存行数据
Detailed detailed = new Detailed();
// 获取当前行数据
Row row = sheet.getRow(i);
// 获取目标单元格的值并存进对象中
detailed.setAuditDate(row.getCell(0).getStringCellValue());
detailed.setSceneId(Integer.valueOf(row.getCell(1).getStringCellValue()));
detailed.setSceneName(row.getCell(2).getStringCellValue());
detailed.setEntityid(row.getCell(3).getStringCellValue());
detailed.setHousingResourcesId(Long.valueOf(row.getCell(4).getStringCellValue()));
detailed.setCityid(Integer.valueOf(row.getCell(5).getStringCellValue()));
detailed.setFirstInstanceOA(row.getCell(6).getStringCellValue());
detailed.setFirstInstance(row.getCell(7).getStringCellValue());
detailed.setPreliminaryResults(row.getCell(8).getStringCellValue());
detailed.setReasonsForFirstInstance(row.getCell(9).getStringCellValue());
detailed.setTimeOfInitialExaminationAndStorage(row.getCell(10).getStringCellValue());
detailed.setInitialAuditTime(row.getCell(11).getStringCellValue());
detailed.setShenheshichang(Double.valueOf(row.getCell(12).getStringCellValue()));
detailed.setTimeoutStatus(row.getCell(13).getStringCellValue());
detailed.setQualityInspectionResults(row.getCell(14).getStringCellValue());
detailed.setQualityInspectionReasons(row.getCell(15).getStringCellValue());
detailed.setQualificationStatus(row.getCell(16).getStringCellValue());
// 把对象放到集合里
detaileds.add(detailed);
System.out.println("获取到的当前行数据：" + detailed);
}
return detaileds;
}
}
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4、Controller
数据库表的id点上自增，这样添加的时候就不用再添加id了
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import com.iyunfish.tongcheng.domain.Detailed;
import com.iyunfish.tongcheng.service.ReadService;
import com.iyunfish.tongcheng.utils.ExcelUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import java.util.List;
@Controller
public class UploadController {
@Autowired
private ReadService readService;
@RequestMapping("/file/upload")
public void pubggupload(@RequestParam("file") MultipartFile file) throws Exception {
String name = file.getOriginalFilename();
if(name.length() < 5 || !name.substring(name.length() - 5).equals(".xlsx")) {
throw new Exception("文件格式错误");
}
// 获取Excel中的数据
List<Detailed> detaileds = ExcelUtils.excelToShopIdList(file.getInputStream());
// 向数据库遍历添加数据库
for (int i = 0; i < detaileds.size(); i++) {
// 获取行信息
Detailed detailed = detaileds.get(i);
// 先根据eneityid查询数据库里有没有一样的，没有就进行添加
List<Long> longs = readService.queryDetailedByEneityid(detailed.getEntityid());
if (longs.size() <= 0) {
readService.addDetailed(detailed);
} else {
System.out.println("error：该条信息已存在 message：" + detailed);
}
}
}
}
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逻辑层接口和实现类没有逻辑，直接到控制层的xml文件
5、xml
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<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.iyunfish.tongcheng.mapper.ReadMapper">
<select id="queryDetailedByEneityid" parameterType="String" resultType="com.itZhao.domain.Detailed">
SELECT
id
FROM
detailed
WHERE
entityid = #{entityid}
</select>
<insert id="addDetailed" parameterType="com.iyunfish.tongcheng.domain.Detailed">
INSERT INTO `tongcheng`.`detailed` (
`audit_date`,
`scene_id`,
`scene_name`,
`entityid`,
`housing_resources_id`,
`cityid`,
`firstInstanceOA`,
`firstInstance`,
`preliminary_results`,
`reasons_for_firstInstance`,
`time_ofInitial_examination_and_storage`,
`initial_audit_time`,
`shenheshichang`,
`timeout_status`,
`quality_inspection_results`,
`quality_inspection_reasons`,
`qualification_status`
)
VALUES
(#{read.auditDate}, #{read.sceneId}, #{read.sceneName}, #{read.entityid}, #{read.housingResourcesId}, #{read.cityid}, #{read.firstInstanceOA}, #{read.firstInstance}, #{read.preliminaryResults}, #{read.reasonsForFirstInstance}, #{read.timeOfInitialExaminationAndStorage}, #{read.initialAuditTime}, #{read.shenheshichang}, #{read.timeoutStatus}, #{read.qualityInspectionResults}, #{read.qualityInspectionReasons}, #{read.qualificationStatus})
</insert>
</mapper>
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原文链接：https://www.jianshu.com/p/79ab13472cc6