使用excel文件导入数据，整合mongodb实现打卡签到系统
环境参数
开发工具：IDEA 基础环境：Maven+JDK8 主要技术：SpringBoot、Mongodb SpringBoot版本：2.2.6实现步骤如下：
1.添加依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- excel工具 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.0.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
2.实体层
3.业务service层
4. service实现层
package com.ckf.mongodb_punch.service.impl; import com.ckf.mongodb_punch.mapper.AttendRepository; import com.ckf.mongodb_punch.entity.Attend; import com.ckf.mongodb_punch.service.AttendService; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.mongodb.core.MongoTemplate; import org.springframework.data.mongodb.core.query.Criteria; import org.springframework.data.mongodb.core.query.Query; import org.springframework.data.mongodb.core.query.Update; import org.springframework.stereotype.Service; import org.springframework.web.multipart.MultipartFile; import java.io.IOException; import java.util.ArrayList; import java.util.List; @Service public class AttendServiceImpl implements AttendService { @Autowired private AttendRepository attendRepository; @Autowired private MongoTemplate mongoTemplate; /** * 上传文件 * @param classes * @param nameListExcel * @return */ @Override public String upload(String classes, MultipartFile nameListExcel) { String result = "no"; if (nameListExcel == null) { return result; } //实例化对象列表，用于存储Excel中的数据
List<Attend> attendList = new ArrayList<Attend>(); //读取文件对象nameListExcel 中的数据（读取Excel中每一行数据，存到对象，存到对象列表中）
try { //根据路径获取这个操作excel的实例
HSSFWorkbook wb = new HSSFWorkbook(nameListExcel.getInputStream()); //根据页面index 获取sheet页
HSSFSheet sheet = wb.getSheetAt(0); HSSFRow row = null; //循环sesheet页中数据从第二行开始，第一行是标题
for (int i = 1; i < sheet.getPhysicalNumberOfRows(); i++) { //获取每一行数据
row = sheet.getRow(i); Attend attend = new Attend(); //下面cellnum对应着下标，id是第一位对应着下标为0，name是第二位对应的下标为1,等等..
attend.setId(Integer.valueOf((int) row.getCell(0).getNumericCellValue())); attend.setName(row.getCell(1).getStringCellValue()); attend.setSign(Integer.valueOf((int) row.getCell(2).getNumericCellValue())); attendList.add(attend); } } catch (IOException e) { e.printStackTrace(); } System.out.println("解析Excel中的数据:" + attendList); /** * 如果成功就，写入mongodb中 */ attendRepository.saveAll(attendList); result = "ok"; return result; } /** * 签到 * @param name * @return */ @Override public String sign(String name) { Query query = Query.query(Criteria.where("name").is(name)); //局部修改的内容
Update update = new Update(); update.set("sign", 1); //attend 集合名 对应实体的集合名
mongoTemplate.updateFirst(query, update, "attend"); return "ok"; } /** * 全查询学生信息 * @param sign * @return */ @Override public List<Attend> findAllBySign(Integer sign) { return attendRepository.findAllBySign(sign); } }
