使用Mongodb实现打卡签到系统的实例代码

 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>

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
  ListAttend> attendList = new ArrayListAttend>(); //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 ListAttend> findAllBySign(Integer sign) { return attendRepository.findAllBySign(sign); } }

package com.ckf.mongodb_punch.controller; 
import com.ckf.mongodb_punch.entity.Attend; 
import com.ckf.mongodb_punch.service.AttendService; 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController; 
import org.springframework.web.multipart.MultipartFile; 
import java.util.HashMap; import java.util.List; 
import java.util.Map; 
@RestController public class AttendController
{ 
@Autowired private AttendService attendService;
@GetMapping("/sign") 
public String sign(String name)
{ /** * 将名字传给服务层，mongodb修改登录状态 
*/ attendService.sign(name); return "ok"; 
} 
/** * 上传文件 * @param classes * @param nameListExcel * @return 
*/ @PostMapping("/upload") 
public String upload(String classes, MultipartFile nameListExcel)
{
/** * 接收到前台传过来的文件对象，交给service层或者Excel工具类来解析数据
* System.out.println("接收前台表单提交数据："+classes+nameListExcel);
*/ String result = attendService.upload(classes,nameListExcel);
return result;
} 
/** * 查询未签到同学 和已签到同学
* @return */ @GetMapping("/list")
public Map list(){ Map result = new HashMapString,Object>(); /** * 已签到 */ ListAttend> 
complete = attendService.findAllBySign(1);
result.put("complete",complete); /** * 未签到 */ ListAttend> 
incomplete = attendService.findAllBySign(0);
result.put("incomplete",incomplete); 
return result;
} 
}

spring: 
data: 
mongodb: 
uri: 
mongodb://ckf_user:123456@192.168.85.154:27017/attend_db

spring: 
data: 
mongodb: 
uri:
mongodb://localhost:27017/attend_db

!DOCTYPE html>
html lang="en">
head>
 meta charset="UTF-8">
 title>考勤管理页面/title>
 style> #complete,#incomplete{ width: 50%; float: left; } /style>
 script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js" type="text/javascript" charset="utf-8">/script>
/head>
body>

 h3>导入名单/h3> 班级名称： input type="text" name="classes" id="classes"/> 请选择导入文件 input type="file" name="nameList" id="nameList"/>
 input type="button" id="upload" value="上传">
 hr/>

 div id="incomplete">
  h3>未签到的/h3>
  p>/p>

 /div>

 div id="complete">
  h3>已签到/h3>
  p>/p>
 /div>

/body>
script type="text/javascript"> $(function () { //初始化页面查询结果
 $.ajax({ type:"get", url:"/list", success:function(data){ console.log(data); var complete =""; var incomplete =""; $.each(data.complete,function (index,object) { complete += object.id +"nbsp;" +object.name +"br/>"; }) $("#complete p").html(complete); $.each(data.incomplete,function (index,object) { incomplete += object.id +"nbsp;" +object.name +"br/>"; }) $("#incomplete p").html(incomplete); } }); $("body").on("click","#upload",function(){ //将数据打包到formData对象中
   var formData = new FormData(); formData.append("classes",$("#classes").val()); formData.append("nameListExcel",$("#nameList")[0].files[0]); $.ajax({ type:"post", url:"/upload", //dataType:"json",
 data:formData, processData: false, contentType: false, success:function(data){ console.log(data); if(data=="ok"){ alert("上传成功，即将刷新页面") //刷新当前页面
 location.reload(); }else { alert("上传失败，请重新上传") } } }); }) }) /script>
/html>

!DOCTYPE html>
html lang="en">
head>
 meta charset="UTF-8">
 title>签到页面/title>
 script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js" type="text/javascript" charset="utf-8">/script>
/head>
body> 请输入你的姓名:input type="text" id="name"/>
 input type="button" id="sign" value="签到"/>

/body>
script type="text/javascript"> $(function () { $("body").on("click","#sign",function(){ $.ajax({ type:"get", url:"/sign", data:{"name":$("#name").val()}, success:function(data){ console.log(data); if(data=="ok"){ alert("签到成功，返回签到页面") //刷新当前页面
 location.reload(); }else { alert("签到成功，请重新签到") } } }); }) }) /script>
/html>