分享一个使用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
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); } }

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 HashMap<String,Object>(); /** * 已签到 */ List<Attend> 
complete = attendService.findAllBySign(1);
result.put("complete",complete); /** * 未签到 */ List<Attend> 
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>