Vaccination Management System – Features, Architecture, and Core Backend Code

The system is designed to manage personal vaccination records, travel itineraries, medical histories, risk‑area data, nucleic‑acid test reports, epidemic news, and related knowledge. It defines two user roles: an administrator who can manage all users' information and a regular user who can only manage their own vaccination data and view administrator‑published epidemic information.

Technical stack: Spring Boot, Spring MVC, MyBatis, Layui front‑end framework, MySQL 5.7 database, Java language, JDK 1.8. Development tools include IntelliJ IDEA or Eclipse.

Project identifier: BS-XX-105.

Key functional modules (illustrated with screenshots in the original article) include user registration, login, vaccination management, case‑history management, nucleic‑acid test reporting, travel management, risk‑area management, epidemic‑prevention knowledge management, personal profile management, and system user management.

Core backend code (REST controllers) is provided below:

package com.vaccination.controller;

import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.vaccination.entity.CaseHistory;
import com.vaccination.entity.User;
import com.vaccination.service.CaseHistoryService;
import com.vaccination.service.UserService;
import com.vaccination.util.PageRequest;
import com.vaccination.util.PageResponse;
import com.vaccination.util.Result;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import java.text.SimpleDateFormat;
import java.util.List;

@RestController
public class CaseHistoryController {

    @Autowired
    private CaseHistoryService caseHistoryService;
    @Autowired
    private UserService userService;

    @PostMapping("/listCaseHistory")
    public PageResponse listCaseHistory(HttpServletRequest request, PageRequest page) {
        String loginUser = (String) request.getSession().getAttribute("loginUser");
        User user = JSONObject.parseObject(loginUser, User.class);
        if (user == null) {
            PageResponse pageResponse = new PageResponse();
            pageResponse.setMsg("请登陆");
            return pageResponse;
        }
        if (user.getRole() == 2) {
            user.setId(-1L);
        }
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        IPage<CaseHistory> iPage = caseHistoryService.listCaseHistory(new Page<>(page.getPage(), page.getLimit()), user.getId());
        List<CaseHistory> records = iPage.getRecords();
        records.forEach(item -> {
            if (StringUtils.isBlank(item.getUsername()) && item.getUserId() != null) {
                User byId = userService.getById(item.getUserId());
                if (byId != null) {
                    item.setUsername(byId.getName());
                    item.setUserIdentity(byId.getIdentityNum());
                }
            }
            if (item.getHappenTime() != null) {
                item.setHappenTimeStr(dateFormat.format(item.getHappenTime()));
            }
        });
        return new PageResponse("0", "请求成功", iPage.getTotal(), records);
    }

    @GetMapping("/delCaseHistory")
    public Result delCaseHistory(Long id) {
        caseHistoryService.removeById(id);
        return Result.success("删除成功");
    }

    @PostMapping("/saveCaseHistory")
    public Result saveInoculation(CaseHistory record, HttpServletRequest request) throws ParseException {
        String loginUser = (String) request.getSession().getAttribute("loginUser");
        User user = JSONObject.parseObject(loginUser, User.class);
        if (user == null) {
            return Result.error("请登陆");
        }
        record.setUserId(user.getId());
        if (StringUtils.isNoneBlank(record.getUsername())) {
            User byUsername = userService.getByUsername(record.getUsername());
            if (byUsername == null) {
                User newUser = new User();
                newUser.setUsername(record.getUsername());
                newUser.setName(record.getUsername());
                newUser.setPassword("123456");
                newUser.setRole(1);
                newUser.setStatus(1);
                userService.save(newUser);
                byUsername = newUser;
            }
            record.setUserId(byUsername.getId());
        }
        if (StringUtils.isNoneBlank(record.getHappenTimeStr())) {
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
            record.setHappenTime(dateFormat.parse(record.getHappenTimeStr()));
        }
        caseHistoryService.save(record);
        return Result.success("添加成功");
    }

    @PostMapping("/updateCaseHistory")
    public Result updateInoculation(CaseHistory record) throws ParseException {
        if (record.getId() == null) {
            return Result.error("更新失败");
        }
        if (StringUtils.isNoneBlank(record.getHappenTimeStr())) {
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
            record.setHappenTime(dateFormat.parse(record.getHappenTimeStr()));
        } else {
            record.setHappenTime(null);
        }
        caseHistoryService.updateById(record);
        return Result.success("更新成功");
    }
}

Additional controllers for inoculation records, epidemic‑prevention knowledge, and page navigation follow the same pattern, handling CRUD operations, session validation, role‑based access control, and date formatting.

The article also includes visual representations of the database schema and UI screens for each functional module, providing a comprehensive overview of the system’s design and implementation.