项目介绍

21世纪的今天，随着社会的不断发展与进步，人们对于信息科学化的认识，已由低层次向高层次发展，由原来的感性认识向理性认识提高，管理工作的重要性已逐渐被人们所认识，科学化的管理，使信息存储达到准确、快速、完善，并能提高工作管理效率，促进其发展。

论文主要是对在线考试系统进行了介绍，包括研究的现状，还有涉及的开发背景，然后还对系统的设计目标进行了论述，还有系统的需求，以及整个的设计方案，对系统的设计以及实现，也都论述的比较细致，最后对在线考试系统进行了一些具体测试。

本文以java为开发技术，后端ssm框架，数据库mysql，前端vue技术实现了一个在线考试系统。在线考试系统的主要实现功能包括：管理员：首页、个人中心、学生管理、教师管理、试卷管理、试题管理、论坛交流、系统管理、考试管理，教师；首页、个人中心、、试卷管理、试题管理、考试管理，学生；首页、个人中心、考试管理，前台首页；首页、试卷列表、系统公告、个人中心、后台管理功能，基本上实现了整个在线考试系统的过程。

开发环境

开发语言：Java
数据库 ：MySQL
系统架构：B/S
后端框架：SSM
前端框架：Vue
开发工具：IDEA或者Eclipse，JDK1.8，Maven

系统截图

部分代码

package com.controller;import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Date;
import java.util.List;
import javax.servlet.http.HttpServletRequest;import com.utils.ValidatorUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.baomidou.mybatisplus.mapper.Wrapper;
import com.annotation.IgnoreAuth;import com.entity.ChatEntity;
import com.entity.view.ChatView;import com.service.ChatService;
import com.service.TokenService;
import com.utils.PageUtils;
import com.utils.R;
import com.utils.MD5Util;
import com.utils.MPUtil;
import com.utils.CommonUtil;/*** 在线客服* 后端接口*/
@RestController
@RequestMapping("/chat")
public class ChatController {@Autowiredprivate ChatService chatService;/*** 后端列表*/@RequestMapping("/page")public R page(@RequestParam Map<String, Object> params,ChatEntity chat,HttpServletRequest request){if(!request.getSession().getAttribute("role").toString().equals("管理员")) {chat.setUserid((Long)request.getSession().getAttribute("userId"));}EntityWrapper<ChatEntity> ew = new EntityWrapper<ChatEntity>();PageUtils page = chatService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, chat), params), params));return R.ok().put("data", page);}/*** 前端列表*/@RequestMapping("/list")public R list(@RequestParam Map<String, Object> params,ChatEntity chat, HttpServletRequest request){if(!request.getSession().getAttribute("role").toString().equals("管理员")) {chat.setUserid((Long)request.getSession().getAttribute("userId"));}EntityWrapper<ChatEntity> ew = new EntityWrapper<ChatEntity>();PageUtils page = chatService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, chat), params), params));return R.ok().put("data", page);}/*** 列表*/@RequestMapping("/lists")public R list( ChatEntity chat){EntityWrapper<ChatEntity> ew = new EntityWrapper<ChatEntity>();ew.allEq(MPUtil.allEQMapPre( chat, "chat")); return R.ok().put("data", chatService.selectListView(ew));}/*** 查询*/@RequestMapping("/query")public R query(ChatEntity chat){EntityWrapper< ChatEntity> ew = new EntityWrapper< ChatEntity>();ew.allEq(MPUtil.allEQMapPre( chat, "chat")); ChatView chatView =  chatService.selectView(ew);return R.ok("查询在线客服成功").put("data", chatView);}/*** 后端详情*/@RequestMapping("/info/{id}")public R info(@PathVariable("id") Long id){ChatEntity chat = chatService.selectById(id);return R.ok().put("data", chat);}/*** 前端详情*/@RequestMapping("/detail/{id}")public R detail(@PathVariable("id") Long id){ChatEntity chat = chatService.selectById(id);return R.ok().put("data", chat);}/*** 后端保存*/@RequestMapping("/save")public R save(@RequestBody ChatEntity chat, HttpServletRequest request){chat.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());//ValidatorUtils.validateEntity(chat);if(StringUtils.isNotBlank(chat.getAsk())) {chatService.updateForSet("isreply=0", new EntityWrapper<ChatEntity>().eq("userid", request.getSession().getAttribute("userId")));chat.setUserid((Long)request.getSession().getAttribute("userId"));chat.setIsreply(1);}if(StringUtils.isNotBlank(chat.getReply())) {chatService.updateForSet("isreply=0", new EntityWrapper<ChatEntity>().eq("userid", chat.getUserid()));chat.setAdminid((Long)request.getSession().getAttribute("userId"));}chatService.insert(chat);return R.ok();}/*** 前端保存*/@RequestMapping("/add")public R add(@RequestBody ChatEntity chat, HttpServletRequest request){chat.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());//ValidatorUtils.validateEntity(chat);chat.setUserid((Long)request.getSession().getAttribute("userId"));if(StringUtils.isNotBlank(chat.getAsk())) {chatService.updateForSet("isreply=0", new EntityWrapper<ChatEntity>().eq("userid", request.getSession().getAttribute("userId")));chat.setUserid((Long)request.getSession().getAttribute("userId"));chat.setIsreply(1);}if(StringUtils.isNotBlank(chat.getReply())) {chatService.updateForSet("isreply=0", new EntityWrapper<ChatEntity>().eq("userid", chat.getUserid()));chat.setAdminid((Long)request.getSession().getAttribute("userId"));}chatService.insert(chat);return R.ok();}/*** 修改*/@RequestMapping("/update")public R update(@RequestBody ChatEntity chat, HttpServletRequest request){//ValidatorUtils.validateEntity(chat);chatService.updateById(chat);//全部更新return R.ok();}/*** 删除*/@RequestMapping("/delete")public R delete(@RequestBody Long[] ids){chatService.deleteBatchIds(Arrays.asList(ids));return R.ok();}/*** 提醒接口*/@RequestMapping("/remind/{columnName}/{type}")public R remindCount(@PathVariable("columnName") String columnName, HttpServletRequest request, @PathVariable("type") String type,@RequestParam Map<String, Object> map) {map.put("column", columnName);map.put("type", type);if(type.equals("2")) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");Calendar c = Calendar.getInstance();Date remindStartDate = null;Date remindEndDate = null;if(map.get("remindstart")!=null) {Integer remindStart = Integer.parseInt(map.get("remindstart").toString());c.setTime(new Date()); c.add(Calendar.DAY_OF_MONTH,remindStart);remindStartDate = c.getTime();map.put("remindstart", sdf.format(remindStartDate));}if(map.get("remindend")!=null) {Integer remindEnd = Integer.parseInt(map.get("remindend").toString());c.setTime(new Date());c.add(Calendar.DAY_OF_MONTH,remindEnd);remindEndDate = c.getTime();map.put("remindend", sdf.format(remindEndDate));}}Wrapper<ChatEntity> wrapper = new EntityWrapper<ChatEntity>();if(map.get("remindstart")!=null) {wrapper.ge(columnName, map.get("remindstart"));}if(map.get("remindend")!=null) {wrapper.le(columnName, map.get("remindend"));}int count = chatService.selectCount(wrapper);return R.ok().put("count", count);}}