Java实现在线问答 如何判断结果

🍊作者：计算机编程-吉哥

技术选型

springboot、mybatis、vue、elementui、layui、html、css、mysql、jdk1.8

数据库表结构

13张

开发工具

idea或者eclipse、navicat

⭐功能

【角色】管理员、学生、老师

【管理员功能】

 首页、个人中心、学生管理、教师管理、问题发布管理、疑难解答管理

【学生功能】

 首页、个人中心、问题发布管理、疑难解答管理、资料管理、作业管理、消息管理

【教师功能】

 首页、个人中心、疑难解答管理、课程管理、资料管理、试题管理、作业管理、消息管理

 🏆项目演示截图：

 1、管理员端-登录

2、管理员端-学生管理

3、管理员端-教师管理

4、管理员端-问题发布管理

5、管理员端-疑难解答

6、学生端-问题发布

7、学生端-疑难解答

8、学生端-资料管理

9、学生端-作业管理-课程列表

10、学生端-消息管理-在线聊天

11、学生端-消息管理-聊天回复

12、学生端-开始作业

13、教师端-疑难解答

14、教师端-课程管理

15、教师端-资料管理

16、教师端-试题管理

17、教师端-课程列表

18、教师端-消息管理-在线聊天

19、教师端-消息管理-聊天回复

 核心功能代码实现

1、问题发布Controller

package com.controller;


/**
 * 问题发布
 * 后端接口
 * @author 计算机编程-吉哥
 * @email 
 * @date 2022-10-01 17:15:52
 */
@RestController
@RequestMapping("/wentifabu")
public class WentifabuController {

    @Autowired
    private WentifabuService wentifabuService;
    

    /**
     * 后端列表
     */
    @RequestMapping("/page")
    public R page(@RequestParam Map<String, Object> params,WentifabuEntity wentifabu, HttpServletRequest request){
		String tableName = request.getSession().getAttribute("tableName").toString();
		if(tableName.equals("xuesheng")) {
			wentifabu.setXuehao((String)request.getSession().getAttribute("username"));
		}
        EntityWrapper<WentifabuEntity> ew = new EntityWrapper<WentifabuEntity>();
		PageUtils page = wentifabuService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, wentifabu), params), params));

        return R.ok().put("data", page);
    }
    
    /**
     * 前端列表
     */
    @RequestMapping("/list")
    public R list(@RequestParam Map<String, Object> params,WentifabuEntity wentifabu, HttpServletRequest request){
        EntityWrapper<WentifabuEntity> ew = new EntityWrapper<WentifabuEntity>();
		PageUtils page = wentifabuService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, wentifabu), params), params));
        return R.ok().put("data", page);
    }

	/**
     * 列表
     */
    @RequestMapping("/lists")
    public R list( WentifabuEntity wentifabu){
       	EntityWrapper<WentifabuEntity> ew = new EntityWrapper<WentifabuEntity>();
      	ew.allEq(MPUtil.allEQMapPre( wentifabu, "wentifabu")); 
        return R.ok().put("data", wentifabuService.selectListView(ew));
    }

	 /**
     * 查询
     */
    @RequestMapping("/query")
    public R query(WentifabuEntity wentifabu){
        EntityWrapper< WentifabuEntity> ew = new EntityWrapper< WentifabuEntity>();
 		ew.allEq(MPUtil.allEQMapPre( wentifabu, "wentifabu")); 
		WentifabuView wentifabuView =  wentifabuService.selectView(ew);
		return R.ok("查询问题发布成功").put("data", wentifabuView);
    }
	
    /**
     * 后端详情
     */
    @RequestMapping("/info/{id}")
    public R info(@PathVariable("id") String id){
        WentifabuEntity wentifabu = wentifabuService.selectById(id);
        return R.ok().put("data", wentifabu);
    }

    /**
     * 前端详情
     */
    @RequestMapping("/detail/{id}")
    public R detail(@PathVariable("id") String id){
        WentifabuEntity wentifabu = wentifabuService.selectById(id);
        return R.ok().put("data", wentifabu);
    }
    

    /**
     * 后端保存
     */
    @RequestMapping("/save")
    public R save(@RequestBody WentifabuEntity wentifabu, HttpServletRequest request){
    	wentifabu.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());
    	//ValidatorUtils.validateEntity(wentifabu);
        wentifabuService.insert(wentifabu);
        return R.ok();
    }
    
    /**
     * 前端保存
     */
    @RequestMapping("/add")
    public R add(@RequestBody WentifabuEntity wentifabu, HttpServletRequest request){
    	wentifabu.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());
    	//ValidatorUtils.validateEntity(wentifabu);
        wentifabuService.insert(wentifabu);
        return R.ok();
    }

    /**
     * 修改
     */
    @RequestMapping("/update")
    public R update(@RequestBody WentifabuEntity wentifabu, HttpServletRequest request){
        //ValidatorUtils.validateEntity(wentifabu);
        wentifabuService.updateById(wentifabu);//全部更新
        return R.ok();
    }
    

    /**
     * 删除
     */
    @RequestMapping("/delete")
    public R delete(@RequestBody Long[] ids){
        wentifabuService.deleteBatchIds(Arrays.asList(ids));
        return R.ok();
    }
    
    
}

2、问题发布Service

package com.service.impl;

/**
 * 计算机编程-吉哥
 **/

@Service("wentifabuService")
public class WentifabuServiceImpl extends ServiceImpl<WentifabuDao, WentifabuEntity> implements WentifabuService {
	
	
    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        Page<WentifabuEntity> page = this.selectPage(
                new Query<WentifabuEntity>(params).getPage(),
                new EntityWrapper<WentifabuEntity>()
        );
        return new PageUtils(page);
    }
    
    @Override
	public PageUtils queryPage(Map<String, Object> params, Wrapper<WentifabuEntity> wrapper) {
		  Page<WentifabuView> page =new Query<WentifabuView>(params).getPage();
	        page.setRecords(baseMapper.selectListView(page,wrapper));
	    	PageUtils pageUtil = new PageUtils(page);
	    	return pageUtil;
 	}
    
    @Override
	public List<WentifabuVO> selectListVO(Wrapper<WentifabuEntity> wrapper) {
 		return baseMapper.selectListVO(wrapper);
	}
	
	@Override
	public WentifabuVO selectVO(Wrapper<WentifabuEntity> wrapper) {
 		return baseMapper.selectVO(wrapper);
	}
	
	@Override
	public List<WentifabuView> selectListView(Wrapper<WentifabuEntity> wrapper) {
		return baseMapper.selectListView(wrapper);
	}

	@Override
	public WentifabuView selectView(Wrapper<WentifabuEntity> wrapper) {
		return baseMapper.selectView(wrapper);
	}

}

3、问题发布Dao(数据访问对象)

package com.dao;

/**
 * 问题发布
 * 
 * @author 计算机编程-吉哥
 * @email 
 * @date 2022-10-01 17:15:52
 */
public interface WentifabuDao extends BaseMapper<WentifabuEntity> {
	
	List<WentifabuVO> selectListVO(@Param("ew") Wrapper<WentifabuEntity> wrapper);
	
	WentifabuVO selectVO(@Param("ew") Wrapper<WentifabuEntity> wrapper);
	
	List<WentifabuView> selectListView(@Param("ew") Wrapper<WentifabuEntity> wrapper);

	List<WentifabuView> selectListView(Pagination page,@Param("ew") Wrapper<WentifabuEntity> wrapper);
	
	WentifabuView selectView(@Param("ew") Wrapper<WentifabuEntity> wrapper);
	
}

4、问题发布Dao.xml(mybatis映射文件)

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.dao.WentifabuDao">

	<!-- 可根据自己的需求，是否要使用 -->
    <resultMap type="com.entity.WentifabuEntity" id="wentifabuMap">
        <result property="biaoti" column="biaoti"/>
        <result property="timu" column="timu"/>
        <result property="daan" column="daan"/>
        <result property="faburiqi" column="faburiqi"/>
        <result property="xuehao" column="xuehao"/>
        <result property="xingming" column="xingming"/>
        <result property="sfsh" column="sfsh"/>
        <result property="shhf" column="shhf"/>
    </resultMap>

	<select id="selectListVO"
		resultType="com.entity.vo.WentifabuVO" >
		SELECT * FROM wentifabu  wentifabu         
        <where> 1=1 ${ew.sqlSegment}</where>
	</select>
	
	<select id="selectVO"
		resultType="com.entity.vo.WentifabuVO" >
		SELECT  wentifabu.* FROM wentifabu  wentifabu 	
 		<where> 1=1 ${ew.sqlSegment}</where>
	</select>

    <select id="selectListView"
		resultType="com.entity.view.WentifabuView" >

		SELECT  wentifabu.* FROM wentifabu  wentifabu 	        
        <where> 1=1 ${ew.sqlSegment}</where>
	</select>
	
	<select id="selectView"
		resultType="com.entity.view.WentifabuView" >
		SELECT * FROM wentifabu  wentifabu <where> 1=1 ${ew.sqlSegment}</where>
	</select>
	
</mapper>