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「小程序JAVA实战」小程序的视频点赞功能开发(62)

视频点赞关系有3张表,用户表(获得点赞数量),视频表(获得点赞数量),用户喜欢视频的关联表,需要同时操作三张表。源码:https://github.com/limingios/wxProgram.git 中No.15和springboot

后台开发

  • mapper.xml开发

VideosUserMapper.xml

<?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.idig8.mapper.VideosUsersMapper" >
  <resultMap id="BaseResultMap" type="com.idig8.pojo.vo.VideosVO" >
    <!--
      WARNING - @mbg.generated
    -->
    <id column="id" property="id" jdbcType="VARCHAR" />
    <result column="user_id" property="userId" jdbcType="VARCHAR" />
    <result column="audio_id" property="audioId" jdbcType="VARCHAR" />
    <result column="video_desc" property="videoDesc" jdbcType="VARCHAR" />
    <result column="video_path" property="videoPath" jdbcType="VARCHAR" />
    <result column="video_seconds" property="videoSeconds" jdbcType="REAL" />
    <result column="video_width" property="videoWidth" jdbcType="INTEGER" />
    <result column="video_height" property="videoHeight" jdbcType="INTEGER" />
    <result column="cover_path" property="coverPath" jdbcType="VARCHAR" />
    <result column="like_counts" property="likeCounts" jdbcType="BIGINT" />
    <result column="status" property="status" jdbcType="INTEGER" />
    <result column="create_time" property="createTime" jdbcType="TIMESTAMP" />
    <result column="username" property="username" jdbcType="VARCHAR" />
    <result column="face_image" property="faceImage" jdbcType="VARCHAR" />
    <result column="nickname" property="nickname" jdbcType="VARCHAR" />
  </resultMap>
  
  <select id="queryAllVideos" resultMap="BaseResultMap" parameterType="String">
    select v.*,u.face_image,u.username,u.nickname from videos v
    left join users u on v.user_id = u.id
    where 
        1 = 1        <if test="videoDesc !=null  and videoDesc != '' ">
            and v.video_desc like '%${videoDesc}%'        </if>
        and v.status = 1
    order by v.create_time    
  </select>
  
  
  <update id="addVideoLikeCount" parameterType="String">
    update videos set like_counts=like_counts+1 where id=#{videoId}  </update>
  
   <update id="reduceVideoLikeCount" parameterType="String">
    update videos set like_counts=like_counts-1 where id=#{videoId}  </update></mapper>

UsersMapper.xml

<?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.idig8.mapper.UsersMapper" >
  <resultMap id="BaseResultMap" type="com.idig8.pojo.Users" >
    <!--
      WARNING - @mbg.generated
    -->
    <id column="id" property="id" jdbcType="VARCHAR" />
    <result column="username" property="username" jdbcType="VARCHAR" />
    <result column="password" property="password" jdbcType="VARCHAR" />
    <result column="face_image" property="faceImage" jdbcType="VARCHAR" />
    <result column="nickname" property="nickname" jdbcType="VARCHAR" />
    <result column="fans_counts" property="fansCounts" jdbcType="INTEGER" />
    <result column="follow_counts" property="followCounts" jdbcType="INTEGER" />
    <result column="receive_like_counts" property="receiveLikeCounts" jdbcType="INTEGER" />
  </resultMap>
  
  <update id="addReceiveLikeCount" parameterType="String">
    update users set receive_like_counts = receive_like_counts+1 where id=#{userId}  </update>
  
    <update id="reduceReceiveLikeCount" parameterType="String">
    update users set receive_like_counts = receive_like_counts-1 where id=#{userId}  </update>
  </mapper>
  • service 和 serviceImpl

VideoService.java

package com.idig8.service;import java.util.List;import com.idig8.pojo.Videos;import com.idig8.utils.PagedResult;public interface VideoService {    
    /**
     * 保存视频信息
     * @param Id
     * @return
     */
    public String saveVideo(Videos video);    
    /**
     * 分析查询视频列表
     * @param video
     * @param isSaveRecord
     * @param page
     * @param pageSize
     * @return
     */
    public PagedResult getAllVideos(Videos video,Integer isSaveRecord,Integer page,Integer pageSize);    
    /**
     * 获取热搜词列表
     * @return
     */
    public List<String> gethostList();    
    public void userLikeVideo(String userId,String videoId,String videoCreaterId);    
    public void userUnLikeVideo(String userId,String videoId,String videoCreaterId);
    
}

VideoServiceImpl.java

package com.idig8.service.Impl;import java.util.List;import org.n3r.idworker.Sid;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Propagation;import org.springframework.transaction.annotation.Transactional;import com.github.pagehelper.PageHelper;import com.github.pagehelper.PageInfo;import com.idig8.mapper.SearchRecordsMapper;import com.idig8.mapper.UsersLikeVideosMapper;import com.idig8.mapper.UsersMapper;import com.idig8.mapper.VideosMapper;import com.idig8.mapper.VideosUsersMapper;import com.idig8.pojo.SearchRecords;import com.idig8.pojo.UsersLikeVideos;import com.idig8.pojo.Videos;import com.idig8.pojo.vo.VideosVO;import com.idig8.service.VideoService;import com.idig8.utils.PagedResult;import tk.mybatis.mapper.entity.Example;import tk.mybatis.mapper.entity.Example.Criteria;@Servicepublic class VideoServiceImpl implements VideoService {    @Autowired
    private VideosMapper videosMapper;    @Autowired
    private UsersMapper usersMapper;    @Autowired
    private VideosUsersMapper videosUsersMapper;    @Autowired
    private SearchRecordsMapper searchRecordsMapper;    @Autowired
    private UsersLikeVideosMapper usersLikeVideosMapper;    @Autowired
    private Sid sid;    @Transactional(propagation = Propagation.REQUIRED)    public String saveVideo(Videos video) {
        String id = sid.nextShort();
        video.setId(id);

        videosMapper.insertSelective(video);        return id;

    }    @Override
    @Transactional(propagation = Propagation.REQUIRED)    public PagedResult getAllVideos(Videos video, Integer isSaveRecord, Integer page, Integer pageSize) {

        String desc = video.getVideoDesc();        if (isSaveRecord != null && isSaveRecord == 1) {
            SearchRecords record = new SearchRecords();
            String recordId = sid.nextShort();
            record.setId(recordId);
            record.setContent(desc);
            searchRecordsMapper.insert(record);
        }

        PageHelper.startPage(page, pageSize);
        List<VideosVO> list = videosUsersMapper.queryAllVideos(desc);
        PageInfo<VideosVO> pageList = new PageInfo<>(list);

        PagedResult result = new PagedResult();
        result.setPage(page);
        result.setTotal(pageList.getPages());
        result.setRows(list);
        result.setRecords(pageList.getTotal());        return result;
    }    @Transactional(propagation = Propagation.SUPPORTS)    @Override
    public List<String> gethostList() {        return searchRecordsMapper.gethotList();
    }    @Override
    public void userLikeVideo(String userId, String videoId, String videoCreaterId) {        // 1.保存用戶和视频的关联关系
        String likeId = sid.nextShort();
        UsersLikeVideos usersLikeVideos = new UsersLikeVideos();
        usersLikeVideos.setId(likeId);
        usersLikeVideos.setUserId(userId);
        usersLikeVideos.setVideoId(videoId);
        usersLikeVideosMapper.insert(usersLikeVideos);        // 2.视频喜欢的累加
        videosUsersMapper.addVideoLikeCount(videoId);        // 3. 用户喜欢的累加
        usersMapper.addReceiveLikeCount(userId);

    }    @Override
    public void userUnLikeVideo(String userId, String videoId, String videoCreaterId) {
        Example example = new Example(UsersLikeVideos.class);
        Criteria criteria = example.createCriteria();
        criteria.andEqualTo("userId", userId);
        criteria.andEqualTo("videoId", videoId);
        usersLikeVideosMapper.deleteByExample(example);        // 2.视频喜欢的累减
        videosUsersMapper.reduceVideoLikeCount(videoId);        // 3. 用户喜欢的累减
        usersMapper.reduceReceiveLikeCount(userId);
    }
}
  • mapper.java文件

UsersMapper.java

package com.idig8.mapper;import com.idig8.pojo.Users;import com.idig8.utils.MyMapper;public interface UsersMapper extends MyMapper<Users> {    public void addReceiveLikeCount(String userId);    
    public void reduceReceiveLikeCount(String userId);

}

VideosUsersMapper.java

package com.idig8.mapper;import java.util.List;import org.apache.ibatis.annotations.Param;import com.idig8.pojo.Videos;import com.idig8.pojo.vo.VideosVO;import com.idig8.utils.MyMapper;public interface VideosUsersMapper extends MyMapper<VideosVO> {    
    public List<VideosVO> queryAllVideos(@Param("videoDesc") String videoDesc);    
    public void addVideoLikeCount(String videoId);    
    public void reduceVideoLikeCount(String videoId);
    
}
  • controller.java

VideoController.java

package com.idig8.controller;import java.io.File;import java.util.Date;import java.util.UUID;import org.apache.commons.lang3.StringUtils;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Value;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.multipart.MultipartFile;import com.idig8.pojo.Bgm;import com.idig8.pojo.Videos;import com.idig8.service.BgmService;import com.idig8.service.VideoService;import com.idig8.utils.FetchVideoCover;import com.idig8.utils.JSONResult;import com.idig8.utils.MergeVideoMp3;import com.idig8.utils.PagedResult;import com.idig8.utils.enums.VideoStatusEnum;import com.idig8.utils.file.FileUtil;import io.swagger.annotations.Api;import io.swagger.annotations.ApiImplicitParam;import io.swagger.annotations.ApiImplicitParams;import io.swagger.annotations.ApiOperation;import io.swagger.annotations.ApiParam;@RestController@Api(value="视频相关业务的接口", tags= {"视频相关业务的controller"})@RequestMapping("/video")public class VideoController extends BasicController {    
    @Autowired
    private BgmService bgmService;    
    @Autowired
    private VideoService videosService;    
    @Value("${server.file.path}")    private String fileSpace;    
    @Value("${server.ffmpeg.path}")    private String ffmpegexe;    
    
    @ApiOperation(value="上传视频", notes="上传视频的接口")    @ApiImplicitParams({        @ApiImplicitParam(name="userId", value="用户id", required=true, 
                dataType="String", paramType="form"),        @ApiImplicitParam(name="bgmId", value="背景音乐id", required=false, 
                dataType="String", paramType="form"),        @ApiImplicitParam(name="videoSeconds", value="背景音乐播放长度", required=true, 
                dataType="String", paramType="form"),        @ApiImplicitParam(name="videoWidth", value="视频宽度", required=true, 
                dataType="String", paramType="form"),        @ApiImplicitParam(name="videoHeight", value="视频高度", required=true, 
                dataType="String", paramType="form"),        @ApiImplicitParam(name="desc", value="视频描述", required=false, 
                dataType="String", paramType="form")
    })    @PostMapping(value="/upload", headers="content-type=multipart/form-data")    public JSONResult upload(String userId, 
                String bgmId, double videoSeconds, 
                int videoWidth, int videoHeight,
                String desc,
                @ApiParam(value="短视频", required=true)
                MultipartFile file) throws Exception {        
        if (StringUtils.isBlank(userId)) {            return JSONResult.errorMsg("用户id不能为空...");
        }        // 文件保存的命名空间
        String fileName = file.getOriginalFilename();        // 保存到数据库中的相对路径
        String path = "";
        String videOutPath = "";
        String ImagePath = "";        try {
             path = FileUtil.uploadFile(file.getBytes(), fileSpace, fileName);
            } catch (Exception e) {
                e.getStackTrace();                   return JSONResult.errorMsg(e.getMessage());
            }                
         
    
        if(StringUtils.isNotBlank(bgmId)){
            Bgm bgm = bgmService.queryBgmById(bgmId);
            String mp3BgmPath = fileSpace + bgm.getPath();
            MergeVideoMp3 mergeVideoMp3 = new MergeVideoMp3(ffmpegexe);
            String videOutPathName = UUID.randomUUID().toString()+".mp4";
            File targetFile = new File(fileSpace + userId);            if (!targetFile.exists()) {
                targetFile.mkdirs();
            }
            videOutPath = "/"+userId+"/"+videOutPathName;
            String videoInput = fileSpace +path;
            mergeVideoMp3.convertor(videoInput, mp3BgmPath, videoSeconds, fileSpace +videOutPath);
            
        }else{
            videOutPath = path;
            
        }
        
        ImagePath =  "/"+userId+"/"+UUID.randomUUID().toString()+".jpg";;
        FetchVideoCover fetchVideoCover = new FetchVideoCover(ffmpegexe);
        fetchVideoCover.getCover(fileSpace +videOutPath, fileSpace +ImagePath);
        
        
        Videos videos = new Videos();
        videos.setAudioId(bgmId);
        videos.setCreateTime(new Date());
        videos.setVideoDesc(desc);
        videos.setId(UUID.randomUUID().toString());
        videos.setUserId(userId);
        videos.setVideoHeight(videoHeight);
        videos.setVideoWidth(videoWidth);
        videos.setVideoPath(videOutPath);
        videos.setCoverPath(ImagePath);
        videos.setStatus(VideoStatusEnum.SUCCESS.value);
        videosService.saveVideo(videos);                 
        return JSONResult.ok(path);
        
    }    
    @PostMapping(value="/showAll")    @ApiOperation(value="视频列表", notes="分页的视频列表")    public JSONResult upload(@RequestBody Videos video,Integer isSaveRecord,
            Integer page) throws Exception {        if(page == null){
            page = 1;
        }
        PagedResult result = videosService.getAllVideos(video,isSaveRecord,page, PAGE_SIZE);     
        return JSONResult.ok(result);
        
    }    
    @PostMapping(value="/userLike")    @ApiOperation(value="热搜词列表", notes="热搜词列表")    public JSONResult userLike(String userId,String videoId,String videoCreaterId) throws Exception {
        
        videosService.userLikeVideo(userId, videoId, videoCreaterId);        return JSONResult.ok();
        
    }    
    @PostMapping(value="/userUnLike")    public JSONResult userUnLike(String userId,String videoId,String videoCreaterId) throws Exception {
        videosService.userUnLikeVideo(userId, videoId, videoCreaterId);        return JSONResult.ok();
        
    }    
    @PostMapping(value="/hot")    public JSONResult upload() throws Exception { 
        return JSONResult.ok(videosService.gethostList());
        
    }
}

小程序前端修改

var videoUtils = require('../../utils/videoUtils.js')const app = getApp()
Page({  data: {    cover:'cover',    videoContext:"",    videoInfo:{},    videId:'',    src:'',    userLikeVideo:false
  },  

  showSearch:function(){
    wx.navigateTo({      url: '../videoSearch/videoSearch',
    })
  },  onLoad:function(params){    var me = this;
    me.videoContext = wx.createVideoContext('myVideo', me);    var videoInfo = JSON.parse(params.videoInfo);    var videoWidth = videoInfo.videoWidth;    var videoHeight = videoInfo.videoHeight;    var cover = 'cover';    if (videoWidth > videoHeight){
      cover = '';
    }
    me.setData({      videId: videoInfo.id,      src: app.serverUrl + videoInfo.videoPath,      videoInfo: videoInfo,      cover: cover
    })


  },  showIndex:function(){
    wx.redirectTo({      url: '../index/index',
    })
  },  onShow:function(){    var me = this;
    me.videoContext.play();
  },  onHide:function(){    var me = this;
    me.videoContext.pause();
  },  upload:function(){ 
    var me = this;    var userInfo = app.getGlobalUserInfo();    var videoInfo = JSON.stringify(me.data.videoInfo);    var realUrl = '../videoInfo/videoInfo#videoInfo@' + videoInfo;    if (userInfo.id == '' || userInfo.id == undefined) {
      wx.navigateTo({        url: '../userLogin/userLogin?realUrl=' + realUrl,
      })
    } else {
      videoUtils.uploadVideo();
    }


  },  showMine: function () {    var me = this;    var userInfo = app.getGlobalUserInfo();    var videoInfo = JSON.parse    if (userInfo.id == '' || userInfo.id == undefined){
      wx.navigateTo({        url: '../userLogin/userLogin',
      })
    }else{
      wx.navigateTo({        url: '../mine/mine',
      })
    }
    
   
  },  likeVideoOrNot: function () {    var me = this;    var userInfo = app.getGlobalUserInfo();    var videoInfoStr = JSON.stringify(me.data.videoInfo);    var realUrl = '../videoInfo/videoInfo#videoInfo@' + videoInfoStr;    if (userInfo.id == '' || userInfo.id == undefined) {
      wx.navigateTo({        url: '../userLogin/userLogin?realUrl=' + realUrl,
      })
    } else {      var videoInfo = me.data.videoInfo;      var userLikeVideo = me.data.userLikeVideo;      var url = "/video/userLike?userId=" + userInfo.id + "&videoId=" + videoInfo.id + "&videoCreaterId=" + userLikeVideo.userId;      if (userLikeVideo){        var url = "/video/userUnLike?userId=" + userInfo.id + "&videoId=" + videoInfo.id + "&videoCreaterId=" + userLikeVideo.userId;
      }
      wx.showLoading({        title: '....',
      })
      wx.request({        url: app.serverUrl + url,        method: "POST",        header: {          'content-type': 'application/json', // 默认值
          'headerUserId': userInfo.id,          'headerUserToken': userInfo.userToken
        },        success: function (res) {
          wx.hideLoading();
          me.setData({            userLikeVideo: !userLikeVideo,
          })
        }
      })

    }


  }
})


PS:许多的功能如果分解,逻辑清晰的话,剩下的都是搬砖活。


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