「小程序JAVA实战」小程序的视频点赞功能开发（62）

转自：https://idig8.com/2018/09/24/xiaochengxujavashizhanxiaochengxudeshipindianzangongnengkaifa61/

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;

@Service

public 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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