「小程序JAVA实战」小程序的视频展示页面初始化（63）

转自：https://idig8.com/2018/09/24/xiaochengxujavashizhanxiaochengxudeshipinzhanshiyemianchushihua62/

进入列表详情，展示点赞状态用户的名称，头像名称。源码：https://github.com/limingios/wxProgram.git 中No.15和springboot

后台开发

拦截器，不拦截获取视频初始化信息。游客可以直接观看。通过用户id，视频id，视频创建id获取是否点赞视频，并获取创建者的信息。

• 拦截器

package com.idig8;



import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.idig8.controller.interceptor.MiniInterceptor;

@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

    @Value("${server.file.path}")
    private String fileSpace;

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //资源的路径.swagger2的资源.所在的目录，
        registry.addResourceHandler("/**")
        .addResourceLocations("classpath:/META-INF/resources/")
        .addResourceLocations("file:"+fileSpace);

    }



    @Bean
    public MiniInterceptor miniInterceptor() {
        return new MiniInterceptor();
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {

        registry.addInterceptor(miniInterceptor()).addPathPatterns("/user/**")
                       .addPathPatterns("/video/upload", "/video/uploadCover","/video/userLike","/video/userUnLike")
                                                  .addPathPatterns("/bgm/**")
                                                  .excludePathPatterns("/user/queryPublisher");

        super.addInterceptors(registry);
    }

}

UserController.java

package com.idig8.controller;

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
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.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import com.idig8.pojo.Users;
import com.idig8.pojo.vo.PublisherVideo;
import com.idig8.pojo.vo.UsersVO;
import com.idig8.service.UserService;
import com.idig8.utils.JSONResult;
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="用户接口",tags={"用户的controller"})
@RequestMapping(value = "/user")
public class UserController extends BasicController{

    @Autowired
    private UserService userService;

    @Value("${server.file.path}")
    private String fileSpace;

    @ApiOperation(value="用户上传头像",notes="用户上传头像的接口")
    @ApiImplicitParams({
        @ApiImplicitParam(name="userId",value="用户id",required=true,dataType="String",paramType="query"),
    })
    @PostMapping(value="/uploadFace",headers="content-type=multipart/form-data")
    public JSONResult uploadFace(String userId,@ApiParam(value="图片",required=true) MultipartFile file) {
        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 = "";
         try {
             path = FileUtil.uploadFile(file.getBytes(), fileSpace, fileName);
            } catch (Exception e) {
                e.getStackTrace();
                return JSONResult.errorMsg(e.getMessage());
            }

         Users user = new Users();
         user.setId(userId);
         user.setFaceImage(path);
         userService.updateUser(user);


        return JSONResult.ok(path);
    }

    @ApiOperation(value="通过用户Id获取用户信息",notes="通过用户Id获取用户信息的接口")
    @ApiImplicitParam(name="userId",value="用户id",required=true,dataType="String",paramType="query")
    @PostMapping("/queryByUserId")
    public JSONResult queryByUserId(String userId) {
        if (StringUtils.isBlank(userId)) {
            return JSONResult.errorMsg("用户id不能为空...");
        }

        Users user = userService.queryUserId(userId);
        UsersVO usersVO= new UsersVO();
        BeanUtils.copyProperties(user, usersVO);


        return JSONResult.ok(usersVO);
    }

    @PostMapping("/queryPublisher")
    public JSONResult queryPublisher(String loginUserId, String videoId, 
            String publishUserId) throws Exception {

        if (StringUtils.isBlank(publishUserId)) {
            return JSONResult.errorMsg("");
        }

        // 1. 查询视频发布者的信息
        Users userInfo = userService.queryUserInfo(publishUserId);
        UsersVO publisher = new UsersVO();
        BeanUtils.copyProperties(userInfo, publisher);

        // 2. 查询当前登录者和视频的点赞关系
        boolean userLikeVideo = userService.isUserLikeVideo(loginUserId, videoId);

        PublisherVideo bean = new PublisherVideo();
        bean.setPublisher(publisher);   
        bean.setUserLikeVideo(userLikeVideo);

        return JSONResult.ok(bean);
    }


}

• service 和 serviceImp

package com.idig8.service;

import com.idig8.pojo.Users;

public interface UserService {

    /**
     * 判断用户名是否存在
     * @param username
     * @return
     */
    public boolean queryUsernameIsExist(String username);

    /**
     * 保存用户
     * @param user
     * @return
     */
    public void saveUser(Users user);

    /**
     * 查询用户对象
     * @param username
     * @return
     */
    public Users queryUserIsExist(Users user);

    /**
     * 更新对象
     * @param username
     * @return
     */
    public void updateUser(Users user);


    /**
     * userId查询用户对象
     * @param username
     * @return
     */
    public Users queryUserId(String userId);

    /**
     * 查询用户信息
     */
    public Users queryUserInfo(String userId);

    /**
     * 查询用户是否喜欢点赞视频
     */
    public boolean isUserLikeVideo(String userId, String videoId);

}

package com.idig8.service.Impl;

import java.util.List;

import org.apache.commons.lang3.StringUtils;
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.idig8.mapper.UsersLikeVideosMapper;
import com.idig8.mapper.UsersMapper;
import com.idig8.pojo.Users;
import com.idig8.pojo.UsersLikeVideos;
import com.idig8.service.UserService;
import com.idig8.utils.MD5Utils;

import tk.mybatis.mapper.entity.Example;
import tk.mybatis.mapper.entity.Example.Criteria;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UsersMapper usersMapper;

    @Autowired
    private UsersLikeVideosMapper usersLikeVideosMapper;

    @Autowired
    private UsersMapper userMapper;

    @Autowired
    private Sid sid;

    @Transactional(propagation =Propagation.SUPPORTS)
    @Override
    public boolean queryUsernameIsExist(String username) {
        Users user = new Users();
        user.setUsername(username);
        Users result = usersMapper.selectOne(user);
        return result==null? false:true;
    }

    @Transactional(propagation =Propagation.REQUIRED)
    @Override
    public void saveUser(Users user) {
        String userId =sid.nextShort();
        user.setId(userId);
        usersMapper.insert(user);
    }

    @Transactional(propagation =Propagation.SUPPORTS)
    @Override
    public Users queryUserIsExist(Users user) {
        Example queryExample = new Example(Users.class);
        Criteria criteria = queryExample.createCriteria();
        criteria.andEqualTo("username",user.getUsername());
        try {
            criteria.andEqualTo("password",MD5Utils.getMD5Str(user.getPassword()));
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        Users userOne =  usersMapper.selectOneByExample(queryExample);
        return userOne;
    }

    @Transactional(propagation =Propagation.REQUIRED)
    @Override
    public void updateUser(Users user) {

        Example userExample = new Example(Users.class);
        Criteria criteria = userExample.createCriteria();
        criteria.andEqualTo("id", user.getId());
        usersMapper.updateByExampleSelective(user, userExample);
    }

    @Transactional(propagation =Propagation.SUPPORTS)
    @Override
    public Users queryUserId(String userId){
        Example queryExample = new Example(Users.class);
        Criteria criteria = queryExample.createCriteria();
        criteria.andEqualTo("id",userId);
        Users userOne =  usersMapper.selectOneByExample(queryExample);
        return userOne;
    }

    @Transactional(propagation = Propagation.SUPPORTS)
    @Override
    public Users queryUserInfo(String userId) {
        Example userExample = new Example(Users.class);
        Criteria criteria = userExample.createCriteria();
        criteria.andEqualTo("id", userId);
        Users user = userMapper.selectOneByExample(userExample);
        return user;
    }

    @Transactional(propagation = Propagation.SUPPORTS)
    @Override
    public boolean isUserLikeVideo(String userId, String videoId) {

        if (StringUtils.isBlank(userId) || StringUtils.isBlank(videoId)) {
            return false;
        }

        Example example = new Example(UsersLikeVideos.class);
        Criteria criteria = example.createCriteria();

        criteria.andEqualTo("userId", userId);
        criteria.andEqualTo("videoId", videoId);

        List<UsersLikeVideos> list = usersLikeVideosMapper.selectByExample(example);

        if (list != null && list.size() >0) {
            return true;
        }

        return false;
    }

}

小程序修改

• videoInfo.js

var videoUtils = require('../../utils/videoUtils.js')
const app = getApp()
Page({

  data: {
    cover:'cover',
    videoContext:"",
    videoInfo:{},
    videId:'',
    src:'',
    userLikeVideo:false,
    serverUrl:'',
    publisher:[]
  },


  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
    })

    var serverUrl = app.serverUrl;
    var user = app.getGlobalUserInfo();
    var loginUserId = "";
    if (user != null && user != undefined && user != '') {
      loginUserId = user.id;
    }
    wx.request({
      url: serverUrl + '/user/queryPublisher?loginUserId=' + loginUserId + "&videoId=" + videoInfo.id + "&publishUserId=" + videoInfo.userId,
      method: 'POST',
      success: function (res) {
        console.log(res.data);

        var publisher = res.data.data.publisher;
        var userLikeVideo = res.data.data.userLikeVideo;

        me.setData({
          serverUrl: serverUrl,
          publisher: publisher,
          userLikeVideo: userLikeVideo
        });
      }
    })




  },
  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：拦截器excludePathPatterns可以不拦截，分析业务，那些需要登录后才可以获得，那些不需要登录就可以看到。