「小程序JAVA实战」小程序的关注功能（65）
后端开发在个人页面，根据发布者个人和个人的信息来进行展示，如果是发布者，可以进行关注和取消关注。源码：https://github.com/limingios/wxProgram.git 中No.15和springboot
涉及2涨表，一个关联表，个人和粉丝的关联表，用户表。
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); /** * @Description: 增加粉丝数 */ public void addFansCount(String userId); /** * @Description: 增加关注数 */ public void addFollersCount(String userId); /** * @Description: 减少粉丝数 */ public void reduceFansCount(String userId); /** * @Description: 减少关注数 */ public void reduceFollersCount(String userId);}
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> <update id="addFansCount" parameterType="String"> update users set fans_counts=fans_counts+1 where id=#{userId} </update> <update id="reduceFansCount" parameterType="String"> update users set fans_counts=fans_counts-1 where id=#{userId} </update> <update id="addFollersCount" parameterType="String"> update users set follow_counts=follow_counts+1 where id=#{userId} </update> <update id="reduceFollersCount" parameterType="String"> update users set follow_counts=follow_counts-1 where id=#{userId} </update> </mapper>
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, String fanId) { 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); usersVO.setFollow(userService.queryIfFollow(userId, fanId)); 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); } @PostMapping("/beyourfans") public JSONResult beyourfans(String userId, String fanId) throws Exception { if (StringUtils.isBlank(userId) || StringUtils.isBlank(fanId)) { return JSONResult.errorMsg(""); } userService.saveUserFanRelation(userId, fanId); return JSONResult.ok("关注成功..."); } @PostMapping("/dontbeyourfans") public JSONResult dontbeyourfans(String userId, String fanId) throws Exception { if (StringUtils.isBlank(userId) || StringUtils.isBlank(fanId)) { return JSONResult.errorMsg(""); } userService.deleteUserFanRelation(userId, fanId); return JSONResult.ok("取消关注成功..."); } }
UserService.java
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); /** * @Description: 增加用户和粉丝的关系 */ public void saveUserFanRelation(String userId, String fanId); /** * @Description: 删除用户和粉丝的关系 */ public void deleteUserFanRelation(String userId, String fanId); /** * @Description: 查询用户是否关注 */ public boolean queryIfFollow(String userId, String fanId); }
UserServiceImpl.java
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.UsersFansMapper;import com.idig8.mapper.UsersLikeVideosMapper;import com.idig8.mapper.UsersMapper;import com.idig8.pojo.Users;import com.idig8.pojo.UsersFans;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;@Servicepublic class UserServiceImpl implements UserService { @Autowired private UsersMapper usersMapper; @Autowired private UsersLikeVideosMapper usersLikeVideosMapper; @Autowired private UsersMapper userMapper; @Autowired private Sid sid; @Autowired private UsersFansMapper usersFansMapper; @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; } @Transactional(propagation = Propagation.REQUIRED) @Override public void saveUserFanRelation(String userId, String fanId) { String relId = sid.nextShort(); UsersFans userFan = new UsersFans(); userFan.setId(relId); userFan.setUserId(userId); userFan.setFanId(fanId); usersFansMapper.insert(userFan); userMapper.addFansCount(userId); userMapper.addFollersCount(fanId); } @Transactional(propagation = Propagation.REQUIRED) @Override public void deleteUserFanRelation(String userId, String fanId) { Example example = new Example(UsersFans.class); Criteria criteria = example.createCriteria(); criteria.andEqualTo("userId", userId); criteria.andEqualTo("fanId", fanId); usersFansMapper.deleteByExample(example); userMapper.reduceFansCount(userId); userMapper.reduceFollersCount(fanId); } @Override public boolean queryIfFollow(String userId, String fanId) { Example example = new Example(UsersFans.class); Criteria criteria = example.createCriteria(); criteria.andEqualTo("userId", userId); criteria.andEqualTo("fanId", fanId); List<UsersFans> list = usersFansMapper.selectByExample(example); if (list != null && !list.isEmpty() && list.size() > 0) { return true; } return false; }}前端小程序
<view> <view class='container'> <image src="{{faceImage}}" class="face" bindtap='uploadFace'></image> <label class='nickname'>{{nickname}}</label> <block wx:if='{{isMe}}'> <button size='mini' class='primary' bindtap='uploadVideo'> 上传作品</button> <button size='mini' type='' class='logout' bindtap='logout'>注销</button> </block> <block wx:if='{{!isMe}}'> <block wx:if='{{isFollow}}'> <button size='mini' type='' class='follow' data-followType='0' bindtap='followMe'>已关注</button> </block> <block wx:if='{{!isFollow}}'> <button size='mini' type='primary' class='follow' data-followType='1' bindtap='followMe'>关注我</button> </block> </block> <view class='container-row'> <label class='info-items'>{{fansCounts}} 粉丝</label> <label class='info-items'>{{followCounts}} 关注</label> <label class='info-items'>{{receiveLikeCounts}} 获赞</label> </view> </view></view><view class="line"></view>
// pages/mine/mine.jsconst app = getApp()var videoUtils = require('../../utils/videoUtils.js')Page({ /** * 页面的初始数据 */ data: { faceImage: "../../resource/images/noneface.png", nickname: "昵称", fansCounts: 0, followCounts: 0, receiveLikeCounts: 0, isMe:true, isFollow:false, publisherId: '' }, /** * 用户注销 */ logout: function(e) { var user = app.getGlobalUserInfo(); wx.showLoading({ title: '正在注销中。。。' }); wx.request({ url: app.serverUrl + "/logout?userId=" + user.id, method: "POST", header: { 'content-type': 'application/json' // 默认值 }, success: function(res) { console.log(res.data); var status = res.data.status; wx.hideLoading(); if (status == 200) { wx.showToast({ title: "用户注销成功~！", icon: 'none', duration: 3000 }) // app.userInfo = null; wx.removeStorageSync("userInfo"); wx.redirectTo({ url: '../userRegister/userRegister', }) } else if (status == 500) { wx.showToast({ title: res.data.msg, icon: 'none', duration: 3000 }) } } }) }, followMe: function (e) { var me = this; var user = app.getGlobalUserInfo(); var userId = user.id; var publisherId = me.data.publisherId; var followType = e.currentTarget.dataset.followtype; // 1：关注 0：取消关注 var url = ''; if (followType == '1') { url = '/user/beyourfans?userId=' + publisherId + '&fanId=' + userId; } else { url = '/user/dontbeyourfans?userId=' + publisherId + '&fanId=' + userId; } wx.showLoading(); wx.request({ url: app.serverUrl + url, method: 'POST', header: { 'content-type': 'application/json', // 默认值 'headerUserId': user.id, 'headerUserToken': user.userToken }, success: function () { wx.hideLoading(); if (followType == '1') { me.setData({ isFollow: true, fansCounts: ++me.data.fansCounts }) } else { me.setData({ isFollow: false, fansCounts: --me.data.fansCounts }) } } }) }, /** * 头像上传 */ uploadFace: function(e) { // var user = app.userInfo; var user = app.getGlobalUserInfo(); var me = this; wx.chooseImage({ count: 1, // 默认9 sizeType: ['compressed'], // 可以指定是原图还是压缩图，默认二者都有 sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有 success: function(res) { // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片 var tempFilePaths = res.tempFilePaths if (tempFilePaths.length > 0) { console.log(tempFilePaths[0]); wx.uploadFile({ url: app.serverUrl + "/user/uploadFace?userId=" + user.id, //仅为示例，非真实的接口地址 filePath: tempFilePaths[0], name: 'file', success: function(res) { var data = JSON.parse(res.data); console.log(data); wx.hideLoading(); if (data.status == 200) { wx.showToast({ title: "用户上传成功~！", icon: 'none', duration: 3000 }) me.setData({ faceUrl: app.serverUrl + data.data }) } else if (data.status == 500) { wx.showToast({ title: data.msg, icon: 'none', duration: 3000 }) } } }) } } }) }, /** * 生命周期函数--监听页面加载 */ onLoad: function(params) { var me = this; var userInfo = app.getGlobalUserInfo(); var publisherId = params.publisherId; var userId = userInfo.id; if (publisherId != null && publisherId != '' && publisherId!=undefined){ userId = publisherId; me.setData({ isMe:false, publisherId: publisherId, }) } wx.showLoading({ title: '正在获取用户信息。。。' }); wx.request({ url: app.serverUrl + "/user/queryByUserId?userId=" + userId + "&fanId" + userInfo.id, method: "POST", header: { 'content-type': 'application/json', // 默认值 'headerUserId': userInfo.id, 'headerUserToken': userInfo.userToken }, success: function(res) { console.log(res.data); var status = res.data.status; if (status == 200) { var userInfo = res.data.data; wx.hideLoading(); var faceImage = me.data.faceUrl; if (userInfo.faceImage != null && userInfo.faceImage != '' && userInfo.faceImage != undefined) { faceImage = app.serverUrl + userInfo.faceImage; } me.setData({ faceImage: faceImage, fansCounts: userInfo.fansCounts, followCounts: userInfo.followCounts, receiveLikeCounts: userInfo.receiveLikeCounts, nickname: userInfo.nickname, isFollow: userInfo.follow }) } else if (status == 502){ wx.showToast({ title: res.data.msg, duration:3000, icon:'none', complete:function(){ wx.removeStorageSync("userInfo"); wx.navigateTo({ url: '../userLogin/userLogin', }) } }) } } }) }, uploadVideo: function(e) { videoUtils.uploadVideo(); }, /** * 生命周期函数--监听页面初次渲染完成 */ onReady: function() { }, /** * 生命周期函数--监听页面显示 */ onShow: function() { }, /** * 生命周期函数--监听页面隐藏 */ onHide: function() { }, /** * 生命周期函数--监听页面卸载 */ onUnload: function() { }, /** * 页面相关事件处理函数--监听用户下拉动作 */ onPullDownRefresh: function() { }, /** * 页面上拉触底事件的处理函数 */ onReachBottom: function() { }, /** * 用户点击右上角分享 */ onShareAppMessage: function() { }})
PS：关注跟点赞类似也是操作后端的几张表来完成的，重点是前端需要判断状态，来进行显示对应的按钮，其实小程序把逻辑都给了前端。data里面的操作灵活的运用，业务逻辑的梳理。
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