原文链接地址：「小程序JAVA实战」小程序的关注功能（65）
上一篇: 「小程序JAVA实战」小程序查看视频发布者信息（64）下一篇: 「小程序JAVA实战」小程序的个人信息作品，收藏，关注（66）
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
后端开发
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 {
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
update users set receive_like_counts = receive_like_counts+1 where id=#{userId}
update users set receive_like_counts = receive_like_counts-1 where id=#{userId}
update users set fans_counts=fans_counts+1 where id=#{userId}
update users set fans_counts=fans_counts-1 where id=#{userId}
update users set follow_counts=follow_counts+1 where id=#{userId}
update users set follow_counts=follow_counts-1 where id=#{userId}
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;
@Service
public 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 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 list = usersFansMapper.selectByExample(example);
if (list != null && !list.isEmpty() && list.size() > 0) {
return true;
}
return false;
}
}
前端小程序
// pages/mine/mine.js
const 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。
