小程序实现后台数据交互及WXS的使用

一，数据交互准备工作

1.1 后端准备

后端部分代码，可自行创建后端代码

package com.zking.minoa.wxcontroller;import com.zking.minoa.mapper.InfoMapper;
import com.zking.minoa.model.Info;
import com.zking.minoa.util.ResponseUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.HashMap;
import java.util.List;
import java.util.Map;/*** @Autho donkee* @Since 2022/6/29*/
@RestController
@RequestMapping("/wx/home")
public class WxHomeController {@Autowiredprivate InfoMapper infoMapper;@RequestMapping("/index")public Object index(Info info) {List<Info> infoList = infoMapper.list(info);Map<Object, Object> data = new HashMap<Object, Object>();data.put("infoList",infoList);return ResponseUtil.ok(data);}
}

pom.xml的配置:

根据自己有更多需求进行应用配置的增加

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.6.2</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.zking</groupId><artifactId>minoa</artifactId><version>0.0.1-SNAPSHOT</version><name>minoa</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version><fastjson.version>1.2.70</fastjson.version><jackson.version>2.9.8</jackson.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.2.1</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.44</version><scope>runtime</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>${fastjson.version}</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes></configuration></plugin><plugin><groupId>org.mybatis.generator</groupId><artifactId>mybatis-generator-maven-plugin</artifactId><version>1.3.2</version><dependencies><!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency></dependencies><configuration><overwrite>true</overwrite></configuration></plugin></plugins></build></project>

访问所有数据

1.2 前端工作

为了后期方便维护，我们先将所有的后端接口通过一个文件来保存，在根目录下新建config文件夹随后建立api.js文件

// 以下是业务服务器API地址// 本机开发API地址var WxApiRoot = 'http://localhost:8080/wx/';// 测试环境部署api地址// var WxApiRoot = 'http://192.168.0.101:8070/demo/wx/';// 线上平台api地址//var WxApiRoot = 'https://www.oa-mini.com/demo/wx/';module.exports = {IndexUrl: WxApiRoot + 'home/index', //首页数据接口SwiperImgs: WxApiRoot+'swiperImgs', //轮播图MettingInfos: WxApiRoot+'meeting/list', //会议信息};

1.2.1请求方式的封装

 loadMeetingInfos(){let that=this;wx.request({url: api.IndexUrl,dataType: 'json',success(res) {console.log(res)that.setData({lists:res.data.data.infoList})}})}

在/utils/util.js中添加下列代码:

/*** 封装微信的request请求*/
function request(url, data = {}, method = "GET") {return new Promise(function (resolve, reject) {wx.request({url: url,data: data,method: method,header: {'Content-Type': 'application/json',},success: function (res) {if (res.statusCode == 200) {resolve(res.data);//会把进行中改变成已成功} else {reject(res.errMsg);//会把进行中改变成已失败}},fail: function (err) {reject(err)}})});
}

注意在module.exports中导出和需要使用的页面js中使用时定义：const util = require("../../utils/util")

 //首页会议信息的ajaxloadMeetingInfos() {let that = this;util.request(api.IndexUrl).then(res => {this.setData({lists: res.data.infoList})})}

二，实现数据交互

前端wxml:

<!--index.wxml-->
<view><swiper autoplay="true" indicator-dots="true"><block wx:for="{{imgSrcs}}" wx:key="text"><swiper-item><view><image src="{{item.img}}" class="swiper-item" /></view></swiper-item></block></swiper>
</view><view class="mobi-title"><text class="mobi-icon"></text><text class="mobi-text">会议信息</text>
</view>
<block wx:for-items="{{lists}}" wx:for-item="item" wx:key="item.id"><view class="list" data-id="{{item.id}}"><view class="list-img"><image class="video-img" mode="scaleToFill" src="{{item.image !=null? item.image : '/static/persons/6.png'}}"></image></view><view class="list-detail"><view class="list-title"><text>{{item.title}}</text></view><view class="list-tag"><view class="state">{{item.state}}</view><view class="join"><text class="list-num">{{item.num}}</text>人报名</view></view><view class="list-info"><text>{{item.location}}</text>|<text>{{item.starttime}}</text></view></view></view>
</block>
<view class="section"><text>到底啦</text>
</view>

前端wxss:

/**index.wxss**/
.section{color: #aaa;display: flex;justify-content: center;
}.list-info {color: #aaa;
}.list-num {color: #e40909;font-weight: 700;
}.join {padding: 0px 0px 0px 10px;color: #aaa;
}.state {margin: 0px 6px 0px 6px;border: 1px solid #93b9ff;color: #93b9ff;
}.list-tag {padding: 3px 0px 10px 0px;display: flex;align-items: center;
}.list-title {display: flex;justify-content: space-between;font-size: 11pt;color: #333;font-weight: bold;}.list-detail {display: flex;flex-direction: column;margin: 0px 0px 0px 15px;
}.video-img {width: 80px;height: 80px;
}.list {display: flex;flex-direction: row;border-bottom: 1px solid #6b6e74;padding: 10px;
}.mobi-text {font-weight: 700;padding: 15px;
}.mobi-icon {border-left: 5px solid #e40909;
}.mobi-title {background-color: rgba(158, 158, 142, 0.678);margin: 10px 0px 10px 0px;
}.swiper-item {height: 300rpx;width: 100%;border-radius: 10rpx;
}.userinfo {display: flex;flex-direction: column;align-items: center;color: #aaa;
}.userinfo-avatar {overflow: hidden;width: 128rpx;height: 128rpx;margin: 20rpx;border-radius: 50%;
}.usermotto {margin-top: 200px;
}

三，WXS的使用

WXS 代码可以编写在 wxml 文件中的 <wxs> 标签内，或以 .wxs 为后缀名的文件内

在wxs中，可以使用一些内置的方法和对象来实现数据处理，如Math、Date等。同时，也可以使用一些自定义的函数和变量来实现特定的业务逻辑

通过后台数据交互和wxs应用，可以实现小程序的数据展示、数据操作和业务逻辑的实现。同时，也可以提高小程序的性能和用户体验

3.1 WXS文件

在项目中的utils文件中创建 .wxs 文件，名为: comm.wxs

comm.wxs代码：

function getState(state){// 状态：0取消会议1待审核2驳回3待开4进行中5开启投票6结束会议，默认值为1if(state == 0 ){return '取消会议';}else if(state == 1 ){return '待审核';}else if(state == 2 ){return '驳回';}else if(state == 3 ){return '待开';}else if(state == 4 ){return '进行中';}else if(state == 5 ){return '开启投票';}else if(state == 6 ){return '结束会议';}return '其它';}
var getNumber = function(str) {var s = str+'';var array = s.split(',');var len = array.length;return len;
}
function formatDate(ts, option) {var date = getDate(ts)var year = date.getFullYear()var month = date.getMonth() + 1var day = date.getDate()var week = date.getDay()var hour = date.getHours()var minute = date.getMinutes()var second = date.getSeconds()//获取 年月日if (option == 'YY-MM-DD') return [year, month, day].map(formatNumber).join('-')//获取 年月if (option == 'YY-MM') return [year, month].map(formatNumber).join('-')//获取 年if (option == 'YY') return [year].map(formatNumber).toString()//获取 月if (option == 'MM') return  [mont].map(formatNumber).toString()//获取 日if (option == 'DD') return [day].map(formatNumber).toString()//获取 年月日 周一 至 周日if (option == 'YY-MM-DD Week')  return [year, month, day].map(formatNumber).join('-') + ' ' + getWeek(week)//获取 月日 周一 至 周日if (option == 'MM-DD Week')  return [month, day].map(formatNumber).join('-') + ' ' + getWeek(week)//获取 周一 至 周日if (option == 'Week')  return getWeek(week)//获取 时分秒if (option == 'hh-mm-ss') return [hour, minute, second].map(formatNumber).join(':')//获取 时分if (option == 'hh-mm') return [hour, minute].map(formatNumber).join(':')//获取 分秒if (option == 'mm-dd') return [minute, second].map(formatNumber).join(':')//获取 时if (option == 'hh')  return [hour].map(formatNumber).toString()//获取 分if (option == 'mm')  return [minute].map(formatNumber).toString()//获取 秒if (option == 'ss') return [second].map(formatNumber).toString()//默认 时分秒 年月日return [year, month, day].map(formatNumber).join('-') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}
function formatNumber(n) {n = n.toString()return n[1] ? n : '0' + n
}function getWeek(n) {switch(n) {case 1:return '星期一'case 2:return '星期二'case 3:return '星期三'case 4:return '星期四'case 5:return '星期五'case 6:return '星期六'case 7:return '星期日'}
}
function  getNum(canyuze,liexize,zhuchiren){var  person= (canyuze +","+liexize+","+zhuchiren);return person.split(",").length;
};
module.exports = {getState: getState,getNumber: getNumber,formatDate:formatDate
};

util.js:

const formatTime = date => {const year = date.getFullYear()const month = date.getMonth() + 1const day = date.getDate()const hour = date.getHours()const minute = date.getMinutes()const second = date.getSeconds()return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}`
}const formatNumber = n => {n = n.toString()return n[1] ? n : `0${n}`
}
/*** 封装微信的request请求*/
function request(url, data = {}, method = "GET") {return new Promise(function (resolve, reject) {wx.request({url: url,data: data,method: method,header: {'Content-Type': 'application/json',},success: function (res) {if (res.statusCode == 200) {resolve(res.data);//会把进行中改变成已成功} else {reject(res.errMsg);//会把进行中改变成已失败}},fail: function (err) {reject(err)}})});
}module.exports = {formatTime,request
}

再修改首页页面中的 index.wxml 文件，在需要使用的页面进行引用即可

  <wxs src="/utils/comm.wxs" module="tools" />
<view> {{tools.msg}} </view>
<view> {{tools.bar(tools.FOO)}} </view>

3.2 页面

前端首页总代码

<!-- <wxs src="../../utils/util"> </wxs> --><view class="indexbg"><swiper autoplay="true" indicator-dots="true" indicator-color="#fff" indicator-active-color="#00f"><block wx:for="{{imgSrcs}}" wx:key="text"><swiper-item><view><image src="{{item.img}}" class="swiper-item" /></view></swiper-item></block></swiper><wxs src="/utils/comm.wxs" module="tools" />
<view> {{tools.msg}} </view>
<view> {{tools.bar(tools.FOO)}} </view><view class="mobi-title"><text class="mobi-text">会议信息</text></view><block wx:for-items="{{lists}}" wx:for-item="item" wx:key="item.id" class="bg"><view class="list" data-id="{{item.id}}"><view class="list-img"><image class="video-img" mode="scaleToFill" src="{{item.image!=null?item.image:'/static/persons/2.jpg'}}"></image></view><view class="list-detail"><view class="list-title"><text>{{item.title}}</text></view><view class="list-tag"><view class="state">{{tools.getState(item.state)}}</view><view class="join"><text class="list-num">{{tools.getNumber(item.canyuze,item.liexize,item.zhuchiren)}}</text>人报名</view></view><view class="list-info"><text>{{item.location}}</text>|<text>{{tools.formatDate(item.starttime)}}</text></view></view></view></block><view class="section"><text>到底啦</text></view>
</view>

效果：