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 {
    @Autowired
    private 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ajax
  loadMeetingInfos() {
    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1
  if(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() + 1
  var 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() + 1
  const 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：