微信小程序实现多选框全选与反全选及购物车中删除选中的商品功能

//删除购物车商品的按钮
 <view bindtap="delete_car" class="btn_delete">删除</view>
//购物车商品部分
 <checkbox-group bindchange="checkboxChange">
  <view wx:for="{{car_goods}}" class="car_list" wx:key="key" > 
   <label class="checkbox">
   <checkbox value="{{item.goods_id}}" checked="{{item.checked}}" class="checkbox"/> 
   </label>
   <image src="/static/images/goods/{{item.goods_picture}}" class="goods_img" bindtap="gotodetail"></image> 
   <view class="box1" bindtap="gotodetail">
   <view class="goods_name" >{{item.goods_name}}</view>
   <view class="fahuo">24小时内发货</view>
   <view class="goods_price"style="color: rgb(241, 32, 32)">￥{{item.goods_price}}</view>
   </view>
   <view class="box2" >
   <image src="/static/images/commom/jian.png" class="jian_img" bindtap="add_goods"></image>
   <text class="goods_num">1</text>
   <image src="/static/images/commom/jia.png" class="jia_img" bindtap="delete_goods"></image>
   </view>
  </view>
 </checkbox-group>

//全选框
 <checkbox class="checkbox" bindtap="selectall"/> 
 <view class="quanxuan">全选</view>

data: {
 select_all: false,
 car_goods:[
 ],
 checkbox_goodsid:'',
 },
 /**
 * 全选与反全选
 */
 selectall: function (e) {
 var that = this;
 var arr = '0';
 //that.data.car_goods.length是商品的个数
 for (let i = 0; i < that.data.car_goods.length; i++) {
 //循环给每个商品的checked赋值
  that.data.car_goods[i].checked = (!that.data.select_all)
  if (that.data.car_goods[i].checked == true) {
  // 全选获取选中的值 以字符串拼接的形式 拼成一个字符串
   arr = arr +","+ that.data.car_goods[i].goods_id;
  }
 }
 console.log("arr="+arr)
 //赋值
 that.setData({
  car_goods: that.data.car_goods,
  select_all: (!that.data.select_all),
  checkbox_goodsid: arr
 })
 },
 
 // 单选
 checkboxChange: function (e) {
 var that =this;
 //这加个0 是我为了方便后台处理。
 var checkbox_goodsid = 0+ ','+that.data.checkbox_goodsid
 this.setData({
  checkbox_goodsid: checkbox_goodsid//单个选中的值
 })
 console.log("checkbox_goodsid=" +that.data.checkbox_goodsid)
 },

/**
 * 删除选中的商品
 */
 delete_car:function(){
 var that = this
 var checkbox_goodsid = that.data.checkbox_goodsid
 console.log("点击删除选中的商品id" + checkbox_goodsid)
 if (checkbox_goodsid==""){
  wx.showToast({
  title: '您尚未选中商品',
  duration: 2000,//持续时间
  icon: 'none'
  })
 }
 else{
  wx.showModal({
  title: '提示',
  content: '您是否要删除已选中商品',
  success: function (res) {
   if (res.confirm) {//这里是点击了确定以后
   //删除购物车的所有商品
   console.log("点击确定的商品id" + checkbox_goodsid)
   wx.request({
    url: 'http://localhost:8080/delete_choosegoods',
    data:{
    checkbox_goodsid: checkbox_goodsid
    },
    success: function (e) {
    //页面刷新
    const pages = getCurrentPages()
    const perpage = pages[pages.length - 1]
    perpage.onLoad() 
    }
   })
   } else {//这里是点击了取消以后
   console.log('用户点击取消')
   }
  }
  })
 }
 },

/*
 * 删掉购物车选中的商品
* */
 @RequestMapping("/delete_choosegoods")
 public Integer delete_choosegoods(String checkbox_goodsid){
  System.out.println("checkbox_goodsid::"+checkbox_goodsid);
  String openid = (String) redisTemplate.boundValueOps("openid").get();
  int n = 0;

  String[] arrays2 =checkbox_goodsid.split(",");
  System.out.println(",分割后的0"+arrays2[0]);

   for(int i=1;i<arrays2.length;i++){
   int goods_id = Integer.parseInt(arrays2[i].toString());
    System.out.println("goods_id"+goods_id);
   n = goodsService.delete_cargoods(openid,goods_id);
  }
  return n;
 }

arr = arr.concat(that.data.listData[i].code.split(','));

String[] arrays = checkbox_goodsid.split("]");
System.out.println("]分割后的arrays[0]"+arrays[0]);

String[] arrays1= arrays[0].split(" \\[");
System.out.println("[分割后的0："+arrays1[0]);
 
String[] arrays2 =arrays1[arrays1.length-1].split(",");
System.out.println(",分割后的0"+arrays2[0]);
for(int i=1;i<arrays2.length;i++){
//这里通过"分割获取信息，但需要用\"对双引号进行转义
获取后转成整型。
 }