不是因为生活太现实，而对生活失望；而是知道生活太现实，所以更要用心的活下去。给自己一个拥抱。
vue-draggable
之前项目中需要用到拖动排序，就去网上找资料，本来最开始是想用jquery-ui里的拖动的，后面发现不符合我的预期也不知道能不能跟vue.js兼容，后面我试过了，单个的可以但是层级太多就不一样了。
废话少说直接上代码
先看数据结构，和页面的呈现，等会再来上代码。
这就是三层结构渲染出来的图。那个海锚一样的东西是可以点击的，点击后会出现当前类型所带的产品。等会会说的
我们现在来看下我实现后的拖动效果，如下
所有父类型里面的产品拖动如下
控制台的打印
好了，放了那么多图，数据结构也发了。接下来我们来上代码和思路。
先上html的代码，这里我的页面是jsp，但是不影响html兼容，项目中途接手，很古老的jsp我也没办法
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:set var="ctx" value="${pageContext.request.contextPath}"/>
<link rel="stylesheet" rel="nofollow noopener noreferrer" href="${ctx}/res/ifw/plugins/datatables/dataTables.bootstrap.css" rel="external nofollow" />
<style>
[v-cloak] {
display: none;
}
.flip-list-move {
transition: transform 0.5s;
}
.handle {
float: right;
padding-top: 2px;
padding-bottom: 8px;
}
.no-move {
transition: transform 0s;
}
.ghost {
opacity: 0.5;
background: #c8ebfb;
}
.list-group {
min-height: 20px;
}
.list-group-item {
cursor: move;
}
.list-group-item i {
cursor: pointer;
}
</style>
<div id="vueSort" class="box box-darkness">
<div class="box-header with-border">
<h3 class="box-title">排序</h3>
<div class="box-tools pull-right">
<button type="button" class="btn btn-box-tool" data-widget="collapse"><i class="fa fa-minus"></i>
</button>
</div>
</div>
<div class="box-body" style="position: relative">
<div class="col-md-3">
<ul id="main-nav1" class="nav nav-tabs nav-stacked">
<draggable class="list-group" tag="ul" v-model="listProductType":move="getdata" @update="datadragEnd">
<transition-group type="transition" :name="'flip-list'">
<li class="list-group-item" v-for="(element,index) in listProductType" :key="element.id">
<a :rel="nofollow noopener noreferrer" href="'#'+forId(element.uuid)" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="nav-header collapsed" data-toggle="collapse"><i
v-show="element.productList.length>0"
aria-hidden="true"
:class="{'fa fa-anchor':isActive,'glyphicon glyphicon-pushpin':!isActive}"
@click="submenu"></i></a>
{{element.name}}
<i class="fa fa-align-justify handle" v-show="element.productTypes.length>0"
@click="showLeve2(index)"></i>
<template v-if="element.productList.length>0">
<ur :id="forId(element.uuid)" class="nav nav-list collapse secondmenu">
<draggable class="list-group" tag="ul":move="getdata" v-model="element.productList"
@update="datadragEnds">
<transition-group type="transition" :name="'flip-list'">
<li class="list-group-item" v-for="e in element.productList" :key="e.id">
<a> {{e.name}}</a>
</li>
</transition-group>
</draggable>
</ur>
</template>
</li>
</transition-group>
</draggable>
</ul>
</div>
<div class="col-md-3" v-show="one.productTypes.length>0&&showOne">
<span><h3 style="color: red">--->>>{{one.name}}</h3></span>
<ul id="main-nav2" class="nav nav-tabs nav-stacked">
<draggable class="list-group" tag="ul" v-model="one.productTypes" :move="getdata"@update="datadragEnd">
<transition-group type="transition" :name="'flip-list'">
<li class="list-group-item" v-for="(element,index) in one.productTypes" :key="element.id">
<a :rel="nofollow noopener noreferrer" href="'#'+forId(element.uuid)" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="nav-header collapsed" data-toggle="collapse"><i
v-show="element.productList.length>0"
aria-hidden="true"
:class="{'fa fa-anchor':isActive,'glyphicon glyphicon-pushpin':!isActive}"
@click="submenu"></i></a>
{{element.name}}
<i class="fa fa-align-justify handle" v-show="element.productTypes.length>0"
@click="showLeve3(index)"></i>
<template v-if="element.productList.length>0">
<ur :id="forId(element.uuid)" class="nav nav-list collapse secondmenu">
<draggable class="list-group" tag="ul":move="getdata" v-model="element.productList"
@update="datadragEnds">
<transition-group type="transition" :name="'flip-list'">
<li class="list-group-item" v-for="e in element.productList" :key="e.id">
<a> {{e.name}}</a>
</li>
</transition-group>
</draggable>
</ur>
</template>
</li>
</transition-group>
</draggable>
</ul>
</div>
<div class="col-md-3" v-show="two.productTypes.length>0&&showTwo">
<span><h3 style="color: red">--->>>{{two.name}}</h3></span>
<ul id="main-nav3" class="nav nav-tabs nav-stacked">
<draggable class="list-group" tag="ul" v-model="two.productTypes":move="getdata" @update="datadragEnd">
<transition-group type="transition" :name="'flip-list'">
<li class="list-group-item" v-for="(element,index) in two.productTypes" :key="element.id">
<a :rel="nofollow noopener noreferrer" href="'#'+forId(element.uuid)" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="nav-header collapsed" data-toggle="collapse"><i
v-show="element.productList.length>0"
aria-hidden="true"
:class="{'fa fa-anchor':isActive,'glyphicon glyphicon-pushpin':!isActive}"
@click="submenu"></i></a>
{{element.name}}
<template v-if="element.productList.length>0">
<ur :id="forId(element.uuid)" class="nav nav-list collapse secondmenu">
<draggable class="list-group":move="getdata" tag="ul" v-model="element.productList"
@update="datadragEnds">
<transition-group type="transition" :name="'flip-list'">
<li class="list-group-item" v-for="e in element.productList" :key="e.id">
<a> {{e.name}}</a>
</li>
</transition-group>
</draggable>
</ur>
</template>
</li>
</transition-group>
</draggable>
</ul>
</div>
</div>
<div class="box-footer">
<button type="button" class="btn btn-darkness pull-right" id="doSearch"
style="margin-left: 20px;"@click="save">保存
</button>
<button type="button" class="btn btn-default pull-right" @click="reset" id="resetSearch">重置</button>
</div>
</div>
<script type="text/javascript" src="${ctx}/res/js/vue/vue.js"></script>
<!-- CDNJS :: Sortable (https://cdnjs.com/) -->
<script src="${ctx}/res/js/vue/Sortable.min.js"></script>
<!-- CDNJS :: Vue.Draggable (https://cdnjs.com/) -->
<script src="${ctx}/res/js/vue/vuedraggable.umd.min.js"></script>
<script type="text/javascript" src="${ctx}/res/js/sort/combinationSort.js"></script>
接下来是js。
Vue.component('vue-draggable', vuedraggable)
var vm = new Vue({
el: '#vueSort',
data: {
isActive: true,
queryObject: {},
listProductType: [],
showSon: false,
index: 0,
one: {productTypes: []},
two: {productTypes: []},
showOne: false,
showTwo: false
},
methods: {
init: function () {
var _this = this;
$.ajax({
url: '../../mt/combinationSort/sortingData',
data: null,
type: 'POST',
contentType: "application/json",
dataType: 'json',
success: function (data) {
if (data.success = true) {
if (data.dataObject.length == 0) {
Util.alert('通知', '异常数据', 'info');
return;
}
_this.listProductType = data.dataObject;
}
console.log(data)
}
})
},
reset: function () {
var _this = this;
_this.listProductType = _this.listProductType.sort((one, two) => {
return one.displaySeq - two.displaySeq;
})
;
for (var i in _this.listProductType) {
//排序产品类型
_this.listProductType[i].productTypes = _this.listProductType[i].productTypes.sort((one, two) => {
return one.displaySeq - two.displaySeq;
})
;
//排序产品
_this.listProductType[i].productList = _this.listProductType[i].productList.sort((one, two) => {
return one.displaySeq - two.displaySeq;
})
;
for (var a in _this.listProductType[i].productTypes) {
_this.listProductType[i].productTypes[a].productTypes = _this.listProductType[i].productTypes[a].productTypes.sort((one, two) => {
return one.displaySeq - two.displaySeq;
})
;
_this.listProductType[i].productTypes[a].productList = _this.listProductType[i].productTypes[a].productList.sort((one, two) => {
return one.displaySeq - two.displaySeq;
})
;
for (var c in _this.listProductType[i].productTypes[a].productTypes) {
_this.listProductType[i].productTypes[a].productTypes[c].productList = _this.listProductType[i].productTypes[a].productTypes[c].productList.sort((one, two) => {
return one.displaySeq - two.displaySeq;
})
;
}
}
}
},
datadragEnd: function (evt) {
console.log('拖动前的索引：' + evt.oldIndex);
console.log('拖动后的索引：' + evt.newIndex);
var obj = evt.item;
obj.style.backgroundColor = '#fff';
},
submenu: function () {
var _this = this;
if (_this.isActive) _this.isActive = false;
else _this.isActive = true;
if (_this.showSon) _this.showSon = false;
else _this.showSon = true;
},
datadragEnds: function (evt) {
console.log('拖动前的索引：' + evt.oldIndex);
console.log('拖动后的索引：' + evt.newIndex);
var obj = evt.item;
obj.style.backgroundColor = '#fff';
},
forId: function (index) {
return "uuid_" + index
},
showLeve2: function (index) {
var _this = this;
_this.index = index;
// if (_this.one.productTypes.length > 0) _this.one.productTypes = [];
// else
_this.one = _this.listProductType[index];
console.log(_this.one)
if (_this.showOne) {
_this.showOne = false;
_this.showTwo = false;
}
else _this.showOne = true;
},
showLeve3: function (index) {
var _this = this;
// if (_this.two.productTypes.length > 0) _this.two.productTypes = [];
// else
_this.two = _this.listProductType[_this.index].productTypes[index];
console.log(_this.two.productTypes)
if (_this.showTwo) _this.showTwo = false;
else _this.showTwo = true;
},
getdata: function (event) {
console.log("下来了");
var obj = event.dragged;
obj.style.backgroundColor = '#11cc17';
},
save: function () {
var _this = this;
Util.confirm('提示', '您确定要保存排序吗？', function (isOk) {
if (isOk) {
console.log(_this.listProductType);
$.ajax({
type: "post",
url: "../../mt/combinationSort/saveSortingData",
data: {list: JSON.stringify(_this.listProductType)},
success: function (json) {
console.log(json);
}
});
Util.alert("提示", '保存成功', 'info');
}
}, 'info');
}
},
created: function () {
var _this = this;
_this.init();
// _this.heartbeat();
}
});
最重要的是这几行代码
然后是使用vue把vuedraggable模块引入，上面图最下面的js是我刚刚发过的代码文件。
Vue.component('vue-draggable', vuedraggable)
这句话显得尤为重要。注册成vue的组件，虽然它本身就是vue的一个组件了。
当然最后我们会进行排序后的顺序的保存。这里就不得不说vue的双向绑定了，你对象只要在页面改变位置，在内存地址里的位置顺序也会被改变的，所有我们只需要再次将整个对象回传就行。后台去解析保存，当然这种方式我觉得会很繁琐。比如：我贴个获取数据的代码
/**
* 获取排序数据
* * @param merchantId
* @return
*/
public List<SortProductTypeVo> treeSorting(Long merchantId) {
//获取所有的连接项
List<ProductTypeRef> typeRefList = productTypeRefService.findAll();
//获取所有的产品
Map<Long, ProductVo> productList = productService.sortFindProduct(merchantId).stream().collect(
Collectors.toMap(w -> w.getId(), w -> w));
//最上级父级
List<SortProductTypeVo> parentList = byParentProduct(merchantId, 0);
//平均未分类
List<SortProductTypeVo> typeList = byParentProduct(merchantId, 1);
//
//获取产品类型和产品关联
Map<Long, List<ProductTypeRef>> parentIdChildrenMap = typeRefList.stream().filter(productTypeRef -> productTypeRef.getProductTypeId() != null).collect(Collectors.groupingBy(ProductTypeRef::getProductTypeId));
parentList.forEach(p -> {
//筛选第二级菜单
List<SortProductTypeVo> districtsOne = typeList.stream().filter(sortProductTypeVo -> sortProductTypeVo.getParentTypeId().equals(p.getId())).collect(Collectors.toList());
districtsOne.forEach(a -> {
//第三层菜单
List<SortProductTypeVo> districtsTwo = typeList.stream().filter(productType -> productType.getParentTypeId().equals(a.getId())).collect(Collectors.toList());
districtsTwo.stream().forEach(d -> {
//获取产品和产品类型之间的连接关系
List<ProductTypeRef> l = parentIdChildrenMap.getOrDefault(d.getId(), new ArrayList<>());
//排序产品关联就相当于产品排序
l.sort((q, b) -> Integer.compare(q.getDisplaySeq(), b.getDisplaySeq()));
//根据排序产品关联去找到产品
d.setProductList(l.stream().map(e -> {
ProductVo products = productList.get(e.getProductId());
if (null != products) products.setDisplaySeq(e.getDisplaySeq());
return products;
}).collect(Collectors.toList()).stream().filter(s -> s != null).collect(Collectors.toList()));//数组中过滤空的产品
// d.setProductTypeRefs(parentIdChildrenMap.getOrDefault(d.getId(), new ArrayList<>()));
});
List<ProductTypeRef> l = parentIdChildrenMap.getOrDefault(a.getId(), new ArrayList<>());
l.sort((q, b) -> Integer.compare(q.getDisplaySeq(), b.getDisplaySeq()));
a.setProductList(l.stream().map(c -> {
ProductVo products = productList.get(c.getProductId());
if (null != products) products.setDisplaySeq(c.getDisplaySeq());
return products;
}).collect(Collectors.toList()).stream().filter(s -> s != null).collect(Collectors.toList()));
districtsTwo.sort((q, b) -> Integer.compare(q.getDisplaySeq(), b.getDisplaySeq()));
a.setProductTypes(districtsTwo);
// a.setProductTypeRefs(parentIdChildrenMap.getOrDefault(a.getId(), new ArrayList<>()));
});
List<ProductTypeRef> l = parentIdChildrenMap.getOrDefault(p.getId(), new ArrayList<>());
l.sort((q, b) -> Integer.compare(q.getDisplaySeq(), b.getDisplaySeq()));
p.setProductList(l.stream().map(a -> {
ProductVo products = productList.get(a.getProductId());
if (null != products) products.setDisplaySeq(a.getDisplaySeq());
return products;
}).collect(Collectors.toList()).stream().filter(s -> s != null).collect(Collectors.toList()));
// p.setProductTypeRefs(parentIdChildrenMap.getOrDefault(p.getId(), new ArrayList<>()));
districtsOne.sort((q, b) -> Integer.compare(q.getDisplaySeq(), b.getDisplaySeq()));
p.setProductTypes(districtsOne);
});
parentList.sort((q, b) -> Integer.compare(q.getDisplaySeq(), b.getDisplaySeq()));
return parentList;
}
jdk8语法，可能还有需要改进的地方。反正目前来说，功能是实现了。
其实本来想代码一点点讲解的，奈何实在是有事。
关于怎么让3级菜单组件相互拖动，你只需要在父级相互拖动这里就能找到答案，
加上这个属性就行，理论上。我没试过，因为我懒，hhhh
总结
以上所述是小编给大家介绍的基于vue-draggable 实现三级拖动排序效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！ 如果你觉得本文对你有帮助，欢迎转载，烦请注明出处，谢谢！
以上就是基于vue-draggable 如何实现三级拖动排序效果。有记者问：“你在企业中应当是什么角色？”张瑞敏答：“第一，应是设计师；第二，应是牧师。”更多关于基于vue-draggable 如何实现三级拖动排序效果请关注haodaima.com其它相关文章！
