瑞吉外卖项目学习笔记：P16-套餐信息分页查询功能开发
P16-套餐信息分页查询功能开发
- 1.需求分析
- 2.代码开发
-
- 2.1前后端交互流程
- 2.2前端代码
-
- 2.2.1 页面代码list.html
- 2.2.2js代码
- 2.3后端代码开发SetmealController
1.需求分析
系统中的套餐数据很多的时候，如果在一个页面中全部展示出来会显得比较乱，不便于查看,所以一般的系统中都会以分页的方式来展示列表数据。
2.代码开发
2.1前后端交互流程
-
页面(backend/ page/combo/ list.html)发送ajax请求,将分页查询参数(page、pageSize 、name)提交到服务端，获取分页数据
-
页面发送请求，请求服务端进行图片下载，用于页面图片展示
开发套餐信息分页查询功能，其实就是在服务端编写代码去处理前端页面发送的这2次请求即可。
2.2前端代码
2.2.1 页面代码list.html
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Documenttitle>
<link rel="stylesheet" href="../../plugins/element-ui/index.css" />
<link rel="stylesheet" href="../../styles/common.css" />
<link rel="stylesheet" href="../../styles/page.css" />
head>
<body>
<div class="dashboard-container" id="combo-app">
<div class="container">
<div class="tableBar">
<el-input
v-model="input"
placeholder="请输入套餐名称"
style="width: 250px"
clearable
@keyup.enter.native="handleQuery"
>
<i
slot="prefix"
class="el-input__icon el-icon-search"
style="cursor: pointer"
@click="init"
>i>
el-input>
<div class="tableLab">
<span class="span-btn delBut non" @click="deleteHandle('批量')">批量删除span>
<span class="span-btn blueBug non" @click="statusHandle('1')">批量启售span>
<span
style="border:none;"
class="span-btn delBut non"
@click="statusHandle('0')"
>批量停售span>
<el-button
type="primary"
@click="addSetMeal('add')"
>
+ 新建套餐
el-button>
div>
div>
<el-table
:data="tableData"
stripe
class="tableBox"
@selection-change="handleSelectionChange"
>
<el-table-column
type="selection"
width="25"
>el-table-column>
<el-table-column
prop="name"
label="套餐名称"
>el-table-column>
<el-table-column prop="image" label="图片" align="center">
<template slot-scope="{ row }">
<el-image style="width: auto; height: 40px; border:none;cursor: pointer;" :src="getImage(row.image)" :preview-src-list="[ `/common/download?name=${row.image}` ]" >
<div slot="error" class="image-slot">
<img src="./../../images/noImg.png" style="width: auto; height: 40px; border:none;" >
div>
el-image>
template>
el-table-column>
<el-table-column
prop="categoryName"
label="套餐分类"
>el-table-column>
<el-table-column
prop="price"
label="套餐价"
>
<template slot-scope="scope">
<span>￥{{ scope.row.price/100 }}span>
template>
el-table-column>
<el-table-column label="售卖状态">
<template slot-scope="scope">
<span>{{ scope.row.status == '0' ? '停售' : '启售' }}span>
template>
el-table-column>
<el-table-column
prop="updateTime"
label="最后操作时间"
>
el-table-column>
<el-table-column
label="操作"
width="160"
align="center"
>
<template slot-scope="scope">
<el-button
type="text"
size="small"
class="blueBug"
@click="addSetMeal(scope.row.id)"
>
修改
el-button>
<el-button
type="text"
size="small"
class="blueBug"
@click="statusHandle(scope.row)"
>
{{ scope.row.status == '0' ? '启售' : '停售' }}
el-button>
<el-button
type="text"
size="small"
class="delBut non"
@click="deleteHandle('单删', scope.row.id)"
>
删除
el-button>
template>
el-table-column>
el-table>
<el-pagination
class="pageList"
:page-sizes="[10, 20, 30, 40]"
:page-size="pageSize"
layout="total, sizes, prev, pager, next, jumper"
:total="counts"
@size-change="handleSizeChange"
:current-page.sync="page"
@current-change="handleCurrentChange"
>el-pagination>
div>
div>
<script src="../../plugins/vue/vue.js">script>
<script src="../../plugins/element-ui/index.js">script>
<script src="../../plugins/axios/axios.min.js">script>
<script src="../../js/request.js">script>
<script src="../../api/combo.js">script>
<script>
new Vue({
el: '#combo-app',
data() {
return {
input: '',
counts: 0,
page: 1,
pageSize: 10,
tableData : [],
dishState : '',
checkList: []
}
},
computed: {},
created() {
this.init()
},
mounted() {
},
methods: {
async init () {
const params = {
page: this.page,
pageSize: this.pageSize,
name: this.input ? this.input : undefined
}
await getSetmealPage(params).then(res => {
if (String(res.code) === '1') {
this.tableData = res.data.records || []
this.counts = res.data.total
}
}).catch(err => {
this.$message.error('请求出错了：' + err)
})
},
getImage (image) {
return `/common/download?name=${image}`
},
handleQuery() {
this.page = 1;
this.init();
},
// 添加
addSetMeal (st) {
if (st === 'add'){
window.parent.menuHandle({
id: '5',
url: '/backend/page/combo/add.html',
name: '添加套餐'
},true)
} else {
window.parent.menuHandle({
id: '5',
url: '/backend/page/combo/add.html?id='+st,
name: '修改套餐'
},true)
}
},
// 删除
deleteHandle (type, id) {
if (type === '批量' && id === null) {
if (this.checkList.length === 0) {
return this.$message.error('请选择删除对象')
}
}
this.$confirm('确定删除该套餐, 是否继续?', '确定删除', {
'confirmButtonText': '确定',
'cancelButtonText': '取消',
}).then(() => {
deleteSetmeal(type === '批量' ? this.checkList.join(',') : id).then(res => {
if (res.code === 1) {
this.$message.success('删除成功！')
this.handleQuery()
} else {
this.$message.error(res.msg || '操作失败')
}
}).catch(err => {
this.$message.error('请求出错了：' + err)
})
})
},
//状态更改
statusHandle (row) {
let params = {}
if (typeof row === 'string' ){
if (this.checkList.length == 0){
this.$message.error('批量操作，请先勾选操作菜品！')
return false
}
params.ids = this.checkList.join(',')
params.status = row
} else {
params.ids = row.id
params.status = row.status ? '0' : '1'
}
this.$confirm('确认更改该套餐状态?', '提示', {
'confirmButtonText': '确定',
'cancelButtonText': '取消',
'type': 'warning'
}).then(() => {
// 起售停售---批量起售停售接口
setmealStatusByStatus(params).then(res => {
if (res.code === 1) {
this.$message.success('套餐状态已经更改成功！')
this.handleQuery()
} else {
this.$message.error(res.msg || '操作失败')
}
}).catch(err => {
this.$message.error('请求出错了：' + err)
})
})
},
// 全部操作
handleSelectionChange (val){
let checkArr = []
val.forEach((n) => {
checkArr.push(n.id)
})
this.checkList = checkArr
},
handleSizeChange (val) {
this.pageSize = val
this.init()
},
handleCurrentChange (val) {
this.page = val
this.init()
}
}
})
script>
body>
html>
2.2.2js代码
// 查询列表数据
const getSetmealPage = (params) => {
return $axios({
url: '/setmeal/page',
method: 'get',
params
})
}
2.3后端代码开发SetmealController
/**
* 套餐分页查询
* @param page
* @param pageSize
* @param name
* @return
*/
@GetMapping("/page")
public R<Page> page(int page, int pageSize, String name){
log.info("page={},pageSize={},name={}",page,pageSize,name);
//构造分页条件构造器 page,pageSize
Page<Setmeal> pageInfo=new Page(page,pageSize);
Page<SetmealDto>setmealDtoPage =new Page<>();
LambdaQueryWrapper<Setmeal>queryWrapper=new LambdaQueryWrapper<>();
//添加查询条件，根据name
queryWrapper.like(name!=null,Setmeal::getName,name);
//添加查询条件
queryWrapper.orderByDesc(Setmeal::getUpdateTime);
//执行查询
setmealService.page(pageInfo,queryWrapper);
//对象拷贝pageInfo——》setmealDtoPage ,给setmealDtoPage 的categoryName赋值
BeanUtils.copyProperties(pageInfo,setmealDtoPage,"records");
List<Setmeal> records = pageInfo.getRecords();
List<SetmealDto>setmealDtoList= records.stream().map((item)->{
SetmealDto setmealDto = new SetmealDto();
//对象拷贝
BeanUtils.copyProperties(item,setmealDto);
//分类id
Long categoryId = item.getCategoryId();
//根据分类id，查询分类对象
Category category = categoryService.getById(categoryId);
if (category!=null){
String categoryName = category.getName();
setmealDto.setCategoryName(categoryName);
}
return setmealDto;
}).collect(Collectors.toList());
setmealDtoPage.setRecords(setmealDtoList);
return R.success(setmealDtoPage);
}