一套后台管理系统的入门级的增删改查（vue3组合式api+elemment-plus）-编程知识

一、页面示意：

图一

图二

二、组件结构

列表组件：index.vue,对应图一
添加组件：add.vue，对应图二，用抽屉效果
编辑组件：edit.vue，和添加组件的效果一个。

三、代码

1、列表组件: index.vue

<template><h1>增删改查案例</h1><div><!--查询条件  --><el-form :model="searchData" label-width="40px" :inline="true"><el-form-item label="书号"><el-input v-model="searchData.id" /></el-form-item><el-form-item label="书名"><el-input v-model="searchData.name" /></el-form-item><el-form-item label="作者"><el-input v-model="searchData.author" /></el-form-item><el-form-item label="价格"><el-input v-model="searchData.minprice" /></el-form-item><el-form-item label="-->"><el-input v-model="searchData.maxprice" /></el-form-item><el-form-item><el-button type="primary" @click="searchFn">查询</el-button><el-button @click="showAdd">添加</el-button></el-form-item></el-form></div><div><!-- 书籍列表 --><el-table :data="bookData" stripe style="width: 100%"><el-table-column prop="id" label="书号" width="180" /><el-table-column prop="name" label="书名" width="180" /><el-table-column prop="author" label="作者" /><el-table-column prop="price" label="价格" /><el-table-column  label="类型" ><template #default="scope"><span>{{typeObj[scope.row.type]}}</span></template></el-table-column><el-table-column label="图片"><template #default="scope"><img :src="scope.row.img" style="width: 100px;height: 100px" /></template></el-table-column><el-table-column fixed="right" label="操作" width="120"><template #default="scope"><el-button link type="primary" size="small" @click="showEdit(scope.row.id)">编辑</el-button><el-button link type="primary" size="small" @click.prevent="deleteBook(scope.row.id)">删除</el-button></template></el-table-column></el-table><el-drawer v-model="drawer" title="添加书籍" direction="rtl" :before-close="handleClose"><AddBook @close="closeFn" @ok="okFn"></AddBook></el-drawer><el-drawer v-model="drawerEdit" title="修改书籍" direction="rtl" ><EditBook :id="editId" @ok="editOkFn" @close="editCloseFn" ></EditBook></el-drawer></div>
</template><script  setup>
import { reactive, onMounted,ref } from "vue";
import { getBooksApi, getBooksByCondationApi, deleteBookApi } from "@/api/crud";
import AddBook from "./Add.vue";
import EditBook from "./edit.vue";const typeObj = {"new":"最新","hot":"热卖"
}// 书籍数据
let bookData = reactive([]);//一、 获取书籍信息
const getBooks = () => {getBooksApi().then(res => {if (res.data) {console.log("bookData前", bookData);// bookData = res.data;bookData.length = 0;bookData.push(...res.data);console.log("bookData后", bookData);}}).catch(err => {console.log("获取数据出错", err);})
}
onMounted(() => {getBooks();
})// 二、查询书籍
const searchData = reactive({"id": "","name": "","author": "","minprice": "","maxprice": ""
})const searchFn = () => {const temp = {};for (const key in searchData) {if (searchData[key] !== "") {temp[key] = searchData[key];}}if (temp["minprice"]) {delete temp["minprice"];temp["price_gte"] = searchData.minprice;}if (temp["maxprice"]) {delete temp["maxprice"];temp["price_lte"] = searchData.maxprice;}getBooksByCondationApi(temp).then(res => {if (res.data) {bookData.length = 0;bookData.push(...res.data);}})
}// 三、删除书籍
const deleteBook = (id) => {deleteBookApi(id).then(res => {console.log("删除的返回res", res);// 删除成功后，重新获取数据getBooks();})
}// 四、添加
const drawer = ref(false)const handleClose = (done) => {ElMessageBox.confirm('Are you sure you want to close this?').then(() => {done()}).catch(() => {// catch error})
}// 显示添加页面
const showAdd=()=>{drawer.value=true;
}const closeFn=()=>{drawer.value = false;
}const okFn=()=>{closeFn();getBooks();
}// 五、修改
const drawerEdit = ref(false);
const editId = ref("");//修改的书籍的id// 显示修改页面
const showEdit=(id)=>{editId.value=id;drawerEdit.value=true;
}const editCloseFn=()=>{editId.value ="";drawerEdit.value = false;
}const editOkFn=()=>{editCloseFn();getBooks();
}</script><style lang="css" scoped></style>

2、添加组件：add.vue

<template><el-form ref="formRef" :model="newBook" label-width="120px" :rules="rules"><el-form-item label="书号" prop="id"><el-input v-model="newBook.id" /></el-form-item><el-form-item label="书名" prop="name"><el-input v-model="newBook.name" /></el-form-item><el-form-item label="作者" prop="author"><el-input v-model="newBook.author" /></el-form-item><el-form-item label="价格" prop="price"><el-input v-model="newBook.price" /></el-form-item><el-form-item label="图片" prop="img"><el-input v-model="newBook.img" /></el-form-item><el-form-item label="类型" prop="type"><!-- <el-input v-model="newBook.type" /> --><el-select v-model="newBook.type" class="m-2" placeholder="请选择书籍类型" size="large"><!-- <el-option v-for="item in booktypes" :key="item.id" :label="item.name" :value="item.value" /> --><el-option label="最新" value="new" /><el-option label="热卖" value="hot" /></el-select></el-form-item><el-form-item><el-button type="primary" @click="addBookFn(formRef)">添加</el-button><el-button @click="cancelFn">取消</el-button></el-form-item></el-form>
</template><script  setup>
import { reactive, ref } from 'vue';
import { addBookApi,getBookTypeApi } from "@/api/crud"const emit = defineEmits(['close', "ok"]);const booktypes = reactive([]);const getBookType = () => {getBookTypeApi().then(res=>{if(res.data){booktypes.length=0;booktypes.push(...res.data);}})
}getBookType();const formRef = ref();
//  定义添加的书籍
const newBook = reactive({"id": "","name": "","author": "","price": 0,"img": "","type": ""
})// 表单验证的规则
const rules = reactive({"id": [{ required: true, message: '请输入书号', trigger: 'blur' }],"name": [{ required: true, message: '请输入书名', trigger: 'blur' }],"author": [{ required: true, message: '请输入作者', trigger: 'blur' }],"price": [{ required: true, message: '请输入价格', trigger: 'blur' }],"img": [{ required: true, message: '请输入图片地址', trigger: 'blur' }],"type": [{ required: true, message: '请输入类型', trigger: 'blur' }],
})const addBookFn = (formEl) => {if (!formEl) {return;}console.log("newBook",newBook);formEl.validate((isOk) => {if (isOk) {addBookApi(newBook).then(res => {console.log(res);if (res.data) {// 添加成功alert("添加成功！");// 关闭弹窗emit("ok");}}).catch(err => {})}})}const cancelFn = () => {emit('close');
}</script>

3、编辑组件：edit.vue

<template><el-form ref="formRef" :model="editBook" label-width="120px" :rules="rules"><el-form-item label="书号" prop="id"><el-input v-model="editBook.id" /></el-form-item><el-form-item label="书名" prop="name"><el-input v-model="editBook.name" /></el-form-item><el-form-item label="作者" prop="author"><el-input v-model="editBook.author" /></el-form-item><el-form-item label="价格" prop="price"><el-input v-model="editBook.price" /></el-form-item><el-form-item label="图片" prop="img"><el-input v-model="editBook.img" /></el-form-item><el-form-item label="类型" prop="type"><el-input v-model="editBook.type" /></el-form-item><el-form-item><el-button type="primary" @click="editBookFn(formRef)">修改</el-button><el-button @click="cancelFn">取消</el-button></el-form-item></el-form>
</template><script  setup>
import { reactive, ref,watch } from 'vue';
import { getBookDetailApi,editBookApi } from '@/api/crud';const props = defineProps(["id"]);const formRef = ref();//  定义修改的书籍
const editBook = reactive({"id": "","name": "","author": "","price": 0,"img": "","type": ""
})// 获取当前修改的书籍信息
const getBookDetail = async () => {try {const res = await getBookDetailApi(props.id);// editBook = res.data;for(let key in editBook){editBook[key] = res.data[key];}} catch (err) {console.log("服务器出错",err);}
}console.log("props",props);watch(props,()=>{console.log("props.id变了");getBookDetail();
},{deep:true,immediate:true})const emit = defineEmits(['close', "ok"]);// 表单验证的规则
const rules = reactive({"id": [{ required: true, message: '请输入书号', trigger: 'blur' }],"name": [{ required: true, message: '请输入书名', trigger: 'blur' }],"author": [{ required: true, message: '请输入作者', trigger: 'blur' }],"price": [{ required: true, message: '请输入价格', trigger: 'blur' }],"img": [{ required: true, message: '请输入图片地址', trigger: 'blur' }],"type": [{ required: true, message: '请输入类型', trigger: 'blur' }],
})const editBookFn = (formEl) => {if (!formEl) {return;}formEl.validate((isOk) => {if (isOk) {editBookApi(props.id,editBook).then(res => {console.log(res);if (res.data) {alert("修改成功！");// 关闭弹窗emit("ok");}}).catch(err => {})}})}const cancelFn = () => {emit('close');
}</script>

4、补充【api和axios封装】：api/crud.js；utils/serviceMock.js

api/crud.js


import service from "@/utils/serviceMock.js";// 获取所有书籍
export const getBooksApi = ()=>service.get('/books');// 根据编号获取书籍详情
export const getBookDetailApi = (id)=>service.get('/books/'+id);// 查询书籍
export const getBooksByCondationApi = (params)=>service.get('/books',{params});// 删除书籍
export const deleteBookApi = (id)=>service.delete('/books/'+id);// 添加书籍
export const addBookApi = (data)=>service.post('/books',data);// 修改书籍
export const editBookApi = (id,data)=>service.put('/books/'+id,data);// 获取书籍类型
export const getBookTypeApi = ()=>service.get('/bookType');

utils/serviceMock.js

import axios from 'axios';
import store from '@/store';const service = axios.create({baseURL:"http://localhost:3000"
})// 请求拦截器：所有请求的公共业务
service.interceptors.request.use(config=>{store.commit("showLoading");return config;
})// 响应拦截器
service.interceptors.response.use((res)=>{store.commit("hideLoading");// loading.close();return res;
})export default service;

5、mock数据，用json-server

{"books": [{"id": "878912","name": "水浒1","author": "施耐庵","price": 51.5,"img": "/src/assets/imgs/01.jpg","type": "hot"},{"id": "878913","name": "红楼梦","author": "曹雪芹2","price": 51.8,"img": "/src/assets/imgs/01.jpg","type": "hot"},{"id": "878917","name": "论语1","author": "王锐1","price": "5.38","img": "/imgs/img3.jpg","type": "new"},{"id": "878918","name": "老子","author": "李家恒","price": 54.8,"img": "/imgs/img4.jpg","type": "new"},{"id": "878919","name": "孟子2","author": "李家恒","price": 54.8,"img": "/images/img4.jpg","type": "new"},{"id": "878920","name": "孟子3","author": "李家恒","price": 54.8,"img": "/images/img4.jpg","type": "new"},{"id": "878921","name": "孟子4","author": "李家恒","price": 54.8,"img": "/images/img4.jpg","type": "new"},{"id": "878922","name": "孟子5","author": "李家恒","price": 54.8,"img": "/images/img4.jpg","type": "new"},{"id": "878923","name": "孟子6","author": "李家恒","price": 54.8,"img": "/images/img4.jpg","type": "new"},{"id": "01008","name": "霸道总裁爱上我","author": "曹宇","price": "9.9","img": "/src/imgs/01.jpg","type": "hot"},{"id": "01009","name": "西厢记","author": "赵蕊","price": "10.9","img": "/src/assets/imgs/01.jpg","type": "hot"},{"id": "01010","name": "钢铁是怎样炼成的","author": "奥斯特洛夫斯基","price": "11.9","img": "/src/assets/imgs/02.jpg","type": "hot"},{"id": "01011","name": "12","author": "22","price": 0,"img": "1","type": "hot"},{"id": "01012","name": "假如我是亿万富翁","author": "金莉","price": "1000","img": "/src/assets/imgs/01.jpg","type": "new"}],
}