ElementUI之增删改及表单验证

                       

                                 ⭐⭐本文章收录与ElementUI原创专栏：ElementUI专栏

                                     ⭐⭐   ElementUI的官网：ElementUI官网

目录

一.前言

二.使用ElementUI完成增删改

        2.1 后台代码

        2.2 前端代码

三.使用ElementUI完成表单验证

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一.前言

        本章是继上一篇的基础之上在做完善，上一篇是教大家如何使用ElementUI制作动态菜单栏以及表格的分页查询，本章就是继续上篇完成剩下的增删改功能，采用的是前后端分离，大家如果有不懂的可以点击上方的ElementUI的专栏进去查看哟~

二.使用ElementUI完成增删改

        2.1 后台代码

               增删改的后端代码：

  @RequestMapping("/addBook")@ResponseBodypublic JsonResponseBody<?> addBook(Book book){try {bookService.insert(book);return new JsonResponseBody<>("新增书本成功",true,0,null);} catch (Exception e) {e.printStackTrace();return new JsonResponseBody<>("新增书本失败",false,0,null);}}@RequestMapping("/editBook")@ResponseBodypublic JsonResponseBody<?> editBook(Book book){try {bookService.updateByPrimaryKey(book);return new JsonResponseBody<>("编辑书本成功",true,0,null);} catch (Exception e) {e.printStackTrace();return new JsonResponseBody<>("编辑书本失败",false,0,null);}}@RequestMapping("/delBook")@ResponseBodypublic JsonResponseBody<?> delBook(Book book){try {bookService.deleteByPrimaryKey(book.getId());return new JsonResponseBody<>("删除书本成功",true,0,null);} catch (Exception e) {e.printStackTrace();return new JsonResponseBody<>("删除书本失败",false,0,null);}}@RequestMapping("/queryBookPager")@ResponseBodypublic JsonResponseBody<List<Book>> queryBookPager(Book book, HttpServletRequest req){try {PageBean pageBean=new PageBean();pageBean.setRequest(req);List<Book> books = bookService.queryBookPager(book, pageBean);return new JsonResponseBody<>("OK",true,pageBean.getTotal(),books);} catch (Exception e) {e.printStackTrace();return new JsonResponseBody<>("分页查询书本失败",false,0,null);}}

        2.2 前端代码

        定义接口：         

        数据样式格式：都是去ElementUI官网copy的，然后根据自己的情况进行修改即可

<template><div class="books" style="padding: 20px;"><!-- 1.搜索框 --><el-form :inline="true" class="demo-form-inline"><el-form-item label="书籍名称"><el-input v-model="bookname" placeholder="书籍名称"></el-input></el-form-item><el-form-item><el-button type="primary" @click="onSubmit">查询</el-button><el-button type="primary" @click="open">新增</el-button></el-form-item></el-form><!-- 2.表格 --><el-table :data="tableData" style="width: 100%"><el-table-column prop="id" label="书籍ID" width="180"></el-table-column><el-table-column prop="bookname" label="书籍名称" width="180"></el-table-column><el-table-column prop="price" label="书籍价格" width="180"></el-table-column><el-table-column prop="booktype" label="书籍类型" width="180"></el-table-column><el-table-column label="操作"><template slot-scope="scope"><el-button size="mini" @click="open(scope.row)">编辑</el-button><el-button size="mini" type="danger" @click="del(scope.row)">删除</el-button></template></el-table-column></el-table><!-- 3.分页条 --><div class="block"><el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="page":page-sizes="[10, 20, 30, 40]" :page-size="100" layout="total, sizes, prev, pager, next, jumper" :total="total"></el-pagination></div><!-- 4.多功能弹出框 --><el-dialog :title='title' :visible.sync="dialogFormVisible" @close="clear"><el-form :model="book"><el-form-item label="书籍ID" :label-width="formLabelWidth"><el-input v-model="book.id" autocomplete="off"></el-input></el-form-item><el-form-item label="书籍名称" :label-width="formLabelWidth"><el-input v-model="book.bookname" autocomplete="off"></el-input></el-form-item><el-form-item label="书籍价格" :label-width="formLabelWidth"><el-input v-model="book.price" autocomplete="off"></el-input></el-form-item><el-form-item label="书籍类别" :label-width="formLabelWidth"><el-select v-model="book.booktype" placeholder="请选择书籍类型"><el-option v-for="t in types" :label="t.name" :value="t.name" :key="'key_'+t.id"></el-option></el-select></el-form-item></el-form><div slot="footer" class="dialog-footer"><el-button @click="dialogFormVisible = false">取 消</el-button><el-button type="primary" @click="dosub">确 定</el-button></div></el-dialog></div>
</template>

        逻辑代码：新增和修改是共用一个弹框，然后用 if 判断，改变窗口的标题，接着根据窗体的标题来判断调用新增的方法还是修改的方法，删除的弹框的话也是在ElementUI官网中找的，获取id进行删除整条数据。

<script>export default {data() {return {bookname: '',tableData: [],rows: 10,page: 1,total: 0,title: '新增界面',// 默认不展示窗口dialogFormVisible: false,formLabelWidth: "100px", //宽度types: [],book: {id: "",bookname: "",price: "",booktype: ""}}},methods: {//删除del(row) {this.$confirm('你确定要删除该数据嘛~亲?', '提示', {confirmButtonText: '确定',cancelButtonText: '取消',type: 'warning'}).then(() => {let url = this.axios.urls.BOOK_DEL;this.axios.post(url, {id:row.id}).then(r => {console.info(r);//弹出框this.$message({type: 'success',message: '删除成功!'});this.query({});}).catch(e => {})}).catch(() => {this.$message({type: 'info',message: '已取消删除'});});},dosub() {//新增//路由let url = this.axios.urls.BOOK_ADD;if (this.title == '编辑界面') {url = this.axios.urls.BOOK_UPD;}let params = {id: this.book.id,bookname: this.book.bookname,price: this.book.price,booktype: this.book.booktype};console.info(params);this.axios.post(url, params).then(r => {console.info(r);this.clear();this.query({});}).catch(e => {})},clear() {//初始化窗体this.dialogFormVisible = false;this.title = '新增界面';this.book = {id: "",bookname: "",pric: "",booktype: ""}},open(row) {//打开窗口this.dialogFormVisible = true;if (row) {this.title = '编辑界面';//赋值this.book.id = row.id;this.book.bookname = row.bookname;this.book.price = row.price;this.book.booktype = row.booktype;}},query(params) {//路由let url = this.axios.urls.BOOK_LIST;this.axios.get(url, {params: params}).then(r => {console.info(r);this.tableData = r.data.rows;this.total = r.data.total;}).catch(e => {})},onSubmit() {//模糊查询的字段let params = {bookname: this.bookname}this.query(params);},handleSizeChange(r) {// 当页大小发生变化let params = {bookname: this.bookname,rows: r,page: this.page}this.query(params);},handleCurrentChange(p) {// 当前页码发生变化let params = {bookname: this.bookname,rows: this.rows,page: p}this.query(params);}},created() {this.query({});//需要发ajax请求后台数据，在这里我给它定死了this.types = [{id: 1,name: '短文'}, {id: 2,name: '爱情'}, {id: 3,name: '爽文'}]}}
</script>

        看一下效果吧：

三.使用ElementUI完成表单验证

        第一步:去ElementUI官网搜索表单验证：会发现需要添加：

   第二步：指定需要验证的属性字段，添加：

第三步，写验证规则

rules: {bookname: [{required: true,message: '请输入书籍名称',trigger: 'blur'}],price: [{required: true,message: '请输入书籍价格',trigger: 'blur'}],booktype: [{required: true,message: '请输入书籍类型',trigger: 'blur'}]}

最后一步使用验证规则：

 

代码：

 dosub() {// 验证表单this.$refs['book'].validate((valid) => {if (valid) {//新增//路由let url = this.axios.urls.BOOK_ADD;if (this.title == '编辑界面') {url = this.axios.urls.BOOK_UPD;}let params = {id: this.book.id,bookname: this.book.bookname,price: this.book.price,booktype: this.book.booktype};console.info(params);this.axios.post(url, params).then(r => {console.info(r);this.clear();this.query({});}).catch(e => {})} else {console.log('error submit!!');return false;}});}

 好啦，看看效果吧！！