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小白学习Java第四十二天

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我是靠谱客的博主 友好自行车，最近开发中收集的这篇文章主要介绍小白学习Java第四十二天，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

复习:

vue:

axios请求

第一代：

axios({

  method:””,

  url:””,

  data:””

}).then(resp=>{

   resp.data

}).catch(error=>{})

  第二代：

axios.get()

axios.post()

...

axios.put()

今日内容

  1. ElementUI概述
  2. ElementUI使用步骤
  3. 常用组件
  4. 改造项目
  • 概述
  1. 简介

官网：https://element.eleme.cn

         ElementUI，一套为开发者、设计师和产品经理准备的基于 Vue 2.0 的桌面端组件库。

是基于Vue的一个UI框架，该框架基于Vue开发了很多相关组件，方便我们快速开发页面。

饿了么前端团队基于Vue进行开发并开源，提供了封装好的组件。内部封装了HTML+CSS+JS。

  1. 下载安装

方式一：CDN引入

CDN在线引入时需要锁定版本

<!-- 引入样式 -->

<link rel="stylesheet"

href="https://unpkg.com/browse/element-ui@2.15.1/lib/theme-chalk/index.css">

<!-- 引入组件库 -->

<script src="https://unpkg.com/element-ui@2.15.1/lib/index.js"></script>

方式二：下载本地

<!-- 引入 elementUI 样式 -->

<link rel="stylesheet" href="./element-ui-2.13.0/lib/theme-chalk/index.css">

<!-- 引入elementUI 组件库 -->

<script src="./element-ui-2.13.0/lib/index.js"></script>

  • 常用组件
  1. 消息弹窗Message

说明：用于主动操作后的反馈提示

常用参数介绍：

 

 

 

案例：

<!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>Document</title>

    <!-- CSS -->

    <link rel="stylesheet" href="el/element-ui-2.13.0/lib/theme-chalk/index.css">

    <script src="el/vue.min.js"></script>

    <!-- JS -->

    <script src="el/element-ui-2.13.0/lib/index.js"></script>

</head>

<body>

    <div id="app">

        <el-button :plain="true" @click="open2" >成功</el-button>

        <el-button :plain="true" @click="open3">警告</el-button>

        <el-button :plain="true" @click="open1">消息</el-button>

        <el-button :plain="true" @click="open4">错误</el-button>

    </div>

    <script>

        var app = new Vue({

            el:"#app",

            methods: {

                open1() {

                    this.$message('这是一条消息提示');

                },

                open2() {

                    this.$message({

                        message: '恭喜你，这是一条成功消息',

                        type: 'success',

                        showClose:true,

                        duration:0

                    });

                },

                open3() {

                    this.$message({

                        message: '警告哦，这是一条警告消息',

                        type: 'warning',

                        center: true

                    });

                },

                open4() {

                    this.$message.error('错了哦，这是一条错误消息');

                }

            }

        })

    </script>

</body>

</html>

  1. 表格Table

说明：用于展示多条结构类似的数据，可对数据进行排序、筛选、对比或其他自定义操作。

1）el-table元素中

data表示绑定的表格数据

stripe 隔行变色

border 带边框的表格

2）el-table-column中

prop属性来对应对象中的属性值

label属性来定义表格的列名

width属性来定义列宽

type设置 selection 则显示多选

@selection-change="handleSelectionChange"

3）修改删除事件参数：

scope.$index当前行索引

scope.row当前行对象

案例：

<!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>Document</title>

    <!-- CSS -->

    <link rel="stylesheet" href="el/element-ui-2.13.0/lib/theme-chalk/index.css">

    <script src="el/vue.min.js"></script>

    <!-- JS -->

    <script src="el/element-ui-2.13.0/lib/index.js"></script>

</head>

<body>

    <div id="app">

        <el-table

        :data="tableData"

        stripe

        border

        @selection-change="handleSelectionChange"

        style="width: 100%">

        <el-table-column

        type="selection"

        width="55">

        </el-table-column>

        <el-table-column

          prop="date"

          label="日期"

          width="180">

        </el-table-column>

        <el-table-column

          prop="name"

          label="姓名"

          width="180">

        </el-table-column>

        <el-table-column

          prop="address"

          label="地址">

        </el-table-column>

        <el-table-column label="操作">

            <template slot-scope="scope">

              <el-button

                size="mini"

                @click="handleEdit(scope.$index, scope.row)">编辑</el-button>

              <el-button

                size="mini"

                type="danger"

                @click="handleDelete(scope.$index, scope.row)">删除</el-button>

            </template>

        </el-table-column>

      </el-table>

    </div>

    <script>

        var app = new Vue({

            el:"#app",

            data:{

                tableData: [{

                    date: '2016-05-02',

                    name: '王小虎',

                    address: '上海市普陀区金沙江路 1518 弄'

                }, {

                    date: '2016-05-04',

                    name: '王小虎',

                    address: '上海市普陀区金沙江路 1517 弄'

                }, {

                    date: '2016-05-01',

                    name: '王小虎',

                    address: '上海市普陀区金沙江路 1519 弄'

                }, {

                    date: '2016-05-03',

                    name: '王小虎',

                    address: '上海市普陀区金沙江路 1516 弄'

                }],

                multipleSelection: []

            },

            methods: {

                handleSelectionChange(val) {

                    this.multipleSelection = val;

                    // val是选中的每行记录对象的集合

                    console.log(val[0]);

                },

                handleEdit(index, row) {

                    console.log(index, row.name);

                },

                handleDelete(index, row) {

                    console.log(index, row.date);

                }

            }

        })

    </script>

</body>

</html>

 

  1. 分页Pagination

说明：当页面数据量过多时，使用分页分解数据。

属性说明：

layout 表示需要显示的内容，用逗号分隔，布局元素会依次显示

total表示总条目数

prev 上一页

next 下一页

pager表示页码列表

jumper表示跳页元素

sizes 用于设置每页显示的页码数量

prev-text 替代图标显示的上一页文字

next-text替代图标显示的下一页文字

事件说明：

size-change页码大小发生改变时触发

current-change当前页变动时候触发

案例：

<!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>Document</title>

    <!-- CSS -->

    <link rel="stylesheet" href="el/element-ui-2.13.0/lib/theme-chalk/index.css">

    <script src="el/vue.min.js"></script>

    <!-- JS -->

    <script src="el/element-ui-2.13.0/lib/index.js"></script>

</head>

<body>

    <div id="app">

        <el-pagination

        @size-change="handleSizeChange"

        @current-change="handleCurrentChange"

        prev-text = "上一页"

        next-text = "下一页"

        :current-page="currentPage4"

        :page-sizes="[100, 200, 300, 400]"

        :page-size="100"

        layout="total, sizes, prev, pager, next, jumper"

        :total="400">

      </el-pagination>

    </div>

    <script>

        var app = new Vue({

            el:"#app",

            data:{

                currentPage4: 4

            },

            methods: {

                handleSizeChange(val) {

                    console.log(`每页 ${val} 条`);

                },

                handleCurrentChange(val) {

                    console.log(`当前页: ${val}`);

                }

            }

        })

    </script>

</body>

</html>

 

  1. 对话框Dialog

说明：在保留当前页面状态的情况下，告知用户并承载相关操作。

参数说明：

title  对话框标题

width 对话框宽度

fullscreen 是否全屏显示，默认false

:visible.sync="dialogVisible" 是否显示对话框，根据boolean值显示

事件说明：

:before-close="handleClose" 关闭对话框之前触发

案例：

<!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>Document</title>

    <!-- CSS -->

    <link rel="stylesheet" href="el/element-ui-2.13.0/lib/theme-chalk/index.css">

    <script src="el/vue.min.js"></script>

    <!-- JS -->

    <script src="el/element-ui-2.13.0/lib/index.js"></script>

</head>

<body>

    <div id="app">

        <el-button type="text" @click="dialogVisible = true">点击打开 Dialog</el-button>

        <el-dialog

          title="修改学员信息"

          :visible.sync="dialogVisible"

          width="30%"

          fullscreen = true

          :before-close="handleClose">

          <span>这里可以放表单元素</span>

          <span slot="footer" class="dialog-footer">

            <el-button @click="dialogVisible = false">取 消</el-button>

            <el-button type="primary" @click="dialogVisible = false">确 定</el-button>

          </span>

        </el-dialog>

    </div>

    <script>

        var app = new Vue({

            el:"#app",

            data:{

                dialogVisible: false

            },

            methods: {

                handleClose(done) {

                    this.$confirm('确认关闭？')

                    .then(_ => {

                        done();

                    })

                    .catch(_ => {});

                }

            }

            

        })

    </script>

</body>

</html>

 

  1. Upload 上传

说明：通过点击或者拖拽上传文件。

参数说明：

action:上传地址，必选参加

limit: 上传可选文件个数限制

ref: 相当于上传控件名

:on-preview="handlePreview"  单击要上传的文件时触发

:on-remove="handleRemove"  单击删除X时触发

:file-list="fileList"  上传文件列表

:auto-upload="false"  是不可支持自动上传

上传事件：

页面中可能有多个上传控件，this.$refs.upload这里是指定哪个上传控件，uplodad是上面设置的ref属性值，submit()默认提交方法。

submitUpload() {

   this.$refs.upload.submit();

}

案例：

<!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>Document</title>

    <!-- CSS -->

    <link rel="stylesheet" href="el/element-ui-2.13.0/lib/theme-chalk/index.css">

    <script src="el/vue.min.js"></script>

    <!-- JS -->

    <script src="el/element-ui-2.13.0/lib/index.js"></script>

</head>

<body>

    <div id="app">

        <el-upload

        class="upload-demo"

        ref="upload"

        action="https://jsonplaceholder.typicode.com/posts/"

        :on-preview="handlePreview"

        :on-remove="handleRemove"

        :file-list="fileList"

        :auto-upload="false">

        <el-button slot="trigger" size="small" type="primary">选取文件</el-button>

        <el-button style="margin-left: 10px;" size="small" type="success" @click="submitUpload">上传到服务器</el-button>

        <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>

      </el-upload>

    </div>

    <script>

        var app = new Vue({

            el:"#app",

            data:{

                fileList: [{name: 'food.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}, {name: 'food2.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}]

            },

            methods: {

                submitUpload() {

                    //页面中可能有多个上传控件，$refs.upload

                    //这里是指定哪个上传控件，uplodad是上面设置的ref属性值

                    //submit()默认提交方法

                    this.$refs.upload.submit();

                },

                handleRemove(file, fileList) {

                    console.log(file, fileList);

                },

                handlePreview(file) {

                    console.log(file);

                }

            }

            

        })

    </script>

</body>

</html>

 

  1. 表单Form

说明：由输入框、选择器、单选框、多选框等控件组成，用以收集、校验、提交数据。

在el-form 组件中，每一个表单域由一个 el-form-item 组件构成，表单域中可以放置各种类型的表单控件，包括 Input、Select、Checkbox、Radio、Switch、TimePicker、DatePicker、Upload、InputNumber等元素组成。

表单元素：

  1. Input 输入框

属性说明：

disabled  禁用

clearable  带清空X

show-password 密码框

:rows="2" 多行文本框（文本域）

 

  1. Radio 单选框

事件说明：change 单击按钮时获取label的值

 

 

  1. Checkbox 多选框

 

 

  1. Select 选择器

 

 

  1. Button 按钮

 

Form 组件提供了表单验证的功能，只需要通过 rules 属性传入约定的验证规则，并将 Form-Item 的 prop 属性设置为需校验的字段名即可。

<!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>Document</title>

    <!-- CSS -->

    <link rel="stylesheet" href="el/element-ui-2.13.0/lib/theme-chalk/index.css">

    <script src="el/vue.min.js"></script>

    <!-- JS -->

    <script src="el/element-ui-2.13.0/lib/index.js"></script>

</head>

<body>

    <div id="app">

        <!-- 

            :model="ruleForm"表单绑定的数据集合

            :rules="rules" 表单验证的规则

            ref="ruleForm" 类似于表单名

         -->

        <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">

            <el-form-item label="活动名称" prop="name">

                <!-- 双向绑定数据 -->

              <el-input v-model="ruleForm.name"></el-input>

            </el-form-item>

            <el-form-item label="活动区域" prop="region">

              <el-select v-model="ruleForm.region" placeholder="请选择活动区域">

                <el-option label="区域一" value="shanghai"></el-option>

                <el-option label="区域二" value="beijing"></el-option>

              </el-select>

            </el-form-item>

            <el-form-item label="活动时间" required>

              <el-col :span="11">

                <el-form-item prop="date1">

                  <el-date-picker type="date" placeholder="选择日期" v-model="ruleForm.date1" style="width: 100%;"></el-date-picker>

                </el-form-item>

              </el-col>

              <el-col class="line" :span="2">-</el-col>

              <el-col :span="11">

                <el-form-item prop="date2">

                  <el-time-picker placeholder="选择时间" v-model="ruleForm.date2" style="width: 100%;"></el-time-picker>

                </el-form-item>

              </el-col>

            </el-form-item>

            <el-form-item label="即时配送" prop="delivery">

              <el-switch v-model="ruleForm.delivery"></el-switch>

            </el-form-item>

            <el-form-item label="活动性质" prop="type">

              <el-checkbox-group v-model="ruleForm.type">

                <el-checkbox label="美食/餐厅线上活动" name="type"></el-checkbox>

                <el-checkbox label="地推活动" name="type"></el-checkbox>

                <el-checkbox label="线下主题活动" name="type"></el-checkbox>

                <el-checkbox label="单纯品牌曝光" name="type"></el-checkbox>

              </el-checkbox-group>

            </el-form-item>

            <el-form-item label="特殊资源" prop="resource">

              <el-radio-group v-model="ruleForm.resource">

                <el-radio label="线上品牌商赞助"></el-radio>

                <el-radio label="线下场地免费"></el-radio>

              </el-radio-group>

            </el-form-item>

            <el-form-item label="活动形式" prop="desc">

              <el-input type="textarea" v-model="ruleForm.desc"></el-input>

            </el-form-item>

            <el-form-item>

              <el-button type="primary" @click="submitForm('ruleForm')">立即创建</el-button>

              <el-button @click="resetForm('ruleForm')">重置</el-button>

            </el-form-item>

          </el-form>    

    </div>

    <script>

        var app = new Vue({

            el:"#app",

            data:{

                ruleForm: {

                    name: '',

                    region: '',

                    date1: '',

                    date2: '',

                    delivery: false,

                    type: [],

                    resource: '',

                    desc: ''

                },

                rules: {

                    name: [

                        { required: true, message: '请输入活动名称', trigger: 'blur' },

                        { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }

                    ],

                    region: [

                        { required: true, message: '请选择活动区域', trigger: 'change' }

                    ],

                    date1: [

                        { type: 'date', required: true, message: '请选择日期', trigger: 'change' }

                    ],

                    date2: [

                        { type: 'date', required: true, message: '请选择时间', trigger: 'change' }

                    ],

                    type: [

                        { type: 'array', required: true, message: '请至少选择一个活动性质', trigger: 'change' }

                    ],

                    resource: [

                        { required: true, message: '请选择活动资源', trigger: 'change' }

                    ],

                    desc: [

                        { required: true, message: '请填写活动形式', trigger: 'blur' }

                    ]

                }

            },

            methods: {

                //提交表单

                submitForm(formName) {

                    this.$refs[formName].validate((valid) => {

                    if (valid) {//判断表单是否验证成功

                        alert('submit!');

                    } else {

                        console.log('error submit!!');

                        return false;

                    }

                    });

                },

                //重置表单

                resetForm(formName) {

                    this.$refs[formName].resetFields();

                }

            }

        })

    </script>

</body>

</html>

  1. Icon 图标

概述：常用的图标集合

使用方式：

1）HTML元素标签中使用class属性

2）组件标签使用icon属性

<i class="el-icon-edit"></i>

        <i class="el-icon-share"></i>

        <i class="el-icon-delete"></i>

        <p class="el-icon-plus"></p>

        <p class="el-icon-shopping-cart-full"></p>

        <el-button type="primary" icon="el-icon-search">搜索</el-button>

        <el-button type="primary" icon="el-icon-present">大礼包</el-button>

 

  1. 按钮Button

可以设置的属性有：

 

代码示例

<el-row>

        <el-button>默认按钮</el-button>

        <el-button type="primary" size="small">主要按钮</el-button>

        <el-button type="success" plain>成功按钮</el-button>

        <el-button type="info" round>信息按钮</el-button>

        <el-button type="warning">警告按钮</el-button>

        <el-button type="danger" circle>危险按钮</el-button>

        <el-button icon="el-icon-delete" circle type="danger"></el-button>

</el-row>

 

  • 项目改造

使用elementUI将图书项目进行改造。

  1. 显示列表页面和修改页面合并

 

<!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>图书列表页面</title>

    <style>

        tr {

            text-align: center;

        }

    </style>

    <link rel="stylesheet" href="el/element-ui-2.13.0/lib/theme-chalk/index.css">

    <script src="el/vue.min.js"></script>

    <script src="el/axios.min.js"></script>

    <script src="el/element-ui-2.13.0/lib/index.js"></script>

</head>

<body>

    <div id="app">

        <h2>图书列表展示</h2>

        <el-button type="primary" icon="el-icon-plus" @click="addBook()">添加新图书</el-button>

        <hr>

        <el-table :data="tableData" stripe border style="width: 100%">

            <el-table-column prop="bid" label="图书编号" width="180">

            </el-table-column>

            <el-table-column prop="bname" label="图书名称" width="180">

            </el-table-column>

            <el-table-column prop="bprice" label="图书价格">

            </el-table-column>

            <el-table-column prop="bauthor" label="图书作者">

            </el-table-column>

            <el-table-column prop="bdesc" label="图书简介">

            </el-table-column>

            <el-table-column label="操作">

                <template slot-scope="scope">

                    <el-button icon="el-icon-edit" type="primary" size="mini" @click="handleEdit(scope.$index, scope.row)">编辑

                    </el-button>

                    <el-button icon="el-icon-delete" size="mini" type="danger"

                        @click="handleDelete(scope.$index, scope.row)">删除</el-button>

                </template>

            </el-table-column>

        </el-table>

        <!-- 修改图书表单开始 -->

        <el-dialog title="修改图书信息" :visible.sync="dialogVisible" width="50%">

            <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">

                <el-form-item label="图书名称" prop="bname">

                    <el-input v-model="ruleForm.bname"></el-input>

                </el-form-item>

                <el-form-item label="图书价格" prop="bprice">

                    <el-input v-model="ruleForm.bprice"></el-input>

                </el-form-item>

                <el-form-item label="图书作者" prop="bauthor">

                    <el-input v-model="ruleForm.bauthor"></el-input>

                </el-form-item>

                <el-form-item label="图书简介" prop="bdesc">

                    <el-input v-model="ruleForm.bdesc"></el-input>

                </el-form-item>

                <el-form-item>

                    <el-button type="primary" @click="submitForm('ruleForm')">修改</el-button>

                    <el-button @click="back()">返回</el-button>

                </el-form-item>

            </el-form>

        </el-dialog>

        <!-- 修改图书表单结束 -->

    </div>

    <!-- vue代码开始 -->

    <script>

        var app = new Vue({

            el: "#app",

            data: {

                tableData: [],

                dialogVisible: false,

                ruleForm: {

                    bid: '',

                    bname: '',

                    bprice: '',

                    bauthor: '',

                    bdesc: ''

                },

                rules: {

                    bname: [

                        { required: true, message: '请输入活动名称', trigger: 'blur' },

                        { min: 1, max: 15, message: '长度在 3 到 5 个字符', trigger: 'blur' }

                    ],

                    bprice: [

                        { required: true, message: '请输入活动名称', trigger: 'blur' },

                    ],

                    bauthor: [

                        { required: true, message: '请输入活动名称', trigger: 'blur' },

                    ],

                    bdesc: [

                        { required: true, message: '请输入活动名称', trigger: 'blur' },

                    ]

                }

            },

            created() {

                this.findAllBook();

            },

            methods: {

                addBook(){

                    location.href = "addbook.html";

                },

                back() {

                    this.dialogVisible = false;

                },

                //提交表单

                submitForm(formName) {

                    this.$refs[formName].validate((valid) => {

                        if (valid) {//判断表单是否验证成功

                            //封装数据

                            var params = new URLSearchParams();

                            params.append("bname", this.ruleForm.bname);

                            params.append("bprice", this.ruleForm.bprice);

                            params.append("bauthor", this.ruleForm.bauthor);

                            params.append("bdesc", this.ruleForm.bdesc);

                            params.append("bid", this.ruleForm.bid);

                            params.append("method", "updateBook");

                            //向后台发送请求

                            axios({

                                method: "post",

                                data: params,

                                url: "http://localhost:8080/booksys/book"

                            }).then(resp => {

                                if (resp.data.code == 200) {

                                    this.$message({

                                        message: resp.data.msg,

                                        type: 'success'

                                    });

                                } else {

                                    this.$message({

                                        message: resp.data.msg,

                                        type: 'error'

                                    });

                                }

                                setTimeout(() => {

                                    //跳转到index.html首页

                                    location.href = "index.html";

                                }, 1500);

                            })

                        } else {

                            alert("表单验证失败");

                        }

                    });

                },

                handleEdit(index, row) {

                    this.dialogVisible = true;

                    this.ruleForm = row;

                },

                handleDelete(index, row) {

                    this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {

                        confirmButtonText: '确定',

                        cancelButtonText: '取消',

                        type: 'warning'

                    }).then(() => {

                         //请求后台服务器做删除操作

                         axios({

                            method: "get",

                            url: "http://localhost:8080/booksys/book?method=delBook&bid=" + row.bid

                        }).then(resp => {

                            this.$message({

                                type: 'success',

                                message: resp.data.msg

                            });

                            setTimeout(() => {

                                location.href = "index.html";

                            }, 1500);

                            

                        })

                    })

                    

                },

                findAllBook() {

                    //向后台服务器请求数据

                    axios({

                        method: "get",

                        url: "http://localhost:8080/booksys/book?method=findAllBook",

                    }).then(resp => {

                        console.log(resp.data.data);

                        this.tableData = resp.data.data;//将后台响应的所有图书信息赋值到vue的data变量中

                    })

                }

            }

        })

    </script>

</body>

</html>

  1. 添加页面

2.增加页面

 

<!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>添加图书</title>

    <link rel="stylesheet" href="el/element-ui-2.13.0/lib/theme-chalk/index.css">

    <script src="el/vue.min.js"></script>

    <script src="el/axios.min.js"></script>

    <script src="el/element-ui-2.13.0/lib/index.js"></script>

</head>

<body>

    <div id="app">

        <h2>添加新图书</h2>

      <!-- 表单 -->

      <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">

          <el-form-item label="图书名称" prop="bname">

            <el-input v-model="ruleForm.bname"></el-input>

          </el-form-item>

          <el-form-item label="图书价格" prop="bprice">

              <el-input v-model="ruleForm.bprice"></el-input>

          </el-form-item>

          <el-form-item label="图书作者" prop="bauthor">

              <el-input v-model="ruleForm.bauthor"></el-input>

          </el-form-item>

          <el-form-item label="图书简介" prop="bdesc">

              <el-input v-model="ruleForm.bdesc"></el-input>

          </el-form-item>

          <el-form-item>

            <el-button type="primary" @click="submitForm('ruleForm')">添加</el-button>

            <el-button @click="resetForm('ruleForm')">重置</el-button>

          </el-form-item>

    </el-form> 

    <!-- 添加图书表单结束 -->

    </div>

    <!-- vue代码开始 -->

    <script>

        var app = new Vue({

            el:"#app",

            data:{

                dialogVisible: false,

                ruleForm: {

                    bname: '',

                    bprice:'',

                    bauthor:'',

                    bdesc:''

                },

                rules: {

                    bname: [

                        { required: true, message: '请输入活动名称', trigger: 'blur' },

                        { min: 1, max: 15, message: '长度在 3 到 5 个字符', trigger: 'blur' }

                    ],

                    bprice: [

                        { required: true, message: '请输入活动名称', trigger: 'blur' },

                    ],

                    bauthor: [

                        { required: true, message: '请输入活动名称', trigger: 'blur' },

                    ],

                    bdesc: [

                        { required: true, message: '请输入活动名称', trigger: 'blur' },

                    ]

                }

            },

            methods:{

                //提交表单

                submitForm(formName) {

                    this.$refs[formName].validate((valid) => {

                        if (valid) {//判断表单是否验证成功

                            //封装数据

                            var params = new URLSearchParams();

                            params.append("bname",this.ruleForm.bname);

                            params.append("bprice",this.ruleForm.bprice);

                            params.append("bauthor",this.ruleForm.bauthor);

                            params.append("bdesc",this.ruleForm.bdesc);

                            params.append("method","addBook");

                            axios({

                                method:"post",

                                url:"http://localhost:8080/booksys/book",

                                data:params

                            }).then(resp=>{

                                if(resp.data.code==200){

                                    this.$message({

                                        message: resp.data.msg,

                                        type: 'success'

                                    });

                                }else{

                                    this.$message({

                                        message: resp.data.msg,

                                        type: 'error'

                                    });

                                }

                                setTimeout(() => {

                                    //跳转到index.html首页

                                    location.href = "index.html";

                                }, 1500);

                                

                            })

                        } else {

                            alert("表单验证失败");

                        }

                    });

                },

                //重置表单

                resetForm(formName) {

                    this.$refs[formName].resetFields();

                }

            }

        })

    </script>

</body>

</html>

最后

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