Element ui &多选框、输入框、下拉框、开关、上传文件
作者:互联网
ElementUI多选框
Checkbox
使用
<el-checkbox v-model="checked">备选项</el-checkbox>
<template>
<div>
<el-checkbox :indeterminate="isIndeterminate" v-model="checkAll" @change="handleCheckAllChange">全选</el-checkbox>
<div style="margin: 15px 0;"></div>
<el-checkbox-group v-model="checkedCities" @change="handleCheckedCitiesChange">
<el-checkbox v-for="city in cities" :label="city" :key="city">{{city}}</el-checkbox>
</el-checkbox-group>
</div>
</template>
<script>
const cityOptions = ['上海', '北京', '广州', '深圳'];
export default {
data() {
return {
checkAll: false,
checkedCities: ['上海', '北京'],
cities: cityOptions,
isIndeterminate: true
};
},
methods: {
handleCheckAllChange(val) {
this.checkedCities = val ? cityOptions : [];
this.isIndeterminate = false;
},
handleCheckedCitiesChange(value) {
let checkedCount = value.length;
this.checkAll = checkedCount === this.cities.length;
this.isIndeterminate = checkedCount > 0 && checkedCount < this.cities.length;
}
}
};
</script>
<style scoped>
</style>
ElementUI输入框
受控组件:只能用v-model绑定
size属性修改输入框的大小:修改的是高度
large/medium/small/mini
修改宽度可以在外层套一个div,通过修改div的宽度来修改输入框的宽度
show-password是一个可以切换显示效果的密码框
通过prefix-icon、suffix-icon来设置首尾的图标
maxlength来设置最大长度
minlength来设置最小长度
show-word-limit显示输入的长度
<template>
<div>
<el-input v-model="input" placeholder="请输入内容" maxlength="20" show-word-limit></el-input>
<el-button type="primary" @click="click">按钮</el-button>
</div>
</template>
<script>
const cityOptions = ['上海', '北京', '广州', '深圳'];
export default {
data() {
return {
input:''
};
},
methods: {
click(){
this.input='abc'
}
}
};
</script>
<style scoped>
</style>
ElementUI下拉框
el-select和el-option
:disabled="true"
<template>
<div>
<el-select v-model="value" placeholder="请选择">
<el-option
v-for="item in options"
:key="item.value"
:label="item.label"
:value="item.value">
</el-option>
</el-select>
</div>
</template>
<script>
export default {
data() {
return {
options: [{
value: '选项1',
label: '黄金糕'
}, {
value: '选项2',
label: '双皮奶'
}, {
value: '选项3',
label: '蚵仔煎'
}, {
value: '选项4',
label: '龙须面'
}, {
value: '选项5',
label: '北京烤鸭'
}],
value: ''
}
}
}
</script>
<style scoped>
</style>
ElementUI开关
Switch组件:两种相互对立状态的切换
el-switch
v-model来数据绑定
Boolean来表示开关
active-color:与inactive-colorl来设置开关的颜色
active-text和inactive-text设置开关对应的文本
change事件开关时触发该时间
<el-switch
v-model="value"
active-color="#13ce66"
inactive-color="#ff4949">
</el-switch>
<script>
export default {
data() {
return {
value: true
}
}
};
</script>
ElementUI上传文件
前段
el-upload
<el-upload
class="upload-demo"
drag
action="https://jsonplaceholder.typicode.com/posts/"
multiple>
<i class="el-icon-upload"></i>
<div class="el-upload__text">将文件拖到此处,或<em>点击上传</em></div>
<div class="el-upload__tip" slot="tip">只能上传jpg/png文件,且不超过500kb</div>
</el-upload>
后端
springboot+EasyExcel完成后端数据的解析
1.pom.xml 中导入easyExcel的依赖
<!-- easyEecel-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>easyexcel</artifactId>
<version>2.2.6</version>
</dependency>
2.创建一个类来映射Excel文件
package com.southwind.springboot.entity;
import com.alibaba.excel.annotation.ExcelProperty;
import lombok.Data;
@Data
public class test {
@ExcelProperty("编号")
private Integer id;
@ExcelProperty("姓名")
private String name;
@ExcelProperty("性别")
private String gender;
@ExcelProperty("年龄")
private Integer age;
@ExcelProperty("班级")
private String classes;
}
3.创建一个ExcelService,实现数据解析
接口:
package com.southwind.springboot.service;
import com.southwind.springboot.entity.Test;
import java.io.InputStream;
import java.util.List;
public interface ExcelService {
public List<Test> list(InputStream inputStream);
}
实现:
package com.southwind.springboot.service.impl;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.southwind.springboot.entity.Test;
import com.southwind.springboot.service.ExcelService;
import org.springframework.stereotype.Service;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
@Service
public class ExcelServiceImpl implements ExcelService {
@Override
public List<Test> list(InputStream inputStream) {
List<Test> list=new ArrayList<>();
EasyExcel.read(inputStream)
.head(Test.class)
.sheet()
.registerReadListener(new AnalysisEventListener<Test>() {
@Override
public void invoke(Test test, AnalysisContext analysisContext) {
list.add(test);
}
@Override
public void doAfterAllAnalysed(AnalysisContext analysisContext) {
System.out.println("数据解析完成");
}
}).doRead();
return list;
}
}
标签:springboot,public,ExcelProperty,value,Element,输入框,import,com,下拉框 来源: https://www.cnblogs.com/HJZ114152/p/16407125.html