文章来源:https://www.toymoban.com/news/detail-431712.html
- 用到了
自定义组件v-model的双向绑定
- 使用
input的type=file这个原生html元
素,通过监听change事件
,获取到选择的文件(注意,选择完文件值后,要把这个隐藏的input的type=file元素的value置为空
,否则,下次选择同样的图片,将不会触发change事件) - 使用
axios + formData 上传文件
- 后台做保存文件,以及
静态资源目录映射
即可
前端
AvatarUpload.vue
<template>
<div class="avatar-upload-wrapper">
<!-- {{ modelValue }} -->
<div :class="['avatar-box',{'avatar-box-border':imgUrl?false:true}]" @click="clickAvatarBox" :style="{width: size + 'px',height: size + 'px'}">
<!-- 隐藏的input的type=file -->
<input type="file" hidden ref="fileInputRef" accept="image/x-png,image/gif,image/jpeg,image/bmp" @change="changeFile">
<img v-if="imgUrl" :src="imgUrl" alt="">
<div v-else class="avatar-marker">
<i class="iconfont icon-jiahao"></i>
</div>
</div>
</div>
</template>
<script setup>
import Messager from '@/utils/messager'
import axiosInstance from '@/utils/request'
import { ref,reactive,watch } from 'vue'
const emits = defineEmits(['update:modelValue'])
const props = defineProps({
size: {
type: Number,
default: 64
},
modelValue: {
type: String,
default: '' // 默认头像链接地址
},
maxSize: {
type:Number,
default: 5 // 默认最大不超过5M
},
serverUrl: {
type:String,
default: 'http://localhost:9091/static/img'
}
})
const fileInputRef =ref(null)
// const imgUrl = ref('http://localhost:9091/static/img/avatar/3026520210706112210298.png')
const imgUrl = ref(props.modelValue)
// console.log(imgUrl.value);
// 监听头像url改变(打开弹框时, 传入的图片地址变化时, 同步修改imgUrl)
watch(()=>props.modelValue,(newVal,oldVal)=>{
imgUrl.value = newVal
})
function clickAvatarBox() {
fileInputRef.value.click()
}
function changeFile() {
console.log(123,fileInputRef.value.files[0].size);
// 获取更改后的文件
let file = fileInputRef.value.files[0]
// 校验文件大小
if(file.size / 1024 / 1024 > props.maxsize) {
Messager.error('文件超过指定大小')
}
// 执行文件上传
let formData = new FormData()
formData.append("mfile", file)
formData.append("type", "avatar")
let config = {
headers: {
'Content-Type': 'multipart/form-data',
'a':'b' // 随便自己带个什么请求头
}
} // 这个config可以不必携带, 当使用FormData传参时,
// axios会自己带上'Content-Type': 'multipart/form-data',请求头
axiosInstance.post('/file/uploadFile',formData,config ).then(res=>{
console.log(res,'上传成功');
imgUrl.value = props.serverUrl + res
let img = new Image()
img.src = imgUrl.value
img.onload = ()=>{
emits('update:modelValue', imgUrl.value)
}
})
}
</script>
<style lang="scss" scoped>
.avatar-box-border {
border: 1px dashed #409eff !important;
}
.avatar-box {
border-radius: 50%;
margin-left: 20px;
cursor: pointer;
position: relative;
border: 2px solid #eee;
overflow: hidden;
&:hover::before {
content:'';
display: block;
position: absolute;
width: 100%;
height: 100%;
background: rgba(0,0,0,.03);
}
img {
width: 100%;
height: 100%;
object-fit: cover;
}
.avatar-marker {
position: absolute;
width: 100%;
height: 100%;
display: flex;
align-items: center;
justify-content: center;
color: #409eff;
i.iconfont {
font-size: 24px;
}
}
}
</style>
使用AvatarUpload.vue
<el-dialog v-model="userDialogVisible" width="450">
<el-form :model="userForm" :rules="userFormRules" label-width="80">
<el-form-item label="昵称" prop="nickname">
<el-input v-model="userForm.nickname" style="width: 300px;"></el-input>
</el-form-item>
<!-- 使用头像上传组件 -->
<el-form-item label="头像" prop="avatar">
<avatar-upload v-model="userForm.avatar" />
</el-form-item>
<el-form-item label="个性签名" prop="bio">
<el-scrollbar>
<el-input type="textarea" :rows="3" v-model="userForm.bio" style="width: 300px;"></el-input>
</el-scrollbar>
</el-form-item>
<el-form-item label="网站链接" prop="website">
<el-input v-model="userForm.website" style="width: 300px;"></el-input>
</el-form-item>
<el-form-item label="是否可用" prop="disabled">
<el-switch v-model="userForm.disabled" :active-value="0" :inactive-value="1" active-color="#13ce66"
inactive-color="#eaecf0">
</el-switch>
</el-form-item>
<el-form-item>
<div style="margin-left: auto;">
<el-button @click="userDialogVisible = false">取消</el-button>
<el-button type="primary" @click="handleSave">确定</el-button>
</div>
</el-form-item>
</el-form>
</el-dialog>
后端
上传接口
@PostMapping("uploadFile")
public Result<String> uploadFile(@RequestParam("mfile") MultipartFile mfile, String type) {
return Result.ok(fileService.saveFile(mfile,type));
}
@Override
public String saveFile(MultipartFile mfile, String type) {
String filePath = FilePathEnum.type(type).getPathPrefix() + SnowflakeIdWorker.generateId().substring(0, 8) + mfile.getOriginalFilename();
String targetFilePath = fileSavePath + filePath;
try {
mfile.transferTo(new File(targetFilePath));
} catch (IOException e) {
throw BizException.SAVE_FILE_ERR;
}
return filePath;
}
配置mvc文章来源地址https://www.toymoban.com/news/detail-431712.html
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/static/**")
.addResourceLocations("file:D:\\Projects\\boot-blog\\src\\main\\resources\\static\\");
}
}
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