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vue+element-ui+axios实现图片上传

2019-08-20 11:12 1171 查看

本文实例为大家分享了vue+element-ui+axios实现图片上传的具体代码，供大家参考，具体内容如下

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>Examples</title>
<meta name="description" content="">
<meta name="keywords" content="">
<!-- 引入vue -->
<script src="https://cdn.jsdelivr.net/npm/vue"></script>
<!-- 引入axios -->
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<!-- 引入样式 -->
<link rel="stylesheet" href=https://unpkg.com/element-ui/lib/theme-chalk/index.css >
<!-- 引入组件库 -->
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
</head>
<body>
<div id="app">
<el-upload
:action="posterUrl"
:before-upload="beforeUpload"
:http-request="(params)=>uploadImage(params)"
:on-remove="(file, fileList)=>removeImage(file, fileList)"
list-type="picture"
accept="image/*"
>
<el-button size="small">选择图片</el-button>
</el-upload>
</div>

<script type="text/javascript">
new Vue({
el: '#app',
data: {
posterUrl: '',
imgUrls: [],
imgWidth: '320',
imgHeight: '400',
},
methods: {
beforeUpload(file) {
let _this = this;
let _checkSize = false; //是否需要指定上传图片的尺寸
if(file.size > 1024*500) { //大小超过500kb
_this.$message.error('图片太大，请重新选择');
return false;
}
const isSize = new Promise((resolve, reject)=>{
let _URL = window.URL || window.webkitURL;
let img = new Image();
img.onload = function () {
if(!_checkSize || (_checkSize && img.width==_this.imgWidth && img.height==_this.imgHeight)) {
resolve();
}
else {
reject();
}
}
img.src = _URL.createObjectURL(file);
}).then(()=>{
return file;
}, ()=>{
_this.$message.error('图片尺寸不对，请重新选择');
return Promise.reject();
});
return isSize;
},

uploadImage(params) {
console.log(params);
let uploadData = new FormData();
uploadData.append('file', params.file);
let config = {
headers: {
'Content-Type': 'multipart/form-data'
}
};
this.uploadPoster('homed'+new Date().getTime()+'/'+params.file.name, uploadData, config)
.then(res=>{
if(res.status == 200) {
params.onSuccess();
this.imgUrls.push({name:params.file.name, url:res.data.url});
console.log(this.imgUrls);
}
}).catch(error=>{
params.onError();
this.$message.error('上传失败');
});
},

removeImage(file, fileList) {
console.log(fileList);
},

uploadPoster(url, obj, config) {
let poster_upload_path = "http://xxxxxxxxxxxx/httpdocsup/poster/news/";
return axios.post(poster_upload_path+url, obj, config);
}
}
})
</script>
</body>
</html>

以上就是本文的全部内容，希望对大家的学习有所帮助

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标签： vue element ui axios 图片上传

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